Remove Callback/Bind/Tuple from butil

Makefile

@@ -41,13 +41,9 @@ BUTIL_SOURCES = \
     src/butil/arena.cpp \
     src/butil/at_exit.cc \
     src/butil/atomicops_internals_x86_gcc.cc \
-    src/butil/barrier_closure.cc \
     src/butil/base64.cc \
     src/butil/base_switches.cc \
     src/butil/big_endian.cc \
-    src/butil/bind_helpers.cc \
-    src/butil/callback_helpers.cc \
-    src/butil/callback_internal.cc \
     src/butil/cpu.cc \
     src/butil/debug/alias.cc \
     src/butil/debug/asan_invalid_access.cc \

src/butil/at_exit.cc

@@ -7,8 +7,6 @@
 #include <stddef.h>
 #include <ostream>
 
-#include "butil/bind.h"
-#include "butil/callback.h"
 #include "butil/logging.h"
 
 namespace butil {
@@ -44,18 +42,13 @@ AtExitManager::~AtExitManager() {
 // static
 void AtExitManager::RegisterCallback(AtExitCallbackType func, void* param) {
   DCHECK(func);
-  RegisterTask(butil::Bind(func, param));
-}
-
-// static
-void AtExitManager::RegisterTask(butil::Closure task) {
   if (!g_top_manager) {
     NOTREACHED() << "Tried to RegisterCallback without an AtExitManager";
     return;
   }
 
   AutoLock lock(g_top_manager->lock_);
-  g_top_manager->stack_.push(task);
+  g_top_manager->stack_.push({func, param});
 }
 
 // static
@@ -68,8 +61,8 @@ void AtExitManager::ProcessCallbacksNow() {
   AutoLock lock(g_top_manager->lock_);
 
   while (!g_top_manager->stack_.empty()) {
-    butil::Closure task = g_top_manager->stack_.top();
-    task.Run();
+    Callback task = g_top_manager->stack_.top();
+    task.func(task.param);
     g_top_manager->stack_.pop();
   }
 }

src/butil/at_exit.h

@@ -9,7 +9,6 @@
 
 #include "butil/base_export.h"
 #include "butil/basictypes.h"
-#include "butil/callback.h"
 #include "butil/synchronization/lock.h"
 
 namespace butil {
@@ -42,9 +41,6 @@ class BASE_EXPORT AtExitManager {
   // the callback function is void func(void*).
   static void RegisterCallback(AtExitCallbackType func, void* param);
 
-  // Registers the specified task to be called at exit.
-  static void RegisterTask(butil::Closure task);
-
   // Calls the functions registered with RegisterCallback in LIFO order. It
   // is possible to register new callbacks after calling this function.
   static void ProcessCallbacksNow();
@@ -57,8 +53,12 @@ class BASE_EXPORT AtExitManager {
   explicit AtExitManager(bool shadow);
 
  private:
+  struct Callback {
+    AtExitCallbackType func;
+    void* param;
+  };
   butil::Lock lock_;
-  std::stack<butil::Closure> stack_;
+  std::stack<Callback> stack_;
   AtExitManager* next_manager_;  // Stack of managers to allow shadowing.
 
   DISALLOW_COPY_AND_ASSIGN(AtExitManager);

src/butil/barrier_closure.cc

-// Copyright 2013 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "butil/barrier_closure.h"
-
-#include "butil/atomic_ref_count.h"
-#include "butil/bind.h"
-
-namespace {
-
-// Maintains state for a BarrierClosure.
-class BarrierInfo {
- public:
-  BarrierInfo(int num_callbacks_left, const butil::Closure& done_closure);
-  void Run();
-
- private:
-  butil::AtomicRefCount num_callbacks_left_;
-  butil::Closure done_closure_;
-};
-
-BarrierInfo::BarrierInfo(int num_callbacks, const butil::Closure& done_closure)
-    : num_callbacks_left_(num_callbacks),
-      done_closure_(done_closure) {
-}
-
-void BarrierInfo::Run() {
-  DCHECK(!butil::AtomicRefCountIsZero(&num_callbacks_left_));
-  if (!butil::AtomicRefCountDec(&num_callbacks_left_)) {
-    done_closure_.Run();
-    done_closure_.Reset();
-  }
-}
-
-}  // namespace
-
-namespace butil {
-
-butil::Closure BarrierClosure(int num_callbacks_left,
-                             const butil::Closure& done_closure) {
-  DCHECK(num_callbacks_left >= 0);
-
-  if (num_callbacks_left == 0)
-    done_closure.Run();
-
-  return butil::Bind(&BarrierInfo::Run,
-                    butil::Owned(
-                        new BarrierInfo(num_callbacks_left, done_closure)));
-}
-
-}  // namespace butil

src/butil/barrier_closure.h

-// Copyright 2013 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef BASE_BARRIER_CLOSURE_H_
-#define BASE_BARRIER_CLOSURE_H_
-
-#include "butil/base_export.h"
-#include "butil/callback_forward.h"
-
-namespace butil {
-
-// BarrierClosure executes |done_closure| after it has been invoked
-// |num_closures| times.
-//
-// If |num_closures| is 0, |done_closure| is executed immediately.
-//
-// BarrierClosure is thread-safe - the count of remaining closures is
-// maintained as a butil::AtomicRefCount. |done_closure| will be run on
-// the thread that calls the final Run() on the returned closures.
-//
-// |done_closure| is also Reset() on the final calling thread but due to the
-// refcounted nature of callbacks, it is hard to know what thread resources
-// will be released on.
-BASE_EXPORT butil::Closure BarrierClosure(int num_closures,
-                                         const butil::Closure& done_closure);
-
-}  // namespace butil
-
-#endif  // BASE_BARRIER_CLOSURE_H_

src/butil/bind.h

-// This file was GENERATED by command:
-//     pump.py bind.h.pump
-// DO NOT EDIT BY HAND!!!
-
-
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef BASE_BIND_H_
-#define BASE_BIND_H_
-
-#include "butil/bind_internal.h"
-#include "butil/callback_internal.h"
-
-// -----------------------------------------------------------------------------
-// Usage documentation
-// -----------------------------------------------------------------------------
-//
-// See butil/callback.h for documentation.
-//
-//
-// -----------------------------------------------------------------------------
-// Implementation notes
-// -----------------------------------------------------------------------------
-//
-// If you're reading the implementation, before proceeding further, you should
-// read the top comment of butil/bind_internal.h for a definition of common
-// terms and concepts.
-//
-// RETURN TYPES
-//
-// Though Bind()'s result is meant to be stored in a Callback<> type, it
-// cannot actually return the exact type without requiring a large amount
-// of extra template specializations. The problem is that in order to
-// discern the correct specialization of Callback<>, Bind would need to
-// unwrap the function signature to determine the signature's arity, and
-// whether or not it is a method.
-//
-// Each unique combination of (arity, function_type, num_prebound) where
-// function_type is one of {function, method, const_method} would require
-// one specialization.  We eventually have to do a similar number of
-// specializations anyways in the implementation (see the Invoker<>,
-// classes).  However, it is avoidable in Bind if we return the result
-// via an indirection like we do below.
-//
-// TODO(ajwong): We might be able to avoid this now, but need to test.
-//
-// It is possible to move most of the COMPILE_ASSERT asserts into BindState<>,
-// but it feels a little nicer to have the asserts here so people do not
-// need to crack open bind_internal.h.  On the other hand, it makes Bind()
-// harder to read.
-
-namespace butil {
-
-template <typename Functor>
-butil::Callback<
-    typename internal::BindState<
-        typename internal::FunctorTraits<Functor>::RunnableType,
-        typename internal::FunctorTraits<Functor>::RunType,
-        void()>
-            ::UnboundRunType>
-Bind(Functor functor) {
-  // Typedefs for how to store and run the functor.
-  typedef typename internal::FunctorTraits<Functor>::RunnableType RunnableType;
-  typedef typename internal::FunctorTraits<Functor>::RunType RunType;
-
-  typedef internal::BindState<RunnableType, RunType, void()> BindState;
-
-
-  return Callback<typename BindState::UnboundRunType>(
-      new BindState(internal::MakeRunnable(functor)));
-}
-
-template <typename Functor, typename P1>
-butil::Callback<
-    typename internal::BindState<
-        typename internal::FunctorTraits<Functor>::RunnableType,
-        typename internal::FunctorTraits<Functor>::RunType,
-        void(typename internal::CallbackParamTraits<P1>::StorageType)>
-            ::UnboundRunType>
-Bind(Functor functor, const P1& p1) {
-  // Typedefs for how to store and run the functor.
-  typedef typename internal::FunctorTraits<Functor>::RunnableType RunnableType;
-  typedef typename internal::FunctorTraits<Functor>::RunType RunType;
-
-  // Use RunnableType::RunType instead of RunType above because our
-  // checks should below for bound references need to know what the actual
-  // functor is going to interpret the argument as.
-  typedef internal::FunctionTraits<typename RunnableType::RunType>
-      BoundFunctorTraits;
-
-  // Do not allow binding a non-const reference parameter. Non-const reference
-  // parameters are disallowed by the Google style guide.  Also, binding a
-  // non-const reference parameter can make for subtle bugs because the
-  // invoked function will receive a reference to the stored copy of the
-  // argument and not the original.
-  COMPILE_ASSERT(
-      !(is_non_const_reference<typename BoundFunctorTraits::A1Type>::value ),
-      do_not_bind_functions_with_nonconst_ref);
-
-  // For methods, we need to be careful for parameter 1.  We do not require
-  // a scoped_refptr because BindState<> itself takes care of AddRef() for
-  // methods. We also disallow binding of an array as the method's target
-  // object.
-  COMPILE_ASSERT(
-      internal::HasIsMethodTag<RunnableType>::value ||
-          !internal::NeedsScopedRefptrButGetsRawPtr<P1>::value,
-      p1_is_refcounted_type_and_needs_scoped_refptr);
-  COMPILE_ASSERT(!internal::HasIsMethodTag<RunnableType>::value ||
-                     !is_array<P1>::value,
-                 first_bound_argument_to_method_cannot_be_array);
-  typedef internal::BindState<RunnableType, RunType,
-      void(typename internal::CallbackParamTraits<P1>::StorageType)> BindState;
-
-
-  return Callback<typename BindState::UnboundRunType>(
-      new BindState(internal::MakeRunnable(functor), p1));
-}
-
-template <typename Functor, typename P1, typename P2>
-butil::Callback<
-    typename internal::BindState<
-        typename internal::FunctorTraits<Functor>::RunnableType,
-        typename internal::FunctorTraits<Functor>::RunType,
-        void(typename internal::CallbackParamTraits<P1>::StorageType,
-            typename internal::CallbackParamTraits<P2>::StorageType)>
-            ::UnboundRunType>
-Bind(Functor functor, const P1& p1, const P2& p2) {
-  // Typedefs for how to store and run the functor.
-  typedef typename internal::FunctorTraits<Functor>::RunnableType RunnableType;
-  typedef typename internal::FunctorTraits<Functor>::RunType RunType;
-
-  // Use RunnableType::RunType instead of RunType above because our
-  // checks should below for bound references need to know what the actual
-  // functor is going to interpret the argument as.
-  typedef internal::FunctionTraits<typename RunnableType::RunType>
-      BoundFunctorTraits;
-
-  // Do not allow binding a non-const reference parameter. Non-const reference
-  // parameters are disallowed by the Google style guide.  Also, binding a
-  // non-const reference parameter can make for subtle bugs because the
-  // invoked function will receive a reference to the stored copy of the
-  // argument and not the original.
-  COMPILE_ASSERT(
-      !(is_non_const_reference<typename BoundFunctorTraits::A1Type>::value ||
-          is_non_const_reference<typename BoundFunctorTraits::A2Type>::value ),
-      do_not_bind_functions_with_nonconst_ref);
-
-  // For methods, we need to be careful for parameter 1.  We do not require
-  // a scoped_refptr because BindState<> itself takes care of AddRef() for
-  // methods. We also disallow binding of an array as the method's target
-  // object.
-  COMPILE_ASSERT(
-      internal::HasIsMethodTag<RunnableType>::value ||
-          !internal::NeedsScopedRefptrButGetsRawPtr<P1>::value,
-      p1_is_refcounted_type_and_needs_scoped_refptr);
-  COMPILE_ASSERT(!internal::HasIsMethodTag<RunnableType>::value ||
-                     !is_array<P1>::value,
-                 first_bound_argument_to_method_cannot_be_array);
-  COMPILE_ASSERT(!internal::NeedsScopedRefptrButGetsRawPtr<P2>::value,
-                 p2_is_refcounted_type_and_needs_scoped_refptr);
-  typedef internal::BindState<RunnableType, RunType,
-      void(typename internal::CallbackParamTraits<P1>::StorageType,
-      typename internal::CallbackParamTraits<P2>::StorageType)> BindState;
-
-
-  return Callback<typename BindState::UnboundRunType>(
-      new BindState(internal::MakeRunnable(functor), p1, p2));
-}
-
-template <typename Functor, typename P1, typename P2, typename P3>
-butil::Callback<
-    typename internal::BindState<
-        typename internal::FunctorTraits<Functor>::RunnableType,
-        typename internal::FunctorTraits<Functor>::RunType,
-        void(typename internal::CallbackParamTraits<P1>::StorageType,
-            typename internal::CallbackParamTraits<P2>::StorageType,
-            typename internal::CallbackParamTraits<P3>::StorageType)>
-            ::UnboundRunType>
-Bind(Functor functor, const P1& p1, const P2& p2, const P3& p3) {
-  // Typedefs for how to store and run the functor.
-  typedef typename internal::FunctorTraits<Functor>::RunnableType RunnableType;
-  typedef typename internal::FunctorTraits<Functor>::RunType RunType;
-
-  // Use RunnableType::RunType instead of RunType above because our
-  // checks should below for bound references need to know what the actual
-  // functor is going to interpret the argument as.
-  typedef internal::FunctionTraits<typename RunnableType::RunType>
-      BoundFunctorTraits;
-
-  // Do not allow binding a non-const reference parameter. Non-const reference
-  // parameters are disallowed by the Google style guide.  Also, binding a
-  // non-const reference parameter can make for subtle bugs because the
-  // invoked function will receive a reference to the stored copy of the
-  // argument and not the original.
-  COMPILE_ASSERT(
-      !(is_non_const_reference<typename BoundFunctorTraits::A1Type>::value ||
-          is_non_const_reference<typename BoundFunctorTraits::A2Type>::value ||
-          is_non_const_reference<typename BoundFunctorTraits::A3Type>::value ),
-      do_not_bind_functions_with_nonconst_ref);
-
-  // For methods, we need to be careful for parameter 1.  We do not require
-  // a scoped_refptr because BindState<> itself takes care of AddRef() for
-  // methods. We also disallow binding of an array as the method's target
-  // object.
-  COMPILE_ASSERT(
-      internal::HasIsMethodTag<RunnableType>::value ||
-          !internal::NeedsScopedRefptrButGetsRawPtr<P1>::value,
-      p1_is_refcounted_type_and_needs_scoped_refptr);
-  COMPILE_ASSERT(!internal::HasIsMethodTag<RunnableType>::value ||
-                     !is_array<P1>::value,
-                 first_bound_argument_to_method_cannot_be_array);
-  COMPILE_ASSERT(!internal::NeedsScopedRefptrButGetsRawPtr<P2>::value,
-                 p2_is_refcounted_type_and_needs_scoped_refptr);
-  COMPILE_ASSERT(!internal::NeedsScopedRefptrButGetsRawPtr<P3>::value,
-                 p3_is_refcounted_type_and_needs_scoped_refptr);
-  typedef internal::BindState<RunnableType, RunType,
-      void(typename internal::CallbackParamTraits<P1>::StorageType,
-      typename internal::CallbackParamTraits<P2>::StorageType,
-      typename internal::CallbackParamTraits<P3>::StorageType)> BindState;
-
-
-  return Callback<typename BindState::UnboundRunType>(
-      new BindState(internal::MakeRunnable(functor), p1, p2, p3));
-}
-
-template <typename Functor, typename P1, typename P2, typename P3, typename P4>
-butil::Callback<
-    typename internal::BindState<
-        typename internal::FunctorTraits<Functor>::RunnableType,
-        typename internal::FunctorTraits<Functor>::RunType,
-        void(typename internal::CallbackParamTraits<P1>::StorageType,
-            typename internal::CallbackParamTraits<P2>::StorageType,
-            typename internal::CallbackParamTraits<P3>::StorageType,
-            typename internal::CallbackParamTraits<P4>::StorageType)>
-            ::UnboundRunType>
-Bind(Functor functor, const P1& p1, const P2& p2, const P3& p3, const P4& p4) {
-  // Typedefs for how to store and run the functor.
-  typedef typename internal::FunctorTraits<Functor>::RunnableType RunnableType;
-  typedef typename internal::FunctorTraits<Functor>::RunType RunType;
-
-  // Use RunnableType::RunType instead of RunType above because our
-  // checks should below for bound references need to know what the actual
-  // functor is going to interpret the argument as.
-  typedef internal::FunctionTraits<typename RunnableType::RunType>
-      BoundFunctorTraits;
-
-  // Do not allow binding a non-const reference parameter. Non-const reference
-  // parameters are disallowed by the Google style guide.  Also, binding a
-  // non-const reference parameter can make for subtle bugs because the
-  // invoked function will receive a reference to the stored copy of the
-  // argument and not the original.
-  COMPILE_ASSERT(
-      !(is_non_const_reference<typename BoundFunctorTraits::A1Type>::value ||
-          is_non_const_reference<typename BoundFunctorTraits::A2Type>::value ||
-          is_non_const_reference<typename BoundFunctorTraits::A3Type>::value ||
-          is_non_const_reference<typename BoundFunctorTraits::A4Type>::value ),
-      do_not_bind_functions_with_nonconst_ref);
-
-  // For methods, we need to be careful for parameter 1.  We do not require
-  // a scoped_refptr because BindState<> itself takes care of AddRef() for
-  // methods. We also disallow binding of an array as the method's target
-  // object.
-  COMPILE_ASSERT(
-      internal::HasIsMethodTag<RunnableType>::value ||
-          !internal::NeedsScopedRefptrButGetsRawPtr<P1>::value,
-      p1_is_refcounted_type_and_needs_scoped_refptr);
-  COMPILE_ASSERT(!internal::HasIsMethodTag<RunnableType>::value ||
-                     !is_array<P1>::value,
-                 first_bound_argument_to_method_cannot_be_array);
-  COMPILE_ASSERT(!internal::NeedsScopedRefptrButGetsRawPtr<P2>::value,
-                 p2_is_refcounted_type_and_needs_scoped_refptr);
-  COMPILE_ASSERT(!internal::NeedsScopedRefptrButGetsRawPtr<P3>::value,
-                 p3_is_refcounted_type_and_needs_scoped_refptr);
-  COMPILE_ASSERT(!internal::NeedsScopedRefptrButGetsRawPtr<P4>::value,
-                 p4_is_refcounted_type_and_needs_scoped_refptr);
-  typedef internal::BindState<RunnableType, RunType,
-      void(typename internal::CallbackParamTraits<P1>::StorageType,
-      typename internal::CallbackParamTraits<P2>::StorageType,
-      typename internal::CallbackParamTraits<P3>::StorageType,
-      typename internal::CallbackParamTraits<P4>::StorageType)> BindState;
-
-
-  return Callback<typename BindState::UnboundRunType>(
-      new BindState(internal::MakeRunnable(functor), p1, p2, p3, p4));
-}
-
-template <typename Functor, typename P1, typename P2, typename P3, typename P4,
-    typename P5>
-butil::Callback<
-    typename internal::BindState<
-        typename internal::FunctorTraits<Functor>::RunnableType,
-        typename internal::FunctorTraits<Functor>::RunType,
-        void(typename internal::CallbackParamTraits<P1>::StorageType,
-            typename internal::CallbackParamTraits<P2>::StorageType,
-            typename internal::CallbackParamTraits<P3>::StorageType,
-            typename internal::CallbackParamTraits<P4>::StorageType,
-            typename internal::CallbackParamTraits<P5>::StorageType)>
-            ::UnboundRunType>
-Bind(Functor functor, const P1& p1, const P2& p2, const P3& p3, const P4& p4,
-    const P5& p5) {
-  // Typedefs for how to store and run the functor.
-  typedef typename internal::FunctorTraits<Functor>::RunnableType RunnableType;
-  typedef typename internal::FunctorTraits<Functor>::RunType RunType;
-
-  // Use RunnableType::RunType instead of RunType above because our
-  // checks should below for bound references need to know what the actual
-  // functor is going to interpret the argument as.
-  typedef internal::FunctionTraits<typename RunnableType::RunType>
-      BoundFunctorTraits;
-
-  // Do not allow binding a non-const reference parameter. Non-const reference
-  // parameters are disallowed by the Google style guide.  Also, binding a
-  // non-const reference parameter can make for subtle bugs because the
-  // invoked function will receive a reference to the stored copy of the
-  // argument and not the original.
-  COMPILE_ASSERT(
-      !(is_non_const_reference<typename BoundFunctorTraits::A1Type>::value ||
-          is_non_const_reference<typename BoundFunctorTraits::A2Type>::value ||
-          is_non_const_reference<typename BoundFunctorTraits::A3Type>::value ||
-          is_non_const_reference<typename BoundFunctorTraits::A4Type>::value ||
-          is_non_const_reference<typename BoundFunctorTraits::A5Type>::value ),
-      do_not_bind_functions_with_nonconst_ref);
-
-  // For methods, we need to be careful for parameter 1.  We do not require
-  // a scoped_refptr because BindState<> itself takes care of AddRef() for
-  // methods. We also disallow binding of an array as the method's target
-  // object.
-  COMPILE_ASSERT(
-      internal::HasIsMethodTag<RunnableType>::value ||
-          !internal::NeedsScopedRefptrButGetsRawPtr<P1>::value,
-      p1_is_refcounted_type_and_needs_scoped_refptr);
-  COMPILE_ASSERT(!internal::HasIsMethodTag<RunnableType>::value ||
-                     !is_array<P1>::value,
-                 first_bound_argument_to_method_cannot_be_array);
-  COMPILE_ASSERT(!internal::NeedsScopedRefptrButGetsRawPtr<P2>::value,
-                 p2_is_refcounted_type_and_needs_scoped_refptr);
-  COMPILE_ASSERT(!internal::NeedsScopedRefptrButGetsRawPtr<P3>::value,
-                 p3_is_refcounted_type_and_needs_scoped_refptr);
-  COMPILE_ASSERT(!internal::NeedsScopedRefptrButGetsRawPtr<P4>::value,
-                 p4_is_refcounted_type_and_needs_scoped_refptr);
-  COMPILE_ASSERT(!internal::NeedsScopedRefptrButGetsRawPtr<P5>::value,
-                 p5_is_refcounted_type_and_needs_scoped_refptr);
-  typedef internal::BindState<RunnableType, RunType,
-      void(typename internal::CallbackParamTraits<P1>::StorageType,
-      typename internal::CallbackParamTraits<P2>::StorageType,
-      typename internal::CallbackParamTraits<P3>::StorageType,
-      typename internal::CallbackParamTraits<P4>::StorageType,
-      typename internal::CallbackParamTraits<P5>::StorageType)> BindState;
-
-
-  return Callback<typename BindState::UnboundRunType>(
-      new BindState(internal::MakeRunnable(functor), p1, p2, p3, p4, p5));
-}
-
-template <typename Functor, typename P1, typename P2, typename P3, typename P4,
-    typename P5, typename P6>
-butil::Callback<
-    typename internal::BindState<
-        typename internal::FunctorTraits<Functor>::RunnableType,
-        typename internal::FunctorTraits<Functor>::RunType,
-        void(typename internal::CallbackParamTraits<P1>::StorageType,
-            typename internal::CallbackParamTraits<P2>::StorageType,
-            typename internal::CallbackParamTraits<P3>::StorageType,
-            typename internal::CallbackParamTraits<P4>::StorageType,
-            typename internal::CallbackParamTraits<P5>::StorageType,
-            typename internal::CallbackParamTraits<P6>::StorageType)>
-            ::UnboundRunType>
-Bind(Functor functor, const P1& p1, const P2& p2, const P3& p3, const P4& p4,
-    const P5& p5, const P6& p6) {
-  // Typedefs for how to store and run the functor.
-  typedef typename internal::FunctorTraits<Functor>::RunnableType RunnableType;
-  typedef typename internal::FunctorTraits<Functor>::RunType RunType;
-
-  // Use RunnableType::RunType instead of RunType above because our
-  // checks should below for bound references need to know what the actual
-  // functor is going to interpret the argument as.
-  typedef internal::FunctionTraits<typename RunnableType::RunType>
-      BoundFunctorTraits;
-
-  // Do not allow binding a non-const reference parameter. Non-const reference
-  // parameters are disallowed by the Google style guide.  Also, binding a
-  // non-const reference parameter can make for subtle bugs because the
-  // invoked function will receive a reference to the stored copy of the
-  // argument and not the original.
-  COMPILE_ASSERT(
-      !(is_non_const_reference<typename BoundFunctorTraits::A1Type>::value ||
-          is_non_const_reference<typename BoundFunctorTraits::A2Type>::value ||
-          is_non_const_reference<typename BoundFunctorTraits::A3Type>::value ||
-          is_non_const_reference<typename BoundFunctorTraits::A4Type>::value ||
-          is_non_const_reference<typename BoundFunctorTraits::A5Type>::value ||
-          is_non_const_reference<typename BoundFunctorTraits::A6Type>::value ),
-      do_not_bind_functions_with_nonconst_ref);
-
-  // For methods, we need to be careful for parameter 1.  We do not require
-  // a scoped_refptr because BindState<> itself takes care of AddRef() for
-  // methods. We also disallow binding of an array as the method's target
-  // object.
-  COMPILE_ASSERT(
-      internal::HasIsMethodTag<RunnableType>::value ||
-          !internal::NeedsScopedRefptrButGetsRawPtr<P1>::value,
-      p1_is_refcounted_type_and_needs_scoped_refptr);
-  COMPILE_ASSERT(!internal::HasIsMethodTag<RunnableType>::value ||
-                     !is_array<P1>::value,
-                 first_bound_argument_to_method_cannot_be_array);
-  COMPILE_ASSERT(!internal::NeedsScopedRefptrButGetsRawPtr<P2>::value,
-                 p2_is_refcounted_type_and_needs_scoped_refptr);
-  COMPILE_ASSERT(!internal::NeedsScopedRefptrButGetsRawPtr<P3>::value,
-                 p3_is_refcounted_type_and_needs_scoped_refptr);
-  COMPILE_ASSERT(!internal::NeedsScopedRefptrButGetsRawPtr<P4>::value,
-                 p4_is_refcounted_type_and_needs_scoped_refptr);
-  COMPILE_ASSERT(!internal::NeedsScopedRefptrButGetsRawPtr<P5>::value,
-                 p5_is_refcounted_type_and_needs_scoped_refptr);
-  COMPILE_ASSERT(!internal::NeedsScopedRefptrButGetsRawPtr<P6>::value,
-                 p6_is_refcounted_type_and_needs_scoped_refptr);
-  typedef internal::BindState<RunnableType, RunType,
-      void(typename internal::CallbackParamTraits<P1>::StorageType,
-      typename internal::CallbackParamTraits<P2>::StorageType,
-      typename internal::CallbackParamTraits<P3>::StorageType,
-      typename internal::CallbackParamTraits<P4>::StorageType,
-      typename internal::CallbackParamTraits<P5>::StorageType,
-      typename internal::CallbackParamTraits<P6>::StorageType)> BindState;
-
-
-  return Callback<typename BindState::UnboundRunType>(
-      new BindState(internal::MakeRunnable(functor), p1, p2, p3, p4, p5, p6));
-}
-
-template <typename Functor, typename P1, typename P2, typename P3, typename P4,
-    typename P5, typename P6, typename P7>
-butil::Callback<
-    typename internal::BindState<
-        typename internal::FunctorTraits<Functor>::RunnableType,
-        typename internal::FunctorTraits<Functor>::RunType,
-        void(typename internal::CallbackParamTraits<P1>::StorageType,
-            typename internal::CallbackParamTraits<P2>::StorageType,
-            typename internal::CallbackParamTraits<P3>::StorageType,
-            typename internal::CallbackParamTraits<P4>::StorageType,
-            typename internal::CallbackParamTraits<P5>::StorageType,
-            typename internal::CallbackParamTraits<P6>::StorageType,
-            typename internal::CallbackParamTraits<P7>::StorageType)>
-            ::UnboundRunType>
-Bind(Functor functor, const P1& p1, const P2& p2, const P3& p3, const P4& p4,
-    const P5& p5, const P6& p6, const P7& p7) {
-  // Typedefs for how to store and run the functor.
-  typedef typename internal::FunctorTraits<Functor>::RunnableType RunnableType;
-  typedef typename internal::FunctorTraits<Functor>::RunType RunType;
-
-  // Use RunnableType::RunType instead of RunType above because our
-  // checks should below for bound references need to know what the actual
-  // functor is going to interpret the argument as.
-  typedef internal::FunctionTraits<typename RunnableType::RunType>
-      BoundFunctorTraits;
-
-  // Do not allow binding a non-const reference parameter. Non-const reference
-  // parameters are disallowed by the Google style guide.  Also, binding a
-  // non-const reference parameter can make for subtle bugs because the
-  // invoked function will receive a reference to the stored copy of the
-  // argument and not the original.
-  COMPILE_ASSERT(
-      !(is_non_const_reference<typename BoundFunctorTraits::A1Type>::value ||
-          is_non_const_reference<typename BoundFunctorTraits::A2Type>::value ||
-          is_non_const_reference<typename BoundFunctorTraits::A3Type>::value ||
-          is_non_const_reference<typename BoundFunctorTraits::A4Type>::value ||
-          is_non_const_reference<typename BoundFunctorTraits::A5Type>::value ||
-          is_non_const_reference<typename BoundFunctorTraits::A6Type>::value ||
-          is_non_const_reference<typename BoundFunctorTraits::A7Type>::value ),
-      do_not_bind_functions_with_nonconst_ref);
-
-  // For methods, we need to be careful for parameter 1.  We do not require
-  // a scoped_refptr because BindState<> itself takes care of AddRef() for
-  // methods. We also disallow binding of an array as the method's target
-  // object.
-  COMPILE_ASSERT(
-      internal::HasIsMethodTag<RunnableType>::value ||
-          !internal::NeedsScopedRefptrButGetsRawPtr<P1>::value,
-      p1_is_refcounted_type_and_needs_scoped_refptr);
-  COMPILE_ASSERT(!internal::HasIsMethodTag<RunnableType>::value ||
-                     !is_array<P1>::value,
-                 first_bound_argument_to_method_cannot_be_array);
-  COMPILE_ASSERT(!internal::NeedsScopedRefptrButGetsRawPtr<P2>::value,
-                 p2_is_refcounted_type_and_needs_scoped_refptr);
-  COMPILE_ASSERT(!internal::NeedsScopedRefptrButGetsRawPtr<P3>::value,
-                 p3_is_refcounted_type_and_needs_scoped_refptr);
-  COMPILE_ASSERT(!internal::NeedsScopedRefptrButGetsRawPtr<P4>::value,
-                 p4_is_refcounted_type_and_needs_scoped_refptr);
-  COMPILE_ASSERT(!internal::NeedsScopedRefptrButGetsRawPtr<P5>::value,
-                 p5_is_refcounted_type_and_needs_scoped_refptr);
-  COMPILE_ASSERT(!internal::NeedsScopedRefptrButGetsRawPtr<P6>::value,
-                 p6_is_refcounted_type_and_needs_scoped_refptr);
-  COMPILE_ASSERT(!internal::NeedsScopedRefptrButGetsRawPtr<P7>::value,
-                 p7_is_refcounted_type_and_needs_scoped_refptr);
-  typedef internal::BindState<RunnableType, RunType,
-      void(typename internal::CallbackParamTraits<P1>::StorageType,
-      typename internal::CallbackParamTraits<P2>::StorageType,
-      typename internal::CallbackParamTraits<P3>::StorageType,
-      typename internal::CallbackParamTraits<P4>::StorageType,
-      typename internal::CallbackParamTraits<P5>::StorageType,
-      typename internal::CallbackParamTraits<P6>::StorageType,
-      typename internal::CallbackParamTraits<P7>::StorageType)> BindState;
-
-
-  return Callback<typename BindState::UnboundRunType>(
-      new BindState(internal::MakeRunnable(functor), p1, p2, p3, p4, p5, p6,
-          p7));
-}
-
-}  // namespace butil
-
-#endif  // BASE_BIND_H_

src/butil/bind_helpers.cc

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "butil/bind_helpers.h"
-
-#include "butil/callback.h"
-
-namespace butil {
-
-void DoNothing() {
-}
-
-}  // namespace butil

src/butil/bind_helpers.h

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// This defines a set of argument wrappers and related factory methods that
-// can be used specify the refcounting and reference semantics of arguments
-// that are bound by the Bind() function in butil/bind.h.
-//
-// It also defines a set of simple functions and utilities that people want
-// when using Callback<> and Bind().
-//
-//
-// ARGUMENT BINDING WRAPPERS
-//
-// The wrapper functions are butil::Unretained(), butil::Owned(), butil::Passed(),
-// butil::ConstRef(), and butil::IgnoreResult().
-//
-// Unretained() allows Bind() to bind a non-refcounted class, and to disable
-// refcounting on arguments that are refcounted objects.
-//
-// Owned() transfers ownership of an object to the Callback resulting from
-// bind; the object will be deleted when the Callback is deleted.
-//
-// Passed() is for transferring movable-but-not-copyable types (eg. scoped_ptr)
-// through a Callback. Logically, this signifies a destructive transfer of
-// the state of the argument into the target function.  Invoking
-// Callback::Run() twice on a Callback that was created with a Passed()
-// argument will CHECK() because the first invocation would have already
-// transferred ownership to the target function.
-//
-// ConstRef() allows binding a constant reference to an argument rather
-// than a copy.
-//
-// IgnoreResult() is used to adapt a function or Callback with a return type to
-// one with a void return. This is most useful if you have a function with,
-// say, a pesky ignorable bool return that you want to use with PostTask or
-// something else that expect a Callback with a void return.
-//
-// EXAMPLE OF Unretained():
-//
-//   class Foo {
-//    public:
-//     void func() { cout << "Foo:f" << endl; }
-//   };
-//
-//   // In some function somewhere.
-//   Foo foo;
-//   Closure foo_callback =
-//       Bind(&Foo::func, Unretained(&foo));
-//   foo_callback.Run();  // Prints "Foo:f".
-//
-// Without the Unretained() wrapper on |&foo|, the above call would fail
-// to compile because Foo does not support the AddRef() and Release() methods.
-//
-//
-// EXAMPLE OF Owned():
-//
-//   void foo(int* arg) { cout << *arg << endl }
-//
-//   int* pn = new int(1);
-//   Closure foo_callback = Bind(&foo, Owned(pn));
-//
-//   foo_callback.Run();  // Prints "1"
-//   foo_callback.Run();  // Prints "1"
-//   *n = 2;
-//   foo_callback.Run();  // Prints "2"
-//
-//   foo_callback.Reset();  // |pn| is deleted.  Also will happen when
-//                          // |foo_callback| goes out of scope.
-//
-// Without Owned(), someone would have to know to delete |pn| when the last
-// reference to the Callback is deleted.
-//
-//
-// EXAMPLE OF ConstRef():
-//
-//   void foo(int arg) { cout << arg << endl }
-//
-//   int n = 1;
-//   Closure no_ref = Bind(&foo, n);
-//   Closure has_ref = Bind(&foo, ConstRef(n));
-//
-//   no_ref.Run();  // Prints "1"
-//   has_ref.Run();  // Prints "1"
-//
-//   n = 2;
-//   no_ref.Run();  // Prints "1"
-//   has_ref.Run();  // Prints "2"
-//
-// Note that because ConstRef() takes a reference on |n|, |n| must outlive all
-// its bound callbacks.
-//
-//
-// EXAMPLE OF IgnoreResult():
-//
-//   int DoSomething(int arg) { cout << arg << endl; }
-//
-//   // Assign to a Callback with a void return type.
-//   Callback<void(int)> cb = Bind(IgnoreResult(&DoSomething));
-//   cb->Run(1);  // Prints "1".
-//
-//   // Prints "1" on |ml|.
-//   ml->PostTask(FROM_HERE, Bind(IgnoreResult(&DoSomething), 1);
-//
-//
-// EXAMPLE OF Passed():
-//
-//   void TakesOwnership(scoped_ptr<Foo> arg) { }
-//   scoped_ptr<Foo> CreateFoo() { return scoped_ptr<Foo>(new Foo()); }
-//
-//   scoped_ptr<Foo> f(new Foo());
-//
-//   // |cb| is given ownership of Foo(). |f| is now NULL.
-//   // You can use f.Pass() in place of &f, but it's more verbose.
-//   Closure cb = Bind(&TakesOwnership, Passed(&f));
-//
-//   // Run was never called so |cb| still owns Foo() and deletes
-//   // it on Reset().
-//   cb.Reset();
-//
-//   // |cb| is given a new Foo created by CreateFoo().
-//   cb = Bind(&TakesOwnership, Passed(CreateFoo()));
-//
-//   // |arg| in TakesOwnership() is given ownership of Foo(). |cb|
-//   // no longer owns Foo() and, if reset, would not delete Foo().
-//   cb.Run();  // Foo() is now transferred to |arg| and deleted.
-//   cb.Run();  // This CHECK()s since Foo() already been used once.
-//
-// Passed() is particularly useful with PostTask() when you are transferring
-// ownership of an argument into a task, but don't necessarily know if the
-// task will always be executed. This can happen if the task is cancellable
-// or if it is posted to a MessageLoopProxy.
-//
-//
-// SIMPLE FUNCTIONS AND UTILITIES.
-//
-//   DoNothing() - Useful for creating a Closure that does nothing when called.
-//   DeletePointer<T>() - Useful for creating a Closure that will delete a
-//                        pointer when invoked. Only use this when necessary.
-//                        In most cases MessageLoop::DeleteSoon() is a better
-//                        fit.
-
-#ifndef BASE_BIND_HELPERS_H_
-#define BASE_BIND_HELPERS_H_
-
-#include "butil/basictypes.h"
-#include "butil/callback.h"
-#include "butil/memory/weak_ptr.h"
-#include "butil/type_traits.h"
-
-namespace butil {
-namespace internal {
-
-// Use the Substitution Failure Is Not An Error (SFINAE) trick to inspect T
-// for the existence of AddRef() and Release() functions of the correct
-// signature.
-//
-// http://en.wikipedia.org/wiki/Substitution_failure_is_not_an_error
-// http://stackoverflow.com/questions/257288/is-it-possible-to-write-a-c-template-to-check-for-a-functions-existence
-// http://stackoverflow.com/questions/4358584/sfinae-approach-comparison
-// http://stackoverflow.com/questions/1966362/sfinae-to-check-for-inherited-member-functions
-//
-// The last link in particular show the method used below.
-//
-// For SFINAE to work with inherited methods, we need to pull some extra tricks
-// with multiple inheritance.  In the more standard formulation, the overloads
-// of Check would be:
-//
-//   template <typename C>
-//   Yes NotTheCheckWeWant(Helper<&C::TargetFunc>*);
-//
-//   template <typename C>
-//   No NotTheCheckWeWant(...);
-//
-//   static const bool value = sizeof(NotTheCheckWeWant<T>(0)) == sizeof(Yes);
-//
-// The problem here is that template resolution will not match
-// C::TargetFunc if TargetFunc does not exist directly in C.  That is, if
-// TargetFunc in inherited from an ancestor, &C::TargetFunc will not match,
-// |value| will be false.  This formulation only checks for whether or
-// not TargetFunc exist directly in the class being introspected.
-//
-// To get around this, we play a dirty trick with multiple inheritance.
-// First, We create a class BaseMixin that declares each function that we
-// want to probe for.  Then we create a class Base that inherits from both T
-// (the class we wish to probe) and BaseMixin.  Note that the function
-// signature in BaseMixin does not need to match the signature of the function
-// we are probing for; thus it's easiest to just use void(void).
-//
-// Now, if TargetFunc exists somewhere in T, then &Base::TargetFunc has an
-// ambiguous resolution between BaseMixin and T.  This lets us write the
-// following:
-//
-//   template <typename C>
-//   No GoodCheck(Helper<&C::TargetFunc>*);
-//
-//   template <typename C>
-//   Yes GoodCheck(...);
-//
-//   static const bool value = sizeof(GoodCheck<Base>(0)) == sizeof(Yes);
-//
-// Notice here that the variadic version of GoodCheck() returns Yes here
-// instead of No like the previous one. Also notice that we calculate |value|
-// by specializing GoodCheck() on Base instead of T.
-//
-// We've reversed the roles of the variadic, and Helper overloads.
-// GoodCheck(Helper<&C::TargetFunc>*), when C = Base, fails to be a valid
-// substitution if T::TargetFunc exists. Thus GoodCheck<Base>(0) will resolve
-// to the variadic version if T has TargetFunc.  If T::TargetFunc does not
-// exist, then &C::TargetFunc is not ambiguous, and the overload resolution
-// will prefer GoodCheck(Helper<&C::TargetFunc>*).
-//
-// This method of SFINAE will correctly probe for inherited names, but it cannot
-// typecheck those names.  It's still a good enough sanity check though.
-//
-// Works on gcc-4.2, gcc-4.4, and Visual Studio 2008.
-//
-// TODO(ajwong): Move to ref_counted.h or type_traits.h when we've vetted
-// this works well.
-//
-// TODO(ajwong): Make this check for Release() as well.
-// See http://crbug.com/82038.
-template <typename T>
-class SupportsAddRefAndRelease {
-  typedef char Yes[1];
-  typedef char No[2];
-
-  struct BaseMixin {
-    void AddRef();
-  };
-
-// MSVC warns when you try to use Base if T has a private destructor, the
-// common pattern for refcounted types. It does this even though no attempt to
-// instantiate Base is made.  We disable the warning for this definition.
-#if defined(OS_WIN)
-#pragma warning(push)
-#pragma warning(disable:4624)
-#endif
-  struct Base : public T, public BaseMixin {
-  };
-#if defined(OS_WIN)
-#pragma warning(pop)
-#endif
-
-  template <void(BaseMixin::*)(void)> struct Helper {};
-
-  template <typename C>
-  static No& Check(Helper<&C::AddRef>*);
-
-  template <typename >
-  static Yes& Check(...);
-
- public:
-  static const bool value = sizeof(Check<Base>(0)) == sizeof(Yes);
-};
-
-// Helpers to assert that arguments of a recounted type are bound with a
-// scoped_refptr.
-template <bool IsClasstype, typename T>
-struct UnsafeBindtoRefCountedArgHelper : false_type {
-};
-
-template <typename T>
-struct UnsafeBindtoRefCountedArgHelper<true, T>
-    : integral_constant<bool, SupportsAddRefAndRelease<T>::value> {
-};
-
-template <typename T>
-struct UnsafeBindtoRefCountedArg : false_type {
-};
-
-template <typename T>
-struct UnsafeBindtoRefCountedArg<T*>
-    : UnsafeBindtoRefCountedArgHelper<is_class<T>::value, T> {
-};
-
-template <typename T>
-class HasIsMethodTag {
-  typedef char Yes[1];
-  typedef char No[2];
-
-  template <typename U>
-  static Yes& Check(typename U::IsMethod*);
-
-  template <typename U>
-  static No& Check(...);
-
- public:
-  static const bool value = sizeof(Check<T>(0)) == sizeof(Yes);
-};
-
-template <typename T>
-class UnretainedWrapper {
- public:
-  explicit UnretainedWrapper(T* o) : ptr_(o) {}
-  T* get() const { return ptr_; }
- private:
-  T* ptr_;
-};
-
-template <typename T>
-class ConstRefWrapper {
- public:
-  explicit ConstRefWrapper(const T& o) : ptr_(&o) {}
-  const T& get() const { return *ptr_; }
- private:
-  const T* ptr_;
-};
-
-template <typename T>
-struct IgnoreResultHelper {
-  explicit IgnoreResultHelper(T functor) : functor_(functor) {}
-
-  T functor_;
-};
-
-template <typename T>
-struct IgnoreResultHelper<Callback<T> > {
-  explicit IgnoreResultHelper(const Callback<T>& functor) : functor_(functor) {}
-
-  const Callback<T>& functor_;
-};
-
-// An alternate implementation is to avoid the destructive copy, and instead
-// specialize ParamTraits<> for OwnedWrapper<> to change the StorageType to
-// a class that is essentially a scoped_ptr<>.
-//
-// The current implementation has the benefit though of leaving ParamTraits<>
-// fully in callback_internal.h as well as avoiding type conversions during
-// storage.
-template <typename T>
-class OwnedWrapper {
- public:
-  explicit OwnedWrapper(T* o) : ptr_(o) {}
-  ~OwnedWrapper() { delete ptr_; }
-  T* get() const { return ptr_; }
-  OwnedWrapper(const OwnedWrapper& other) {
-    ptr_ = other.ptr_;
-    other.ptr_ = NULL;
-  }
-
- private:
-  mutable T* ptr_;
-};
-
-// PassedWrapper is a copyable adapter for a scoper that ignores const.
-//
-// It is needed to get around the fact that Bind() takes a const reference to
-// all its arguments.  Because Bind() takes a const reference to avoid
-// unnecessary copies, it is incompatible with movable-but-not-copyable
-// types; doing a destructive "move" of the type into Bind() would violate
-// the const correctness.
-//
-// This conundrum cannot be solved without either C++11 rvalue references or
-// a O(2^n) blowup of Bind() templates to handle each combination of regular
-// types and movable-but-not-copyable types.  Thus we introduce a wrapper type
-// that is copyable to transmit the correct type information down into
-// BindState<>. Ignoring const in this type makes sense because it is only
-// created when we are explicitly trying to do a destructive move.
-//
-// Two notes:
-//  1) PassedWrapper supports any type that has a "Pass()" function.
-//     This is intentional. The whitelisting of which specific types we
-//     support is maintained by CallbackParamTraits<>.
-//  2) is_valid_ is distinct from NULL because it is valid to bind a "NULL"
-//     scoper to a Callback and allow the Callback to execute once.
-template <typename T>
-class PassedWrapper {
- public:
-  explicit PassedWrapper(T scoper) : is_valid_(true), scoper_(scoper.Pass()) {}
-  PassedWrapper(const PassedWrapper& other)
-      : is_valid_(other.is_valid_), scoper_(other.scoper_.Pass()) {
-  }
-  T Pass() const {
-    CHECK(is_valid_);
-    is_valid_ = false;
-    return scoper_.Pass();
-  }
-
- private:
-  mutable bool is_valid_;
-  mutable T scoper_;
-};
-
-// Unwrap the stored parameters for the wrappers above.
-template <typename T>
-struct UnwrapTraits {
-  typedef const T& ForwardType;
-  static ForwardType Unwrap(const T& o) { return o; }
-};
-
-template <typename T>
-struct UnwrapTraits<UnretainedWrapper<T> > {
-  typedef T* ForwardType;
-  static ForwardType Unwrap(UnretainedWrapper<T> unretained) {
-    return unretained.get();
-  }
-};
-
-template <typename T>
-struct UnwrapTraits<ConstRefWrapper<T> > {
-  typedef const T& ForwardType;
-  static ForwardType Unwrap(ConstRefWrapper<T> const_ref) {
-    return const_ref.get();
-  }
-};
-
-template <typename T>
-struct UnwrapTraits<scoped_refptr<T> > {
-  typedef T* ForwardType;
-  static ForwardType Unwrap(const scoped_refptr<T>& o) { return o.get(); }
-};
-
-template <typename T>
-struct UnwrapTraits<WeakPtr<T> > {
-  typedef const WeakPtr<T>& ForwardType;
-  static ForwardType Unwrap(const WeakPtr<T>& o) { return o; }
-};
-
-template <typename T>
-struct UnwrapTraits<OwnedWrapper<T> > {
-  typedef T* ForwardType;
-  static ForwardType Unwrap(const OwnedWrapper<T>& o) {
-    return o.get();
-  }
-};
-
-template <typename T>
-struct UnwrapTraits<PassedWrapper<T> > {
-  typedef T ForwardType;
-  static T Unwrap(PassedWrapper<T>& o) {
-    return o.Pass();
-  }
-};
-
-// Utility for handling different refcounting semantics in the Bind()
-// function.
-template <bool is_method, typename T>
-struct MaybeRefcount;
-
-template <typename T>
-struct MaybeRefcount<false, T> {
-  static void AddRef(const T&) {}
-  static void Release(const T&) {}
-};
-
-template <typename T, size_t n>
-struct MaybeRefcount<false, T[n]> {
-  static void AddRef(const T*) {}
-  static void Release(const T*) {}
-};
-
-template <typename T>
-struct MaybeRefcount<true, T> {
-  static void AddRef(const T&) {}
-  static void Release(const T&) {}
-};
-
-template <typename T>
-struct MaybeRefcount<true, T*> {
-  static void AddRef(T* o) { o->AddRef(); }
-  static void Release(T* o) { o->Release(); }
-};
-
-// No need to additionally AddRef() and Release() since we are storing a
-// scoped_refptr<> inside the storage object already.
-template <typename T>
-struct MaybeRefcount<true, scoped_refptr<T> > {
-  static void AddRef(const scoped_refptr<T>& o) {}
-  static void Release(const scoped_refptr<T>& o) {}
-};
-
-template <typename T>
-struct MaybeRefcount<true, const T*> {
-  static void AddRef(const T* o) { o->AddRef(); }
-  static void Release(const T* o) { o->Release(); }
-};
-
-// IsWeakMethod is a helper that determine if we are binding a WeakPtr<> to a
-// method.  It is used internally by Bind() to select the correct
-// InvokeHelper that will no-op itself in the event the WeakPtr<> for
-// the target object is invalidated.
-//
-// P1 should be the type of the object that will be received of the method.
-template <bool IsMethod, typename P1>
-struct IsWeakMethod : public false_type {};
-
-template <typename T>
-struct IsWeakMethod<true, WeakPtr<T> > : public true_type {};
-
-template <typename T>
-struct IsWeakMethod<true, ConstRefWrapper<WeakPtr<T> > > : public true_type {};
-
-}  // namespace internal
-
-template <typename T>
-static inline internal::UnretainedWrapper<T> Unretained(T* o) {
-  return internal::UnretainedWrapper<T>(o);
-}
-
-template <typename T>
-static inline internal::ConstRefWrapper<T> ConstRef(const T& o) {
-  return internal::ConstRefWrapper<T>(o);
-}
-
-template <typename T>
-static inline internal::OwnedWrapper<T> Owned(T* o) {
-  return internal::OwnedWrapper<T>(o);
-}
-
-// We offer 2 syntaxes for calling Passed().  The first takes a temporary and
-// is best suited for use with the return value of a function. The second
-// takes a pointer to the scoper and is just syntactic sugar to avoid having
-// to write Passed(scoper.Pass()).
-template <typename T>
-static inline internal::PassedWrapper<T> Passed(T scoper) {
-  return internal::PassedWrapper<T>(scoper.Pass());
-}
-template <typename T>
-static inline internal::PassedWrapper<T> Passed(T* scoper) {
-  return internal::PassedWrapper<T>(scoper->Pass());
-}
-
-template <typename T>
-static inline internal::IgnoreResultHelper<T> IgnoreResult(T data) {
-  return internal::IgnoreResultHelper<T>(data);
-}
-
-template <typename T>
-static inline internal::IgnoreResultHelper<Callback<T> >
-IgnoreResult(const Callback<T>& data) {
-  return internal::IgnoreResultHelper<Callback<T> >(data);
-}
-
-BASE_EXPORT void DoNothing();
-
-template<typename T>
-void DeletePointer(T* obj) {
-  delete obj;
-}
-
-}  // namespace butil
-
-#endif  // BASE_BIND_HELPERS_H_

src/butil/callback.h

-// This file was GENERATED by command:
-//     pump.py callback.h.pump
-// DO NOT EDIT BY HAND!!!
-
-
-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef BASE_CALLBACK_H_
-#define BASE_CALLBACK_H_
-
-#include "butil/callback_forward.h"
-#include "butil/callback_internal.h"
-#include "butil/type_traits.h"
-
-// NOTE: Header files that do not require the full definition of Callback or
-// Closure should #include "butil/callback_forward.h" instead of this file.
-
-// -----------------------------------------------------------------------------
-// Introduction
-// -----------------------------------------------------------------------------
-//
-// The templated Callback class is a generalized function object. Together
-// with the Bind() function in bind.h, they provide a type-safe method for
-// performing partial application of functions.
-//
-// Partial application (or "currying") is the process of binding a subset of
-// a function's arguments to produce another function that takes fewer
-// arguments. This can be used to pass around a unit of delayed execution,
-// much like lexical closures are used in other languages. For example, it
-// is used in Chromium code to schedule tasks on different MessageLoops.
-//
-// A callback with no unbound input parameters (butil::Callback<void(void)>)
-// is called a butil::Closure. Note that this is NOT the same as what other
-// languages refer to as a closure -- it does not retain a reference to its
-// enclosing environment.
-//
-// MEMORY MANAGEMENT AND PASSING
-//
-// The Callback objects themselves should be passed by const-reference, and
-// stored by copy. They internally store their state via a refcounted class
-// and thus do not need to be deleted.
-//
-// The reason to pass via a const-reference is to avoid unnecessary
-// AddRef/Release pairs to the internal state.
-//
-//
-// -----------------------------------------------------------------------------
-// Quick reference for basic stuff
-// -----------------------------------------------------------------------------
-//
-// BINDING A BARE FUNCTION
-//
-//   int Return5() { return 5; }
-//   butil::Callback<int(void)> func_cb = butil::Bind(&Return5);
-//   LOG(INFO) << func_cb.Run();  // Prints 5.
-//
-// BINDING A CLASS METHOD
-//
-//   The first argument to bind is the member function to call, the second is
-//   the object on which to call it.
-//
-//   class Ref : public butil::RefCountedThreadSafe<Ref> {
-//    public:
-//     int Foo() { return 3; }
-//     void PrintBye() { LOG(INFO) << "bye."; }
-//   };
-//   scoped_refptr<Ref> ref = new Ref();
-//   butil::Callback<void(void)> ref_cb = butil::Bind(&Ref::Foo, ref);
-//   LOG(INFO) << ref_cb.Run();  // Prints out 3.
-//
-//   By default the object must support RefCounted or you will get a compiler
-//   error. If you're passing between threads, be sure it's
-//   RefCountedThreadSafe! See "Advanced binding of member functions" below if
-//   you don't want to use reference counting.
-//
-// RUNNING A CALLBACK
-//
-//   Callbacks can be run with their "Run" method, which has the same
-//   signature as the template argument to the callback.
-//
-//   void DoSomething(const butil::Callback<void(int, std::string)>& callback) {
-//     callback.Run(5, "hello");
-//   }
-//
-//   Callbacks can be run more than once (they don't get deleted or marked when
-//   run). However, this precludes using butil::Passed (see below).
-//
-//   void DoSomething(const butil::Callback<double(double)>& callback) {
-//     double myresult = callback.Run(3.14159);
-//     myresult += callback.Run(2.71828);
-//   }
-//
-// PASSING UNBOUND INPUT PARAMETERS
-//
-//   Unbound parameters are specified at the time a callback is Run(). They are
-//   specified in the Callback template type:
-//
-//   void MyFunc(int i, const std::string& str) {}
-//   butil::Callback<void(int, const std::string&)> cb = butil::Bind(&MyFunc);
-//   cb.Run(23, "hello, world");
-//
-// PASSING BOUND INPUT PARAMETERS
-//
-//   Bound parameters are specified when you create thee callback as arguments
-//   to Bind(). They will be passed to the function and the Run()ner of the
-//   callback doesn't see those values or even know that the function it's
-//   calling.
-//
-//   void MyFunc(int i, const std::string& str) {}
-//   butil::Callback<void(void)> cb = butil::Bind(&MyFunc, 23, "hello world");
-//   cb.Run();
-//
-//   A callback with no unbound input parameters (butil::Callback<void(void)>)
-//   is called a butil::Closure. So we could have also written:
-//
-//   butil::Closure cb = butil::Bind(&MyFunc, 23, "hello world");
-//
-//   When calling member functions, bound parameters just go after the object
-//   pointer.
-//
-//   butil::Closure cb = butil::Bind(&MyClass::MyFunc, this, 23, "hello world");
-//
-// PARTIAL BINDING OF PARAMETERS
-//
-//   You can specify some parameters when you create the callback, and specify
-//   the rest when you execute the callback.
-//
-//   void MyFunc(int i, const std::string& str) {}
-//   butil::Callback<void(const std::string&)> cb = butil::Bind(&MyFunc, 23);
-//   cb.Run("hello world");
-//
-//   When calling a function bound parameters are first, followed by unbound
-//   parameters.
-//
-//
-// -----------------------------------------------------------------------------
-// Quick reference for advanced binding
-// -----------------------------------------------------------------------------
-//
-// BINDING A CLASS METHOD WITH WEAK POINTERS
-//
-//   butil::Bind(&MyClass::Foo, GetWeakPtr());
-//
-//   The callback will not be run if the object has already been destroyed.
-//   DANGER: weak pointers are not threadsafe, so don't use this
-//   when passing between threads!
-//
-// BINDING A CLASS METHOD WITH MANUAL LIFETIME MANAGEMENT
-//
-//   butil::Bind(&MyClass::Foo, butil::Unretained(this));
-//
-//   This disables all lifetime management on the object. You're responsible
-//   for making sure the object is alive at the time of the call. You break it,
-//   you own it!
-//
-// BINDING A CLASS METHOD AND HAVING THE CALLBACK OWN THE CLASS
-//
-//   MyClass* myclass = new MyClass;
-//   butil::Bind(&MyClass::Foo, butil::Owned(myclass));
-//
-//   The object will be deleted when the callback is destroyed, even if it's
-//   not run (like if you post a task during shutdown). Potentially useful for
-//   "fire and forget" cases.
-//
-// IGNORING RETURN VALUES
-//
-//   Sometimes you want to call a function that returns a value in a callback
-//   that doesn't expect a return value.
-//
-//   int DoSomething(int arg) { cout << arg << endl; }
-//   butil::Callback<void<int>) cb =
-//       butil::Bind(butil::IgnoreResult(&DoSomething));
-//
-//
-// -----------------------------------------------------------------------------
-// Quick reference for binding parameters to Bind()
-// -----------------------------------------------------------------------------
-//
-// Bound parameters are specified as arguments to Bind() and are passed to the
-// function. A callback with no parameters or no unbound parameters is called a
-// Closure (butil::Callback<void(void)> and butil::Closure are the same thing).
-//
-// PASSING PARAMETERS OWNED BY THE CALLBACK
-//
-//   void Foo(int* arg) { cout << *arg << endl; }
-//   int* pn = new int(1);
-//   butil::Closure foo_callback = butil::Bind(&foo, butil::Owned(pn));
-//
-//   The parameter will be deleted when the callback is destroyed, even if it's
-//   not run (like if you post a task during shutdown).
-//
-// PASSING PARAMETERS AS A scoped_ptr
-//
-//   void TakesOwnership(scoped_ptr<Foo> arg) {}
-//   scoped_ptr<Foo> f(new Foo);
-//   // f becomes null during the following call.
-//   butil::Closure cb = butil::Bind(&TakesOwnership, butil::Passed(&f));
-//
-//   Ownership of the parameter will be with the callback until the it is run,
-//   when ownership is passed to the callback function. This means the callback
-//   can only be run once. If the callback is never run, it will delete the
-//   object when it's destroyed.
-//
-// PASSING PARAMETERS AS A scoped_refptr
-//
-//   void TakesOneRef(scoped_refptr<Foo> arg) {}
-//   scoped_refptr<Foo> f(new Foo)
-//   butil::Closure cb = butil::Bind(&TakesOneRef, f);
-//
-//   This should "just work." The closure will take a reference as long as it
-//   is alive, and another reference will be taken for the called function.
-//
-// PASSING PARAMETERS BY REFERENCE
-//
-//   Const references are *copied* unless ConstRef is used. Example:
-//
-//   void foo(const int& arg) { printf("%d %p\n", arg, &arg); }
-//   int n = 1;
-//   butil::Closure has_copy = butil::Bind(&foo, n);
-//   butil::Closure has_ref = butil::Bind(&foo, butil::ConstRef(n));
-//   n = 2;
-//   foo(n);                        // Prints "2 0xaaaaaaaaaaaa"
-//   has_copy.Run();                // Prints "1 0xbbbbbbbbbbbb"
-//   has_ref.Run();                 // Prints "2 0xaaaaaaaaaaaa"
-//
-//   Normally parameters are copied in the closure. DANGER: ConstRef stores a
-//   const reference instead, referencing the original parameter. This means
-//   that you must ensure the object outlives the callback!
-//
-//
-// -----------------------------------------------------------------------------
-// Implementation notes
-// -----------------------------------------------------------------------------
-//
-// WHERE IS THIS DESIGN FROM:
-//
-// The design Callback and Bind is heavily influenced by C++'s
-// tr1::function/tr1::bind, and by the "Google Callback" system used inside
-// Google.
-//
-//
-// HOW THE IMPLEMENTATION WORKS:
-//
-// There are three main components to the system:
-//   1) The Callback classes.
-//   2) The Bind() functions.
-//   3) The arguments wrappers (e.g., Unretained() and ConstRef()).
-//
-// The Callback classes represent a generic function pointer. Internally,
-// it stores a refcounted piece of state that represents the target function
-// and all its bound parameters.  Each Callback specialization has a templated
-// constructor that takes an BindState<>*.  In the context of the constructor,
-// the static type of this BindState<> pointer uniquely identifies the
-// function it is representing, all its bound parameters, and a Run() method
-// that is capable of invoking the target.
-//
-// Callback's constructor takes the BindState<>* that has the full static type
-// and erases the target function type as well as the types of the bound
-// parameters.  It does this by storing a pointer to the specific Run()
-// function, and upcasting the state of BindState<>* to a
-// BindStateBase*. This is safe as long as this BindStateBase pointer
-// is only used with the stored Run() pointer.
-//
-// To BindState<> objects are created inside the Bind() functions.
-// These functions, along with a set of internal templates, are responsible for
-//
-//  - Unwrapping the function signature into return type, and parameters
-//  - Determining the number of parameters that are bound
-//  - Creating the BindState storing the bound parameters
-//  - Performing compile-time asserts to avoid error-prone behavior
-//  - Returning an Callback<> with an arity matching the number of unbound
-//    parameters and that knows the correct refcounting semantics for the
-//    target object if we are binding a method.
-//
-// The Bind functions do the above using type-inference, and template
-// specializations.
-//
-// By default Bind() will store copies of all bound parameters, and attempt
-// to refcount a target object if the function being bound is a class method.
-// These copies are created even if the function takes parameters as const
-// references. (Binding to non-const references is forbidden, see bind.h.)
-//
-// To change this behavior, we introduce a set of argument wrappers
-// (e.g., Unretained(), and ConstRef()).  These are simple container templates
-// that are passed by value, and wrap a pointer to argument.  See the
-// file-level comment in butil/bind_helpers.h for more info.
-//
-// These types are passed to the Unwrap() functions, and the MaybeRefcount()
-// functions respectively to modify the behavior of Bind().  The Unwrap()
-// and MaybeRefcount() functions change behavior by doing partial
-// specialization based on whether or not a parameter is a wrapper type.
-//
-// ConstRef() is similar to tr1::cref.  Unretained() is specific to Chromium.
-//
-//
-// WHY NOT TR1 FUNCTION/BIND?
-//
-// Direct use of tr1::function and tr1::bind was considered, but ultimately
-// rejected because of the number of copy constructors invocations involved
-// in the binding of arguments during construction, and the forwarding of
-// arguments during invocation.  These copies will no longer be an issue in
-// C++0x because C++0x will support rvalue reference allowing for the compiler
-// to avoid these copies.  However, waiting for C++0x is not an option.
-//
-// Measured with valgrind on gcc version 4.4.3 (Ubuntu 4.4.3-4ubuntu5), the
-// tr1::bind call itself will invoke a non-trivial copy constructor three times
-// for each bound parameter.  Also, each when passing a tr1::function, each
-// bound argument will be copied again.
-//
-// In addition to the copies taken at binding and invocation, copying a
-// tr1::function causes a copy to be made of all the bound parameters and
-// state.
-//
-// Furthermore, in Chromium, it is desirable for the Callback to take a
-// reference on a target object when representing a class method call.  This
-// is not supported by tr1.
-//
-// Lastly, tr1::function and tr1::bind has a more general and flexible API.
-// This includes things like argument reordering by use of
-// tr1::bind::placeholder, support for non-const reference parameters, and some
-// limited amount of subtyping of the tr1::function object (e.g.,
-// tr1::function<int(int)> is convertible to tr1::function<void(int)>).
-//
-// These are not features that are required in Chromium. Some of them, such as
-// allowing for reference parameters, and subtyping of functions, may actually
-// become a source of errors. Removing support for these features actually
-// allows for a simpler implementation, and a terser Currying API.
-//
-//
-// WHY NOT GOOGLE CALLBACKS?
-//
-// The Google callback system also does not support refcounting.  Furthermore,
-// its implementation has a number of strange edge cases with respect to type
-// conversion of its arguments.  In particular, the argument's constness must
-// at times match exactly the function signature, or the type-inference might
-// break.  Given the above, writing a custom solution was easier.
-//
-//
-// MISSING FUNCTIONALITY
-//  - Invoking the return of Bind.  Bind(&foo).Run() does not work;
-//  - Binding arrays to functions that take a non-const pointer.
-//    Example:
-//      void Foo(const char* ptr);
-//      void Bar(char* ptr);
-//      Bind(&Foo, "test");
-//      Bind(&Bar, "test");  // This fails because ptr is not const.
-
-namespace butil {
-
-// First, we forward declare the Callback class template. This informs the
-// compiler that the template only has 1 type parameter which is the function
-// signature that the Callback is representing.
-//
-// After this, create template specializations for 0-7 parameters. Note that
-// even though the template typelist grows, the specialization still
-// only has one type: the function signature.
-//
-// If you are thinking of forward declaring Callback in your own header file,
-// please include "butil/callback_forward.h" instead.
-template <typename Sig>
-class Callback;
-
-namespace internal {
-template <typename Runnable, typename RunType, typename BoundArgsType>
-struct BindState;
-}  // namespace internal
-
-template <typename R>
-class Callback<R(void)> : public internal::CallbackBase {
- public:
-  typedef R(RunType)();
-
-  Callback() : CallbackBase(NULL) { }
-
-  // Note that this constructor CANNOT be explicit, and that Bind() CANNOT
-  // return the exact Callback<> type.  See butil/bind.h for details.
-  template <typename Runnable, typename BindRunType, typename BoundArgsType>
-  Callback(internal::BindState<Runnable, BindRunType,
-           BoundArgsType>* bind_state)
-      : CallbackBase(bind_state) {
-
-    // Force the assignment to a local variable of PolymorphicInvoke
-    // so the compiler will typecheck that the passed in Run() method has
-    // the correct type.
-    PolymorphicInvoke invoke_func =
-        &internal::BindState<Runnable, BindRunType, BoundArgsType>
-            ::InvokerType::Run;
-    polymorphic_invoke_ = reinterpret_cast<InvokeFuncStorage>(invoke_func);
-  }
-
-  bool Equals(const Callback& other) const {
-    return CallbackBase::Equals(other);
-  }
-
-  R Run() const {
-    PolymorphicInvoke f =
-        reinterpret_cast<PolymorphicInvoke>(polymorphic_invoke_);
-
-    return f(bind_state_.get());
-  }
-
- private:
-  typedef R(*PolymorphicInvoke)(
-      internal::BindStateBase*);
-
-};
-
-template <typename R, typename A1>
-class Callback<R(A1)> : public internal::CallbackBase {
- public:
-  typedef R(RunType)(A1);
-
-  Callback() : CallbackBase(NULL) { }
-
-  // Note that this constructor CANNOT be explicit, and that Bind() CANNOT
-  // return the exact Callback<> type.  See butil/bind.h for details.
-  template <typename Runnable, typename BindRunType, typename BoundArgsType>
-  Callback(internal::BindState<Runnable, BindRunType,
-           BoundArgsType>* bind_state)
-      : CallbackBase(bind_state) {
-
-    // Force the assignment to a local variable of PolymorphicInvoke
-    // so the compiler will typecheck that the passed in Run() method has
-    // the correct type.
-    PolymorphicInvoke invoke_func =
-        &internal::BindState<Runnable, BindRunType, BoundArgsType>
-            ::InvokerType::Run;
-    polymorphic_invoke_ = reinterpret_cast<InvokeFuncStorage>(invoke_func);
-  }
-
-  bool Equals(const Callback& other) const {
-    return CallbackBase::Equals(other);
-  }
-
-  R Run(typename internal::CallbackParamTraits<A1>::ForwardType a1) const {
-    PolymorphicInvoke f =
-        reinterpret_cast<PolymorphicInvoke>(polymorphic_invoke_);
-
-    return f(bind_state_.get(), internal::CallbackForward(a1));
-  }
-
- private:
-  typedef R(*PolymorphicInvoke)(
-      internal::BindStateBase*,
-          typename internal::CallbackParamTraits<A1>::ForwardType);
-
-};
-
-template <typename R, typename A1, typename A2>
-class Callback<R(A1, A2)> : public internal::CallbackBase {
- public:
-  typedef R(RunType)(A1, A2);
-
-  Callback() : CallbackBase(NULL) { }
-
-  // Note that this constructor CANNOT be explicit, and that Bind() CANNOT
-  // return the exact Callback<> type.  See butil/bind.h for details.
-  template <typename Runnable, typename BindRunType, typename BoundArgsType>
-  Callback(internal::BindState<Runnable, BindRunType,
-           BoundArgsType>* bind_state)
-      : CallbackBase(bind_state) {
-
-    // Force the assignment to a local variable of PolymorphicInvoke
-    // so the compiler will typecheck that the passed in Run() method has
-    // the correct type.
-    PolymorphicInvoke invoke_func =
-        &internal::BindState<Runnable, BindRunType, BoundArgsType>
-            ::InvokerType::Run;
-    polymorphic_invoke_ = reinterpret_cast<InvokeFuncStorage>(invoke_func);
-  }
-
-  bool Equals(const Callback& other) const {
-    return CallbackBase::Equals(other);
-  }
-
-  R Run(typename internal::CallbackParamTraits<A1>::ForwardType a1,
-        typename internal::CallbackParamTraits<A2>::ForwardType a2) const {
-    PolymorphicInvoke f =
-        reinterpret_cast<PolymorphicInvoke>(polymorphic_invoke_);
-
-    return f(bind_state_.get(), internal::CallbackForward(a1),
-             internal::CallbackForward(a2));
-  }
-
- private:
-  typedef R(*PolymorphicInvoke)(
-      internal::BindStateBase*,
-          typename internal::CallbackParamTraits<A1>::ForwardType,
-          typename internal::CallbackParamTraits<A2>::ForwardType);
-
-};
-
-template <typename R, typename A1, typename A2, typename A3>
-class Callback<R(A1, A2, A3)> : public internal::CallbackBase {
- public:
-  typedef R(RunType)(A1, A2, A3);
-
-  Callback() : CallbackBase(NULL) { }
-
-  // Note that this constructor CANNOT be explicit, and that Bind() CANNOT
-  // return the exact Callback<> type.  See butil/bind.h for details.
-  template <typename Runnable, typename BindRunType, typename BoundArgsType>
-  Callback(internal::BindState<Runnable, BindRunType,
-           BoundArgsType>* bind_state)
-      : CallbackBase(bind_state) {
-
-    // Force the assignment to a local variable of PolymorphicInvoke
-    // so the compiler will typecheck that the passed in Run() method has
-    // the correct type.
-    PolymorphicInvoke invoke_func =
-        &internal::BindState<Runnable, BindRunType, BoundArgsType>
-            ::InvokerType::Run;
-    polymorphic_invoke_ = reinterpret_cast<InvokeFuncStorage>(invoke_func);
-  }
-
-  bool Equals(const Callback& other) const {
-    return CallbackBase::Equals(other);
-  }
-
-  R Run(typename internal::CallbackParamTraits<A1>::ForwardType a1,
-        typename internal::CallbackParamTraits<A2>::ForwardType a2,
-        typename internal::CallbackParamTraits<A3>::ForwardType a3) const {
-    PolymorphicInvoke f =
-        reinterpret_cast<PolymorphicInvoke>(polymorphic_invoke_);
-
-    return f(bind_state_.get(), internal::CallbackForward(a1),
-             internal::CallbackForward(a2),
-             internal::CallbackForward(a3));
-  }
-
- private:
-  typedef R(*PolymorphicInvoke)(
-      internal::BindStateBase*,
-          typename internal::CallbackParamTraits<A1>::ForwardType,
-          typename internal::CallbackParamTraits<A2>::ForwardType,
-          typename internal::CallbackParamTraits<A3>::ForwardType);
-
-};
-
-template <typename R, typename A1, typename A2, typename A3, typename A4>
-class Callback<R(A1, A2, A3, A4)> : public internal::CallbackBase {
- public:
-  typedef R(RunType)(A1, A2, A3, A4);
-
-  Callback() : CallbackBase(NULL) { }
-
-  // Note that this constructor CANNOT be explicit, and that Bind() CANNOT
-  // return the exact Callback<> type.  See butil/bind.h for details.
-  template <typename Runnable, typename BindRunType, typename BoundArgsType>
-  Callback(internal::BindState<Runnable, BindRunType,
-           BoundArgsType>* bind_state)
-      : CallbackBase(bind_state) {
-
-    // Force the assignment to a local variable of PolymorphicInvoke
-    // so the compiler will typecheck that the passed in Run() method has
-    // the correct type.
-    PolymorphicInvoke invoke_func =
-        &internal::BindState<Runnable, BindRunType, BoundArgsType>
-            ::InvokerType::Run;
-    polymorphic_invoke_ = reinterpret_cast<InvokeFuncStorage>(invoke_func);
-  }
-
-  bool Equals(const Callback& other) const {
-    return CallbackBase::Equals(other);
-  }
-
-  R Run(typename internal::CallbackParamTraits<A1>::ForwardType a1,
-        typename internal::CallbackParamTraits<A2>::ForwardType a2,
-        typename internal::CallbackParamTraits<A3>::ForwardType a3,
-        typename internal::CallbackParamTraits<A4>::ForwardType a4) const {
-    PolymorphicInvoke f =
-        reinterpret_cast<PolymorphicInvoke>(polymorphic_invoke_);
-
-    return f(bind_state_.get(), internal::CallbackForward(a1),
-             internal::CallbackForward(a2),
-             internal::CallbackForward(a3),
-             internal::CallbackForward(a4));
-  }
-
- private:
-  typedef R(*PolymorphicInvoke)(
-      internal::BindStateBase*,
-          typename internal::CallbackParamTraits<A1>::ForwardType,
-          typename internal::CallbackParamTraits<A2>::ForwardType,
-          typename internal::CallbackParamTraits<A3>::ForwardType,
-          typename internal::CallbackParamTraits<A4>::ForwardType);
-
-};
-
-template <typename R, typename A1, typename A2, typename A3, typename A4,
-    typename A5>
-class Callback<R(A1, A2, A3, A4, A5)> : public internal::CallbackBase {
- public:
-  typedef R(RunType)(A1, A2, A3, A4, A5);
-
-  Callback() : CallbackBase(NULL) { }
-
-  // Note that this constructor CANNOT be explicit, and that Bind() CANNOT
-  // return the exact Callback<> type.  See butil/bind.h for details.
-  template <typename Runnable, typename BindRunType, typename BoundArgsType>
-  Callback(internal::BindState<Runnable, BindRunType,
-           BoundArgsType>* bind_state)
-      : CallbackBase(bind_state) {
-
-    // Force the assignment to a local variable of PolymorphicInvoke
-    // so the compiler will typecheck that the passed in Run() method has
-    // the correct type.
-    PolymorphicInvoke invoke_func =
-        &internal::BindState<Runnable, BindRunType, BoundArgsType>
-            ::InvokerType::Run;
-    polymorphic_invoke_ = reinterpret_cast<InvokeFuncStorage>(invoke_func);
-  }
-
-  bool Equals(const Callback& other) const {
-    return CallbackBase::Equals(other);
-  }
-
-  R Run(typename internal::CallbackParamTraits<A1>::ForwardType a1,
-        typename internal::CallbackParamTraits<A2>::ForwardType a2,
-        typename internal::CallbackParamTraits<A3>::ForwardType a3,
-        typename internal::CallbackParamTraits<A4>::ForwardType a4,
-        typename internal::CallbackParamTraits<A5>::ForwardType a5) const {
-    PolymorphicInvoke f =
-        reinterpret_cast<PolymorphicInvoke>(polymorphic_invoke_);
-
-    return f(bind_state_.get(), internal::CallbackForward(a1),
-             internal::CallbackForward(a2),
-             internal::CallbackForward(a3),
-             internal::CallbackForward(a4),
-             internal::CallbackForward(a5));
-  }
-
- private:
-  typedef R(*PolymorphicInvoke)(
-      internal::BindStateBase*,
-          typename internal::CallbackParamTraits<A1>::ForwardType,
-          typename internal::CallbackParamTraits<A2>::ForwardType,
-          typename internal::CallbackParamTraits<A3>::ForwardType,
-          typename internal::CallbackParamTraits<A4>::ForwardType,
-          typename internal::CallbackParamTraits<A5>::ForwardType);
-
-};
-
-template <typename R, typename A1, typename A2, typename A3, typename A4,
-    typename A5, typename A6>
-class Callback<R(A1, A2, A3, A4, A5, A6)> : public internal::CallbackBase {
- public:
-  typedef R(RunType)(A1, A2, A3, A4, A5, A6);
-
-  Callback() : CallbackBase(NULL) { }
-
-  // Note that this constructor CANNOT be explicit, and that Bind() CANNOT
-  // return the exact Callback<> type.  See butil/bind.h for details.
-  template <typename Runnable, typename BindRunType, typename BoundArgsType>
-  Callback(internal::BindState<Runnable, BindRunType,
-           BoundArgsType>* bind_state)
-      : CallbackBase(bind_state) {
-
-    // Force the assignment to a local variable of PolymorphicInvoke
-    // so the compiler will typecheck that the passed in Run() method has
-    // the correct type.
-    PolymorphicInvoke invoke_func =
-        &internal::BindState<Runnable, BindRunType, BoundArgsType>
-            ::InvokerType::Run;
-    polymorphic_invoke_ = reinterpret_cast<InvokeFuncStorage>(invoke_func);
-  }
-
-  bool Equals(const Callback& other) const {
-    return CallbackBase::Equals(other);
-  }
-
-  R Run(typename internal::CallbackParamTraits<A1>::ForwardType a1,
-        typename internal::CallbackParamTraits<A2>::ForwardType a2,
-        typename internal::CallbackParamTraits<A3>::ForwardType a3,
-        typename internal::CallbackParamTraits<A4>::ForwardType a4,
-        typename internal::CallbackParamTraits<A5>::ForwardType a5,
-        typename internal::CallbackParamTraits<A6>::ForwardType a6) const {
-    PolymorphicInvoke f =
-        reinterpret_cast<PolymorphicInvoke>(polymorphic_invoke_);
-
-    return f(bind_state_.get(), internal::CallbackForward(a1),
-             internal::CallbackForward(a2),
-             internal::CallbackForward(a3),
-             internal::CallbackForward(a4),
-             internal::CallbackForward(a5),
-             internal::CallbackForward(a6));
-  }
-
- private:
-  typedef R(*PolymorphicInvoke)(
-      internal::BindStateBase*,
-          typename internal::CallbackParamTraits<A1>::ForwardType,
-          typename internal::CallbackParamTraits<A2>::ForwardType,
-          typename internal::CallbackParamTraits<A3>::ForwardType,
-          typename internal::CallbackParamTraits<A4>::ForwardType,
-          typename internal::CallbackParamTraits<A5>::ForwardType,
-          typename internal::CallbackParamTraits<A6>::ForwardType);
-
-};
-
-template <typename R, typename A1, typename A2, typename A3, typename A4,
-    typename A5, typename A6, typename A7>
-class Callback<R(A1, A2, A3, A4, A5, A6, A7)> : public internal::CallbackBase {
- public:
-  typedef R(RunType)(A1, A2, A3, A4, A5, A6, A7);
-
-  Callback() : CallbackBase(NULL) { }
-
-  // Note that this constructor CANNOT be explicit, and that Bind() CANNOT
-  // return the exact Callback<> type.  See butil/bind.h for details.
-  template <typename Runnable, typename BindRunType, typename BoundArgsType>
-  Callback(internal::BindState<Runnable, BindRunType,
-           BoundArgsType>* bind_state)
-      : CallbackBase(bind_state) {
-
-    // Force the assignment to a local variable of PolymorphicInvoke
-    // so the compiler will typecheck that the passed in Run() method has
-    // the correct type.
-    PolymorphicInvoke invoke_func =
-        &internal::BindState<Runnable, BindRunType, BoundArgsType>
-            ::InvokerType::Run;
-    polymorphic_invoke_ = reinterpret_cast<InvokeFuncStorage>(invoke_func);
-  }
-
-  bool Equals(const Callback& other) const {
-    return CallbackBase::Equals(other);
-  }
-
-  R Run(typename internal::CallbackParamTraits<A1>::ForwardType a1,
-        typename internal::CallbackParamTraits<A2>::ForwardType a2,
-        typename internal::CallbackParamTraits<A3>::ForwardType a3,
-        typename internal::CallbackParamTraits<A4>::ForwardType a4,
-        typename internal::CallbackParamTraits<A5>::ForwardType a5,
-        typename internal::CallbackParamTraits<A6>::ForwardType a6,
-        typename internal::CallbackParamTraits<A7>::ForwardType a7) const {
-    PolymorphicInvoke f =
-        reinterpret_cast<PolymorphicInvoke>(polymorphic_invoke_);
-
-    return f(bind_state_.get(), internal::CallbackForward(a1),
-             internal::CallbackForward(a2),
-             internal::CallbackForward(a3),
-             internal::CallbackForward(a4),
-             internal::CallbackForward(a5),
-             internal::CallbackForward(a6),
-             internal::CallbackForward(a7));
-  }
-
- private:
-  typedef R(*PolymorphicInvoke)(
-      internal::BindStateBase*,
-          typename internal::CallbackParamTraits<A1>::ForwardType,
-          typename internal::CallbackParamTraits<A2>::ForwardType,
-          typename internal::CallbackParamTraits<A3>::ForwardType,
-          typename internal::CallbackParamTraits<A4>::ForwardType,
-          typename internal::CallbackParamTraits<A5>::ForwardType,
-          typename internal::CallbackParamTraits<A6>::ForwardType,
-          typename internal::CallbackParamTraits<A7>::ForwardType);
-
-};
-
-
-// Syntactic sugar to make Callbacks<void(void)> easier to declare since it
-// will be used in a lot of APIs with delayed execution.
-typedef Callback<void(void)> Closure;
-
-}  // namespace butil
-
-#endif  // BASE_CALLBACK_H

src/butil/callback_forward.h

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef BASE_CALLBACK_FORWARD_H_
-#define BASE_CALLBACK_FORWARD_H_
-
-namespace butil {
-
-template <typename Sig>
-class Callback;
-
-typedef Callback<void(void)> Closure;
-
-}  // namespace butil
-
-#endif  // BASE_CALLBACK_FORWARD_H

src/butil/callback_helpers.cc

-// Copyright 2013 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "butil/callback_helpers.h"
-
-#include "butil/callback.h"
-
-namespace butil {
-
-ScopedClosureRunner::ScopedClosureRunner() {
-}
-
-ScopedClosureRunner::ScopedClosureRunner(const Closure& closure)
-    : closure_(closure) {
-}
-
-ScopedClosureRunner::~ScopedClosureRunner() {
-  if (!closure_.is_null())
-    closure_.Run();
-}
-
-void ScopedClosureRunner::Reset() {
-  Closure old_closure = Release();
-  if (!old_closure.is_null())
-    old_closure.Run();
-}
-
-void ScopedClosureRunner::Reset(const Closure& closure) {
-  Closure old_closure = Release();
-  closure_ = closure;
-  if (!old_closure.is_null())
-    old_closure.Run();
-}
-
-Closure ScopedClosureRunner::Release() {
-  Closure result = closure_;
-  closure_.Reset();
-  return result;
-}
-
-}  // namespace butil

src/butil/callback_helpers.h

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// This defines helpful methods for dealing with Callbacks.  Because Callbacks
-// are implemented using templates, with a class per callback signature, adding
-// methods to Callback<> itself is unattractive (lots of extra code gets
-// generated).  Instead, consider adding methods here.
-//
-// ResetAndReturn(&cb) is like cb.Reset() but allows executing a callback (via a
-// copy) after the original callback is Reset().  This can be handy if Run()
-// reads/writes the variable holding the Callback.
-
-#ifndef BASE_CALLBACK_HELPERS_H_
-#define BASE_CALLBACK_HELPERS_H_
-
-#include "butil/basictypes.h"
-#include "butil/callback.h"
-#include "butil/compiler_specific.h"
-
-namespace butil {
-
-template <typename Sig>
-butil::Callback<Sig> ResetAndReturn(butil::Callback<Sig>* cb) {
-  butil::Callback<Sig> ret(*cb);
-  cb->Reset();
-  return ret;
-}
-
-// ScopedClosureRunner is akin to scoped_ptr for Closures. It ensures that the
-// Closure is executed and deleted no matter how the current scope exits.
-class BASE_EXPORT ScopedClosureRunner {
- public:
-  ScopedClosureRunner();
-  explicit ScopedClosureRunner(const Closure& closure);
-  ~ScopedClosureRunner();
-
-  void Reset();
-  void Reset(const Closure& closure);
-  Closure Release() WARN_UNUSED_RESULT;
-
- private:
-  Closure closure_;
-
-  DISALLOW_COPY_AND_ASSIGN(ScopedClosureRunner);
-};
-
-}  // namespace butil
-
-#endif  // BASE_CALLBACK_HELPERS_H_

src/butil/callback_internal.cc

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "butil/callback_internal.h"
-
-#include "butil/logging.h"
-
-namespace butil {
-namespace internal {
-
-bool CallbackBase::is_null() const {
-  return bind_state_.get() == NULL;
-}
-
-void CallbackBase::Reset() {
-  polymorphic_invoke_ = NULL;
-  // NULL the bind_state_ last, since it may be holding the last ref to whatever
-  // object owns us, and we may be deleted after that.
-  bind_state_ = NULL;
-}
-
-bool CallbackBase::Equals(const CallbackBase& other) const {
-  return bind_state_.get() == other.bind_state_.get() &&
-         polymorphic_invoke_ == other.polymorphic_invoke_;
-}
-
-CallbackBase::CallbackBase(BindStateBase* bind_state)
-    : bind_state_(bind_state),
-      polymorphic_invoke_(NULL) {
-  DCHECK(!bind_state_.get() || bind_state_->HasOneRef());
-}
-
-CallbackBase::~CallbackBase() {
-}
-
-}  // namespace internal
-}  // namespace butil

src/butil/callback_internal.h

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// This file contains utility functions and classes that help the
-// implementation, and management of the Callback objects.
-
-#ifndef BASE_CALLBACK_INTERNAL_H_
-#define BASE_CALLBACK_INTERNAL_H_
-
-#include <stddef.h>
-
-#include "butil/base_export.h"
-#include "butil/memory/ref_counted.h"
-#include "butil/memory/scoped_ptr.h"
-
-template <typename T>
-class ScopedVector;
-
-namespace butil {
-namespace internal {
-
-// BindStateBase is used to provide an opaque handle that the Callback
-// class can use to represent a function object with bound arguments.  It
-// behaves as an existential type that is used by a corresponding
-// DoInvoke function to perform the function execution.  This allows
-// us to shield the Callback class from the types of the bound argument via
-// "type erasure."
-class BindStateBase : public RefCountedThreadSafe<BindStateBase> {
- protected:
-  friend class RefCountedThreadSafe<BindStateBase>;
-  virtual ~BindStateBase() {}
-};
-
-// Holds the Callback methods that don't require specialization to reduce
-// template bloat.
-class BASE_EXPORT CallbackBase {
- public:
-  // Returns true if Callback is null (doesn't refer to anything).
-  bool is_null() const;
-
-  // Returns the Callback into an uninitialized state.
-  void Reset();
-
- protected:
-  // In C++, it is safe to cast function pointers to function pointers of
-  // another type. It is not okay to use void*. We create a InvokeFuncStorage
-  // that that can store our function pointer, and then cast it back to
-  // the original type on usage.
-  typedef void(*InvokeFuncStorage)(void);
-
-  // Returns true if this callback equals |other|. |other| may be null.
-  bool Equals(const CallbackBase& other) const;
-
-  // Allow initializing of |bind_state_| via the constructor to avoid default
-  // initialization of the scoped_refptr.  We do not also initialize
-  // |polymorphic_invoke_| here because doing a normal assignment in the
-  // derived Callback templates makes for much nicer compiler errors.
-  explicit CallbackBase(BindStateBase* bind_state);
-
-  // Force the destructor to be instantiated inside this translation unit so
-  // that our subclasses will not get inlined versions.  Avoids more template
-  // bloat.
-  ~CallbackBase();
-
-  scoped_refptr<BindStateBase> bind_state_;
-  InvokeFuncStorage polymorphic_invoke_;
-};
-
-// A helper template to determine if given type is non-const move-only-type,
-// i.e. if a value of the given type should be passed via .Pass() in a
-// destructive way.
-template <typename T> struct IsMoveOnlyType {
-  template <typename U>
-  static YesType Test(const typename U::MoveOnlyTypeForCPP03*);
-
-  template <typename U>
-  static NoType Test(...);
-
-  static const bool value = sizeof(Test<T>(0)) == sizeof(YesType) &&
-                            !is_const<T>::value;
-};
-
-// This is a typetraits object that's used to take an argument type, and
-// extract a suitable type for storing and forwarding arguments.
-//
-// In particular, it strips off references, and converts arrays to
-// pointers for storage; and it avoids accidentally trying to create a
-// "reference of a reference" if the argument is a reference type.
-//
-// This array type becomes an issue for storage because we are passing bound
-// parameters by const reference. In this case, we end up passing an actual
-// array type in the initializer list which C++ does not allow.  This will
-// break passing of C-string literals.
-template <typename T, bool is_move_only = IsMoveOnlyType<T>::value>
-struct CallbackParamTraits {
-  typedef const T& ForwardType;
-  typedef T StorageType;
-};
-
-// The Storage should almost be impossible to trigger unless someone manually
-// specifies type of the bind parameters.  However, in case they do,
-// this will guard against us accidentally storing a reference parameter.
-//
-// The ForwardType should only be used for unbound arguments.
-template <typename T>
-struct CallbackParamTraits<T&, false> {
-  typedef T& ForwardType;
-  typedef T StorageType;
-};
-
-// Note that for array types, we implicitly add a const in the conversion. This
-// means that it is not possible to bind array arguments to functions that take
-// a non-const pointer. Trying to specialize the template based on a "const
-// T[n]" does not seem to match correctly, so we are stuck with this
-// restriction.
-template <typename T, size_t n>
-struct CallbackParamTraits<T[n], false> {
-  typedef const T* ForwardType;
-  typedef const T* StorageType;
-};
-
-// See comment for CallbackParamTraits<T[n]>.
-template <typename T>
-struct CallbackParamTraits<T[], false> {
-  typedef const T* ForwardType;
-  typedef const T* StorageType;
-};
-
-// Parameter traits for movable-but-not-copyable scopers.
-//
-// Callback<>/Bind() understands movable-but-not-copyable semantics where
-// the type cannot be copied but can still have its state destructively
-// transferred (aka. moved) to another instance of the same type by calling a
-// helper function.  When used with Bind(), this signifies transferal of the
-// object's state to the target function.
-//
-// For these types, the ForwardType must not be a const reference, or a
-// reference.  A const reference is inappropriate, and would break const
-// correctness, because we are implementing a destructive move.  A non-const
-// reference cannot be used with temporaries which means the result of a
-// function or a cast would not be usable with Callback<> or Bind().
-template <typename T>
-struct CallbackParamTraits<T, true> {
-  typedef T ForwardType;
-  typedef T StorageType;
-};
-
-// CallbackForward() is a very limited simulation of C++11's std::forward()
-// used by the Callback/Bind system for a set of movable-but-not-copyable
-// types.  It is needed because forwarding a movable-but-not-copyable
-// argument to another function requires us to invoke the proper move
-// operator to create a rvalue version of the type.  The supported types are
-// whitelisted below as overloads of the CallbackForward() function. The
-// default template compiles out to be a no-op.
-//
-// In C++11, std::forward would replace all uses of this function.  However, it
-// is impossible to implement a general std::forward with C++11 due to a lack
-// of rvalue references.
-//
-// In addition to Callback/Bind, this is used by PostTaskAndReplyWithResult to
-// simulate std::forward() and forward the result of one Callback as a
-// parameter to another callback. This is to support Callbacks that return
-// the movable-but-not-copyable types whitelisted above.
-template <typename T>
-typename enable_if<!IsMoveOnlyType<T>::value, T>::type& CallbackForward(T& t) {
-  return t;
-}
-
-template <typename T>
-typename enable_if<IsMoveOnlyType<T>::value, T>::type CallbackForward(T& t) {
-  return t.Pass();
-}
-
-}  // namespace internal
-}  // namespace butil
-
-#endif  // BASE_CALLBACK_INTERNAL_H_

src/butil/callback_list.h

-// This file was GENERATED by command:
-//     pump.py callback_list.h.pump
-// DO NOT EDIT BY HAND!!!
-
-
-// Copyright 2013 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef BASE_CALLBACK_LIST_H_
-#define BASE_CALLBACK_LIST_H_
-
-#include <list>
-
-#include "butil/basictypes.h"
-#include "butil/callback.h"
-#include "butil/callback_internal.h"
-#include "butil/compiler_specific.h"
-#include "butil/logging.h"
-#include "butil/memory/scoped_ptr.h"
-
-// OVERVIEW:
-//
-// A container for a list of callbacks.  Unlike a normal STL vector or list,
-// this container can be modified during iteration without invalidating the
-// iterator. It safely handles the case of a callback removing itself
-// or another callback from the list while callbacks are being run.
-//
-// TYPICAL USAGE:
-//
-// class MyWidget {
-//  public:
-//   ...
-//
-//   typedef butil::Callback<void(const Foo&)> OnFooCallback;
-//
-//   scoped_ptr<butil::CallbackList<void(const Foo&)>::Subscription>
-//   RegisterCallback(const OnFooCallback& cb) {
-//     return callback_list_.Add(cb);
-//   }
-//
-//  private:
-//   void NotifyFoo(const Foo& foo) {
-//      callback_list_.Notify(foo);
-//   }
-//
-//   butil::CallbackList<void(const Foo&)> callback_list_;
-//
-//   DISALLOW_COPY_AND_ASSIGN(MyWidget);
-// };
-//
-//
-// class MyWidgetListener {
-//  public:
-//   MyWidgetListener::MyWidgetListener() {
-//     foo_subscription_ = MyWidget::GetCurrent()->RegisterCallback(
-//             butil::Bind(&MyWidgetListener::OnFoo, this)));
-//   }
-//
-//   MyWidgetListener::~MyWidgetListener() {
-//      // Subscription gets deleted automatically and will deregister
-//      // the callback in the process.
-//   }
-//
-//  private:
-//   void OnFoo(const Foo& foo) {
-//     // Do something.
-//   }
-//
-//   scoped_ptr<butil::CallbackList<void(const Foo&)>::Subscription>
-//       foo_subscription_;
-//
-//   DISALLOW_COPY_AND_ASSIGN(MyWidgetListener);
-// };
-
-namespace butil {
-
-namespace internal {
-
-template <typename CallbackType>
-class CallbackListBase {
- public:
-  class Subscription {
-   public:
-    Subscription(CallbackListBase<CallbackType>* list,
-                 typename std::list<CallbackType>::iterator iter)
-        : list_(list),
-          iter_(iter) {
-    }
-
-    ~Subscription() {
-      if (list_->active_iterator_count_) {
-        iter_->Reset();
-      } else {
-        list_->callbacks_.erase(iter_);
-        if (!list_->removal_callback_.is_null())
-          list_->removal_callback_.Run();
-      }
-    }
-
-   private:
-    CallbackListBase<CallbackType>* list_;
-    typename std::list<CallbackType>::iterator iter_;
-
-    DISALLOW_COPY_AND_ASSIGN(Subscription);
-  };
-
-  // Add a callback to the list. The callback will remain registered until the
-  // returned Subscription is destroyed, which must occur before the
-  // CallbackList is destroyed.
-  scoped_ptr<Subscription> Add(const CallbackType& cb) WARN_UNUSED_RESULT {
-    DCHECK(!cb.is_null());
-    return scoped_ptr<Subscription>(
-        new Subscription(this, callbacks_.insert(callbacks_.end(), cb)));
-  }
-
-  // Sets a callback which will be run when a subscription list is changed.
-  void set_removal_callback(const Closure& callback) {
-    removal_callback_ = callback;
-  }
-
-  // Returns true if there are no subscriptions. This is only valid to call when
-  // not looping through the list.
-  bool empty() {
-    DCHECK_EQ(0, active_iterator_count_);
-    return callbacks_.empty();
-  }
-
- protected:
-  // An iterator class that can be used to access the list of callbacks.
-  class Iterator {
-   public:
-    explicit Iterator(CallbackListBase<CallbackType>* list)
-        : list_(list),
-          list_iter_(list_->callbacks_.begin()) {
-      ++list_->active_iterator_count_;
-    }
-
-    Iterator(const Iterator& iter)
-        : list_(iter.list_),
-          list_iter_(iter.list_iter_) {
-      ++list_->active_iterator_count_;
-    }
-
-    ~Iterator() {
-      if (list_ && --list_->active_iterator_count_ == 0) {
-        list_->Compact();
-      }
-    }
-
-    CallbackType* GetNext() {
-      while ((list_iter_ != list_->callbacks_.end()) && list_iter_->is_null())
-        ++list_iter_;
-
-      CallbackType* cb = NULL;
-      if (list_iter_ != list_->callbacks_.end()) {
-        cb = &(*list_iter_);
-        ++list_iter_;
-      }
-      return cb;
-    }
-
-   private:
-    CallbackListBase<CallbackType>* list_;
-    typename std::list<CallbackType>::iterator list_iter_;
-  };
-
-  CallbackListBase() : active_iterator_count_(0) {}
-
-  ~CallbackListBase() {
-    DCHECK_EQ(0, active_iterator_count_);
-    DCHECK_EQ(0U, callbacks_.size());
-  }
-
-  // Returns an instance of a CallbackListBase::Iterator which can be used
-  // to run callbacks.
-  Iterator GetIterator() {
-    return Iterator(this);
-  }
-
-  // Compact the list: remove any entries which were NULLed out during
-  // iteration.
-  void Compact() {
-    typename std::list<CallbackType>::iterator it = callbacks_.begin();
-    bool updated = false;
-    while (it != callbacks_.end()) {
-      if ((*it).is_null()) {
-        updated = true;
-        it = callbacks_.erase(it);
-      } else {
-        ++it;
-      }
-
-      if (updated && !removal_callback_.is_null())
-        removal_callback_.Run();
-    }
-  }
-
- private:
-  std::list<CallbackType> callbacks_;
-  int active_iterator_count_;
-  Closure removal_callback_;
-
-  DISALLOW_COPY_AND_ASSIGN(CallbackListBase);
-};
-
-}  // namespace internal
-
-template <typename Sig> class CallbackList;
-
-template <>
-class CallbackList<void(void)>
-    : public internal::CallbackListBase<Callback<void(void)> > {
- public:
-  typedef Callback<void(void)> CallbackType;
-
-  CallbackList() {}
-
-  void Notify() {
-    internal::CallbackListBase<CallbackType>::Iterator it =
-        this->GetIterator();
-    CallbackType* cb;
-    while ((cb = it.GetNext()) != NULL) {
-      cb->Run();
-    }
-  }
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(CallbackList);
-};
-
-template <typename A1>
-class CallbackList<void(A1)>
-    : public internal::CallbackListBase<Callback<void(A1)> > {
- public:
-  typedef Callback<void(A1)> CallbackType;
-
-  CallbackList() {}
-
-  void Notify(typename internal::CallbackParamTraits<A1>::ForwardType a1) {
-    typename internal::CallbackListBase<CallbackType>::Iterator it =
-        this->GetIterator();
-    CallbackType* cb;
-    while ((cb = it.GetNext()) != NULL) {
-      cb->Run(a1);
-    }
-  }
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(CallbackList);
-};
-
-template <typename A1, typename A2>
-class CallbackList<void(A1, A2)>
-    : public internal::CallbackListBase<Callback<void(A1, A2)> > {
- public:
-  typedef Callback<void(A1, A2)> CallbackType;
-
-  CallbackList() {}
-
-  void Notify(typename internal::CallbackParamTraits<A1>::ForwardType a1,
-              typename internal::CallbackParamTraits<A2>::ForwardType a2) {
-    typename internal::CallbackListBase<CallbackType>::Iterator it =
-        this->GetIterator();
-    CallbackType* cb;
-    while ((cb = it.GetNext()) != NULL) {
-      cb->Run(a1, a2);
-    }
-  }
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(CallbackList);
-};
-
-template <typename A1, typename A2, typename A3>
-class CallbackList<void(A1, A2, A3)>
-    : public internal::CallbackListBase<Callback<void(A1, A2, A3)> > {
- public:
-  typedef Callback<void(A1, A2, A3)> CallbackType;
-
-  CallbackList() {}
-
-  void Notify(typename internal::CallbackParamTraits<A1>::ForwardType a1,
-              typename internal::CallbackParamTraits<A2>::ForwardType a2,
-              typename internal::CallbackParamTraits<A3>::ForwardType a3) {
-    typename internal::CallbackListBase<CallbackType>::Iterator it =
-        this->GetIterator();
-    CallbackType* cb;
-    while ((cb = it.GetNext()) != NULL) {
-      cb->Run(a1, a2, a3);
-    }
-  }
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(CallbackList);
-};
-
-template <typename A1, typename A2, typename A3, typename A4>
-class CallbackList<void(A1, A2, A3, A4)>
-    : public internal::CallbackListBase<Callback<void(A1, A2, A3, A4)> > {
- public:
-  typedef Callback<void(A1, A2, A3, A4)> CallbackType;
-
-  CallbackList() {}
-
-  void Notify(typename internal::CallbackParamTraits<A1>::ForwardType a1,
-              typename internal::CallbackParamTraits<A2>::ForwardType a2,
-              typename internal::CallbackParamTraits<A3>::ForwardType a3,
-              typename internal::CallbackParamTraits<A4>::ForwardType a4) {
-    typename internal::CallbackListBase<CallbackType>::Iterator it =
-        this->GetIterator();
-    CallbackType* cb;
-    while ((cb = it.GetNext()) != NULL) {
-      cb->Run(a1, a2, a3, a4);
-    }
-  }
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(CallbackList);
-};
-
-template <typename A1, typename A2, typename A3, typename A4, typename A5>
-class CallbackList<void(A1, A2, A3, A4, A5)>
-    : public internal::CallbackListBase<Callback<void(A1, A2, A3, A4, A5)> > {
- public:
-  typedef Callback<void(A1, A2, A3, A4, A5)> CallbackType;
-
-  CallbackList() {}
-
-  void Notify(typename internal::CallbackParamTraits<A1>::ForwardType a1,
-              typename internal::CallbackParamTraits<A2>::ForwardType a2,
-              typename internal::CallbackParamTraits<A3>::ForwardType a3,
-              typename internal::CallbackParamTraits<A4>::ForwardType a4,
-              typename internal::CallbackParamTraits<A5>::ForwardType a5) {
-    typename internal::CallbackListBase<CallbackType>::Iterator it =
-        this->GetIterator();
-    CallbackType* cb;
-    while ((cb = it.GetNext()) != NULL) {
-      cb->Run(a1, a2, a3, a4, a5);
-    }
-  }
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(CallbackList);
-};
-
-template <typename A1, typename A2, typename A3, typename A4, typename A5,
-    typename A6>
-class CallbackList<void(A1, A2, A3, A4, A5, A6)>
-    : public internal::CallbackListBase<Callback<void(A1, A2, A3, A4, A5,
-        A6)> > {
- public:
-  typedef Callback<void(A1, A2, A3, A4, A5, A6)> CallbackType;
-
-  CallbackList() {}
-
-  void Notify(typename internal::CallbackParamTraits<A1>::ForwardType a1,
-              typename internal::CallbackParamTraits<A2>::ForwardType a2,
-              typename internal::CallbackParamTraits<A3>::ForwardType a3,
-              typename internal::CallbackParamTraits<A4>::ForwardType a4,
-              typename internal::CallbackParamTraits<A5>::ForwardType a5,
-              typename internal::CallbackParamTraits<A6>::ForwardType a6) {
-    typename internal::CallbackListBase<CallbackType>::Iterator it =
-        this->GetIterator();
-    CallbackType* cb;
-    while ((cb = it.GetNext()) != NULL) {
-      cb->Run(a1, a2, a3, a4, a5, a6);
-    }
-  }
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(CallbackList);
-};
-
-template <typename A1, typename A2, typename A3, typename A4, typename A5,
-    typename A6, typename A7>
-class CallbackList<void(A1, A2, A3, A4, A5, A6, A7)>
-    : public internal::CallbackListBase<Callback<void(A1, A2, A3, A4, A5, A6,
-        A7)> > {
- public:
-  typedef Callback<void(A1, A2, A3, A4, A5, A6, A7)> CallbackType;
-
-  CallbackList() {}
-
-  void Notify(typename internal::CallbackParamTraits<A1>::ForwardType a1,
-              typename internal::CallbackParamTraits<A2>::ForwardType a2,
-              typename internal::CallbackParamTraits<A3>::ForwardType a3,
-              typename internal::CallbackParamTraits<A4>::ForwardType a4,
-              typename internal::CallbackParamTraits<A5>::ForwardType a5,
-              typename internal::CallbackParamTraits<A6>::ForwardType a6,
-              typename internal::CallbackParamTraits<A7>::ForwardType a7) {
-    typename internal::CallbackListBase<CallbackType>::Iterator it =
-        this->GetIterator();
-    CallbackType* cb;
-    while ((cb = it.GetNext()) != NULL) {
-      cb->Run(a1, a2, a3, a4, a5, a6, a7);
-    }
-  }
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(CallbackList);
-};
-
-}  // namespace butil
-
-#endif  // BASE_CALLBACK_LIST_H_

src/butil/memory/raw_scoped_refptr_mismatch_checker.h

@@ -7,7 +7,6 @@
 
 #include "butil/memory/ref_counted.h"
 #include "butil/type_traits.h"
-#include "butil/tuple.h"
 #include "butil/build_config.h"
 
 // It is dangerous to post a task with a T* argument where T is a subtype of

src/butil/tuple.h

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// A Tuple is a generic templatized container, similar in concept to std::pair.
-// There are classes Tuple0 to Tuple6, cooresponding to the number of elements
-// it contains.  The convenient MakeTuple() function takes 0 to 6 arguments,
-// and will construct and return the appropriate Tuple object.  The functions
-// DispatchToMethod and DispatchToFunction take a function pointer or instance
-// and method pointer, and unpack a tuple into arguments to the call.
-//
-// Tuple elements are copied by value, and stored in the tuple.  See the unit
-// tests for more details of how/when the values are copied.
-//
-// Example usage:
-//   // These two methods of creating a Tuple are identical.
-//   Tuple2<int, const char*> tuple_a(1, "wee");
-//   Tuple2<int, const char*> tuple_b = MakeTuple(1, "wee");
-//
-//   void SomeFunc(int a, const char* b) { }
-//   DispatchToFunction(&SomeFunc, tuple_a);  // SomeFunc(1, "wee")
-//   DispatchToFunction(
-//       &SomeFunc, MakeTuple(10, "foo"));    // SomeFunc(10, "foo")
-//
-//   struct { void SomeMeth(int a, int b, int c) { } } foo;
-//   DispatchToMethod(&foo, &Foo::SomeMeth, MakeTuple(1, 2, 3));
-//   // foo->SomeMeth(1, 2, 3);
-
-#ifndef BASE_TUPLE_H__
-#define BASE_TUPLE_H__
-
-#include "butil/bind_helpers.h"
-
-// Traits ----------------------------------------------------------------------
-//
-// A simple traits class for tuple arguments.
-//
-// ValueType: the bare, nonref version of a type (same as the type for nonrefs).
-// RefType: the ref version of a type (same as the type for refs).
-// ParamType: what type to pass to functions (refs should not be constified).
-
-template <class P>
-struct TupleTraits {
-  typedef P ValueType;
-  typedef P& RefType;
-  typedef const P& ParamType;
-};
-
-template <class P>
-struct TupleTraits<P&> {
-  typedef P ValueType;
-  typedef P& RefType;
-  typedef P& ParamType;
-};
-
-template <class P>
-struct TupleTypes { };
-
-// Tuple -----------------------------------------------------------------------
-//
-// This set of classes is useful for bundling 0 or more heterogeneous data types
-// into a single variable.  The advantage of this is that it greatly simplifies
-// function objects that need to take an arbitrary number of parameters; see
-// RunnableMethod and IPC::MessageWithTuple.
-//
-// Tuple0 is supplied to act as a 'void' type.  It can be used, for example,
-// when dispatching to a function that accepts no arguments (see the
-// Dispatchers below).
-// Tuple1<A> is rarely useful.  One such use is when A is non-const ref that you
-// want filled by the dispatchee, and the tuple is merely a container for that
-// output (a "tier").  See MakeRefTuple and its usages.
-
-struct Tuple0 {
-  typedef Tuple0 ValueTuple;
-  typedef Tuple0 RefTuple;
-  typedef Tuple0 ParamTuple;
-};
-
-template <class A>
-struct Tuple1 {
- public:
-  typedef A TypeA;
-
-  Tuple1() {}
-  explicit Tuple1(typename TupleTraits<A>::ParamType a) : a(a) {}
-
-  A a;
-};
-
-template <class A, class B>
-struct Tuple2 {
- public:
-  typedef A TypeA;
-  typedef B TypeB;
-
-  Tuple2() {}
-  Tuple2(typename TupleTraits<A>::ParamType a,
-         typename TupleTraits<B>::ParamType b)
-      : a(a), b(b) {
-  }
-
-  A a;
-  B b;
-};
-
-template <class A, class B, class C>
-struct Tuple3 {
- public:
-  typedef A TypeA;
-  typedef B TypeB;
-  typedef C TypeC;
-
-  Tuple3() {}
-  Tuple3(typename TupleTraits<A>::ParamType a,
-         typename TupleTraits<B>::ParamType b,
-         typename TupleTraits<C>::ParamType c)
-      : a(a), b(b), c(c){
-  }
-
-  A a;
-  B b;
-  C c;
-};
-
-template <class A, class B, class C, class D>
-struct Tuple4 {
- public:
-  typedef A TypeA;
-  typedef B TypeB;
-  typedef C TypeC;
-  typedef D TypeD;
-
-  Tuple4() {}
-  Tuple4(typename TupleTraits<A>::ParamType a,
-         typename TupleTraits<B>::ParamType b,
-         typename TupleTraits<C>::ParamType c,
-         typename TupleTraits<D>::ParamType d)
-      : a(a), b(b), c(c), d(d) {
-  }
-
-  A a;
-  B b;
-  C c;
-  D d;
-};
-
-template <class A, class B, class C, class D, class E>
-struct Tuple5 {
- public:
-  typedef A TypeA;
-  typedef B TypeB;
-  typedef C TypeC;
-  typedef D TypeD;
-  typedef E TypeE;
-
-  Tuple5() {}
-  Tuple5(typename TupleTraits<A>::ParamType a,
-    typename TupleTraits<B>::ParamType b,
-    typename TupleTraits<C>::ParamType c,
-    typename TupleTraits<D>::ParamType d,
-    typename TupleTraits<E>::ParamType e)
-    : a(a), b(b), c(c), d(d), e(e) {
-  }
-
-  A a;
-  B b;
-  C c;
-  D d;
-  E e;
-};
-
-template <class A, class B, class C, class D, class E, class F>
-struct Tuple6 {
- public:
-  typedef A TypeA;
-  typedef B TypeB;
-  typedef C TypeC;
-  typedef D TypeD;
-  typedef E TypeE;
-  typedef F TypeF;
-
-  Tuple6() {}
-  Tuple6(typename TupleTraits<A>::ParamType a,
-    typename TupleTraits<B>::ParamType b,
-    typename TupleTraits<C>::ParamType c,
-    typename TupleTraits<D>::ParamType d,
-    typename TupleTraits<E>::ParamType e,
-    typename TupleTraits<F>::ParamType f)
-    : a(a), b(b), c(c), d(d), e(e), f(f) {
-  }
-
-  A a;
-  B b;
-  C c;
-  D d;
-  E e;
-  F f;
-};
-
-template <class A, class B, class C, class D, class E, class F, class G>
-struct Tuple7 {
- public:
-  typedef A TypeA;
-  typedef B TypeB;
-  typedef C TypeC;
-  typedef D TypeD;
-  typedef E TypeE;
-  typedef F TypeF;
-  typedef G TypeG;
-
-  Tuple7() {}
-  Tuple7(typename TupleTraits<A>::ParamType a,
-    typename TupleTraits<B>::ParamType b,
-    typename TupleTraits<C>::ParamType c,
-    typename TupleTraits<D>::ParamType d,
-    typename TupleTraits<E>::ParamType e,
-    typename TupleTraits<F>::ParamType f,
-    typename TupleTraits<G>::ParamType g)
-    : a(a), b(b), c(c), d(d), e(e), f(f), g(g) {
-  }
-
-  A a;
-  B b;
-  C c;
-  D d;
-  E e;
-  F f;
-  G g;
-};
-
-template <class A, class B, class C, class D, class E, class F, class G,
-          class H>
-struct Tuple8 {
- public:
-  typedef A TypeA;
-  typedef B TypeB;
-  typedef C TypeC;
-  typedef D TypeD;
-  typedef E TypeE;
-  typedef F TypeF;
-  typedef G TypeG;
-  typedef H TypeH;
-
-  Tuple8() {}
-  Tuple8(typename TupleTraits<A>::ParamType a,
-    typename TupleTraits<B>::ParamType b,
-    typename TupleTraits<C>::ParamType c,
-    typename TupleTraits<D>::ParamType d,
-    typename TupleTraits<E>::ParamType e,
-    typename TupleTraits<F>::ParamType f,
-    typename TupleTraits<G>::ParamType g,
-    typename TupleTraits<H>::ParamType h)
-    : a(a), b(b), c(c), d(d), e(e), f(f), g(g), h(h) {
-  }
-
-  A a;
-  B b;
-  C c;
-  D d;
-  E e;
-  F f;
-  G g;
-  H h;
-};
-
-// Tuple types ----------------------------------------------------------------
-//
-// Allows for selection of ValueTuple/RefTuple/ParamTuple without needing the
-// definitions of class types the tuple takes as parameters.
-
-template <>
-struct TupleTypes< Tuple0 > {
-  typedef Tuple0 ValueTuple;
-  typedef Tuple0 RefTuple;
-  typedef Tuple0 ParamTuple;
-};
-
-template <class A>
-struct TupleTypes< Tuple1<A> > {
-  typedef Tuple1<typename TupleTraits<A>::ValueType> ValueTuple;
-  typedef Tuple1<typename TupleTraits<A>::RefType> RefTuple;
-  typedef Tuple1<typename TupleTraits<A>::ParamType> ParamTuple;
-};
-
-template <class A, class B>
-struct TupleTypes< Tuple2<A, B> > {
-  typedef Tuple2<typename TupleTraits<A>::ValueType,
-                 typename TupleTraits<B>::ValueType> ValueTuple;
-typedef Tuple2<typename TupleTraits<A>::RefType,
-               typename TupleTraits<B>::RefType> RefTuple;
-  typedef Tuple2<typename TupleTraits<A>::ParamType,
-                 typename TupleTraits<B>::ParamType> ParamTuple;
-};
-
-template <class A, class B, class C>
-struct TupleTypes< Tuple3<A, B, C> > {
-  typedef Tuple3<typename TupleTraits<A>::ValueType,
-                 typename TupleTraits<B>::ValueType,
-                 typename TupleTraits<C>::ValueType> ValueTuple;
-typedef Tuple3<typename TupleTraits<A>::RefType,
-               typename TupleTraits<B>::RefType,
-               typename TupleTraits<C>::RefType> RefTuple;
-  typedef Tuple3<typename TupleTraits<A>::ParamType,
-                 typename TupleTraits<B>::ParamType,
-                 typename TupleTraits<C>::ParamType> ParamTuple;
-};
-
-template <class A, class B, class C, class D>
-struct TupleTypes< Tuple4<A, B, C, D> > {
-  typedef Tuple4<typename TupleTraits<A>::ValueType,
-                 typename TupleTraits<B>::ValueType,
-                 typename TupleTraits<C>::ValueType,
-                 typename TupleTraits<D>::ValueType> ValueTuple;
-typedef Tuple4<typename TupleTraits<A>::RefType,
-               typename TupleTraits<B>::RefType,
-               typename TupleTraits<C>::RefType,
-               typename TupleTraits<D>::RefType> RefTuple;
-  typedef Tuple4<typename TupleTraits<A>::ParamType,
-                 typename TupleTraits<B>::ParamType,
-                 typename TupleTraits<C>::ParamType,
-                 typename TupleTraits<D>::ParamType> ParamTuple;
-};
-
-template <class A, class B, class C, class D, class E>
-struct TupleTypes< Tuple5<A, B, C, D, E> > {
-  typedef Tuple5<typename TupleTraits<A>::ValueType,
-                 typename TupleTraits<B>::ValueType,
-                 typename TupleTraits<C>::ValueType,
-                 typename TupleTraits<D>::ValueType,
-                 typename TupleTraits<E>::ValueType> ValueTuple;
-typedef Tuple5<typename TupleTraits<A>::RefType,
-               typename TupleTraits<B>::RefType,
-               typename TupleTraits<C>::RefType,
-               typename TupleTraits<D>::RefType,
-               typename TupleTraits<E>::RefType> RefTuple;
-  typedef Tuple5<typename TupleTraits<A>::ParamType,
-                 typename TupleTraits<B>::ParamType,
-                 typename TupleTraits<C>::ParamType,
-                 typename TupleTraits<D>::ParamType,
-                 typename TupleTraits<E>::ParamType> ParamTuple;
-};
-
-template <class A, class B, class C, class D, class E, class F>
-struct TupleTypes< Tuple6<A, B, C, D, E, F> > {
-  typedef Tuple6<typename TupleTraits<A>::ValueType,
-                 typename TupleTraits<B>::ValueType,
-                 typename TupleTraits<C>::ValueType,
-                 typename TupleTraits<D>::ValueType,
-                 typename TupleTraits<E>::ValueType,
-                 typename TupleTraits<F>::ValueType> ValueTuple;
-typedef Tuple6<typename TupleTraits<A>::RefType,
-               typename TupleTraits<B>::RefType,
-               typename TupleTraits<C>::RefType,
-               typename TupleTraits<D>::RefType,
-               typename TupleTraits<E>::RefType,
-               typename TupleTraits<F>::RefType> RefTuple;
-  typedef Tuple6<typename TupleTraits<A>::ParamType,
-                 typename TupleTraits<B>::ParamType,
-                 typename TupleTraits<C>::ParamType,
-                 typename TupleTraits<D>::ParamType,
-                 typename TupleTraits<E>::ParamType,
-                 typename TupleTraits<F>::ParamType> ParamTuple;
-};
-
-template <class A, class B, class C, class D, class E, class F, class G>
-struct TupleTypes< Tuple7<A, B, C, D, E, F, G> > {
-  typedef Tuple7<typename TupleTraits<A>::ValueType,
-                 typename TupleTraits<B>::ValueType,
-                 typename TupleTraits<C>::ValueType,
-                 typename TupleTraits<D>::ValueType,
-                 typename TupleTraits<E>::ValueType,
-                 typename TupleTraits<F>::ValueType,
-                 typename TupleTraits<G>::ValueType> ValueTuple;
-typedef Tuple7<typename TupleTraits<A>::RefType,
-               typename TupleTraits<B>::RefType,
-               typename TupleTraits<C>::RefType,
-               typename TupleTraits<D>::RefType,
-               typename TupleTraits<E>::RefType,
-               typename TupleTraits<F>::RefType,
-               typename TupleTraits<G>::RefType> RefTuple;
-  typedef Tuple7<typename TupleTraits<A>::ParamType,
-                 typename TupleTraits<B>::ParamType,
-                 typename TupleTraits<C>::ParamType,
-                 typename TupleTraits<D>::ParamType,
-                 typename TupleTraits<E>::ParamType,
-                 typename TupleTraits<F>::ParamType,
-                 typename TupleTraits<G>::ParamType> ParamTuple;
-};
-
-template <class A, class B, class C, class D, class E, class F, class G,
-          class H>
-struct TupleTypes< Tuple8<A, B, C, D, E, F, G, H> > {
-  typedef Tuple8<typename TupleTraits<A>::ValueType,
-                 typename TupleTraits<B>::ValueType,
-                 typename TupleTraits<C>::ValueType,
-                 typename TupleTraits<D>::ValueType,
-                 typename TupleTraits<E>::ValueType,
-                 typename TupleTraits<F>::ValueType,
-                 typename TupleTraits<G>::ValueType,
-                 typename TupleTraits<H>::ValueType> ValueTuple;
-typedef Tuple8<typename TupleTraits<A>::RefType,
-               typename TupleTraits<B>::RefType,
-               typename TupleTraits<C>::RefType,
-               typename TupleTraits<D>::RefType,
-               typename TupleTraits<E>::RefType,
-               typename TupleTraits<F>::RefType,
-               typename TupleTraits<G>::RefType,
-               typename TupleTraits<H>::RefType> RefTuple;
-  typedef Tuple8<typename TupleTraits<A>::ParamType,
-                 typename TupleTraits<B>::ParamType,
-                 typename TupleTraits<C>::ParamType,
-                 typename TupleTraits<D>::ParamType,
-                 typename TupleTraits<E>::ParamType,
-                 typename TupleTraits<F>::ParamType,
-                 typename TupleTraits<G>::ParamType,
-                 typename TupleTraits<H>::ParamType> ParamTuple;
-};
-
-// Tuple creators -------------------------------------------------------------
-//
-// Helper functions for constructing tuples while inferring the template
-// argument types.
-
-inline Tuple0 MakeTuple() {
-  return Tuple0();
-}
-
-template <class A>
-inline Tuple1<A> MakeTuple(const A& a) {
-  return Tuple1<A>(a);
-}
-
-template <class A, class B>
-inline Tuple2<A, B> MakeTuple(const A& a, const B& b) {
-  return Tuple2<A, B>(a, b);
-}
-
-template <class A, class B, class C>
-inline Tuple3<A, B, C> MakeTuple(const A& a, const B& b, const C& c) {
-  return Tuple3<A, B, C>(a, b, c);
-}
-
-template <class A, class B, class C, class D>
-inline Tuple4<A, B, C, D> MakeTuple(const A& a, const B& b, const C& c,
-                                    const D& d) {
-  return Tuple4<A, B, C, D>(a, b, c, d);
-}
-
-template <class A, class B, class C, class D, class E>
-inline Tuple5<A, B, C, D, E> MakeTuple(const A& a, const B& b, const C& c,
-                                       const D& d, const E& e) {
-  return Tuple5<A, B, C, D, E>(a, b, c, d, e);
-}
-
-template <class A, class B, class C, class D, class E, class F>
-inline Tuple6<A, B, C, D, E, F> MakeTuple(const A& a, const B& b, const C& c,
-                                          const D& d, const E& e, const F& f) {
-  return Tuple6<A, B, C, D, E, F>(a, b, c, d, e, f);
-}
-
-template <class A, class B, class C, class D, class E, class F, class G>
-inline Tuple7<A, B, C, D, E, F, G> MakeTuple(const A& a, const B& b, const C& c,
-                                             const D& d, const E& e, const F& f,
-                                             const G& g) {
-  return Tuple7<A, B, C, D, E, F, G>(a, b, c, d, e, f, g);
-}
-
-template <class A, class B, class C, class D, class E, class F, class G,
-          class H>
-inline Tuple8<A, B, C, D, E, F, G, H> MakeTuple(const A& a, const B& b,
-                                                const C& c, const D& d,
-                                                const E& e, const F& f,
-                                                const G& g, const H& h) {
-  return Tuple8<A, B, C, D, E, F, G, H>(a, b, c, d, e, f, g, h);
-}
-
-// The following set of helpers make what Boost refers to as "Tiers" - a tuple
-// of references.
-
-template <class A>
-inline Tuple1<A&> MakeRefTuple(A& a) {
-  return Tuple1<A&>(a);
-}
-
-template <class A, class B>
-inline Tuple2<A&, B&> MakeRefTuple(A& a, B& b) {
-  return Tuple2<A&, B&>(a, b);
-}
-
-template <class A, class B, class C>
-inline Tuple3<A&, B&, C&> MakeRefTuple(A& a, B& b, C& c) {
-  return Tuple3<A&, B&, C&>(a, b, c);
-}
-
-template <class A, class B, class C, class D>
-inline Tuple4<A&, B&, C&, D&> MakeRefTuple(A& a, B& b, C& c, D& d) {
-  return Tuple4<A&, B&, C&, D&>(a, b, c, d);
-}
-
-template <class A, class B, class C, class D, class E>
-inline Tuple5<A&, B&, C&, D&, E&> MakeRefTuple(A& a, B& b, C& c, D& d, E& e) {
-  return Tuple5<A&, B&, C&, D&, E&>(a, b, c, d, e);
-}
-
-template <class A, class B, class C, class D, class E, class F>
-inline Tuple6<A&, B&, C&, D&, E&, F&> MakeRefTuple(A& a, B& b, C& c, D& d, E& e,
-                                                   F& f) {
-  return Tuple6<A&, B&, C&, D&, E&, F&>(a, b, c, d, e, f);
-}
-
-template <class A, class B, class C, class D, class E, class F, class G>
-inline Tuple7<A&, B&, C&, D&, E&, F&, G&> MakeRefTuple(A& a, B& b, C& c, D& d,
-                                                       E& e, F& f, G& g) {
-  return Tuple7<A&, B&, C&, D&, E&, F&, G&>(a, b, c, d, e, f, g);
-}
-
-template <class A, class B, class C, class D, class E, class F, class G,
-          class H>
-inline Tuple8<A&, B&, C&, D&, E&, F&, G&, H&> MakeRefTuple(A& a, B& b, C& c,
-                                                           D& d, E& e, F& f,
-                                                           G& g, H& h) {
-  return Tuple8<A&, B&, C&, D&, E&, F&, G&, H&>(a, b, c, d, e, f, g, h);
-}
-
-// Dispatchers ----------------------------------------------------------------
-//
-// Helper functions that call the given method on an object, with the unpacked
-// tuple arguments.  Notice that they all have the same number of arguments,
-// so you need only write:
-//   DispatchToMethod(object, &Object::method, args);
-// This is very useful for templated dispatchers, since they don't need to know
-// what type |args| is.
-
-// Non-Static Dispatchers with no out params.
-
-template <class ObjT, class Method>
-inline void DispatchToMethod(ObjT* obj, Method method, const Tuple0& arg) {
-  (obj->*method)();
-}
-
-template <class ObjT, class Method, class A>
-inline void DispatchToMethod(ObjT* obj, Method method, const A& arg) {
-  (obj->*method)(butil::internal::UnwrapTraits<A>::Unwrap(arg));
-}
-
-template <class ObjT, class Method, class A>
-inline void DispatchToMethod(ObjT* obj, Method method, const Tuple1<A>& arg) {
-  (obj->*method)(butil::internal::UnwrapTraits<A>::Unwrap(arg.a));
-}
-
-template<class ObjT, class Method, class A, class B>
-inline void DispatchToMethod(ObjT* obj,
-                             Method method,
-                             const Tuple2<A, B>& arg) {
-  (obj->*method)(butil::internal::UnwrapTraits<A>::Unwrap(arg.a),
-                 butil::internal::UnwrapTraits<B>::Unwrap(arg.b));
-}
-
-template<class ObjT, class Method, class A, class B, class C>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const Tuple3<A, B, C>& arg) {
-  (obj->*method)(butil::internal::UnwrapTraits<A>::Unwrap(arg.a),
-                 butil::internal::UnwrapTraits<B>::Unwrap(arg.b),
-                 butil::internal::UnwrapTraits<C>::Unwrap(arg.c));
-}
-
-template<class ObjT, class Method, class A, class B, class C, class D>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const Tuple4<A, B, C, D>& arg) {
-  (obj->*method)(butil::internal::UnwrapTraits<A>::Unwrap(arg.a),
-                 butil::internal::UnwrapTraits<B>::Unwrap(arg.b),
-                 butil::internal::UnwrapTraits<C>::Unwrap(arg.c),
-                 butil::internal::UnwrapTraits<D>::Unwrap(arg.d));
-}
-
-template<class ObjT, class Method, class A, class B, class C, class D, class E>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const Tuple5<A, B, C, D, E>& arg) {
-  (obj->*method)(butil::internal::UnwrapTraits<A>::Unwrap(arg.a),
-                 butil::internal::UnwrapTraits<B>::Unwrap(arg.b),
-                 butil::internal::UnwrapTraits<C>::Unwrap(arg.c),
-                 butil::internal::UnwrapTraits<D>::Unwrap(arg.d),
-                 butil::internal::UnwrapTraits<E>::Unwrap(arg.e));
-}
-
-template<class ObjT, class Method, class A, class B, class C, class D, class E,
-         class F>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const Tuple6<A, B, C, D, E, F>& arg) {
-  (obj->*method)(butil::internal::UnwrapTraits<A>::Unwrap(arg.a),
-                 butil::internal::UnwrapTraits<B>::Unwrap(arg.b),
-                 butil::internal::UnwrapTraits<C>::Unwrap(arg.c),
-                 butil::internal::UnwrapTraits<D>::Unwrap(arg.d),
-                 butil::internal::UnwrapTraits<E>::Unwrap(arg.e),
-                 butil::internal::UnwrapTraits<F>::Unwrap(arg.f));
-}
-
-template<class ObjT, class Method, class A, class B, class C, class D, class E,
-         class F, class G>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const Tuple7<A, B, C, D, E, F, G>& arg) {
-  (obj->*method)(butil::internal::UnwrapTraits<A>::Unwrap(arg.a),
-                 butil::internal::UnwrapTraits<B>::Unwrap(arg.b),
-                 butil::internal::UnwrapTraits<C>::Unwrap(arg.c),
-                 butil::internal::UnwrapTraits<D>::Unwrap(arg.d),
-                 butil::internal::UnwrapTraits<E>::Unwrap(arg.e),
-                 butil::internal::UnwrapTraits<F>::Unwrap(arg.f),
-                 butil::internal::UnwrapTraits<G>::Unwrap(arg.g));
-}
-
-template<class ObjT, class Method, class A, class B, class C, class D, class E,
-         class F, class G, class H>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const Tuple8<A, B, C, D, E, F, G, H>& arg) {
-  (obj->*method)(butil::internal::UnwrapTraits<A>::Unwrap(arg.a),
-                 butil::internal::UnwrapTraits<B>::Unwrap(arg.b),
-                 butil::internal::UnwrapTraits<C>::Unwrap(arg.c),
-                 butil::internal::UnwrapTraits<D>::Unwrap(arg.d),
-                 butil::internal::UnwrapTraits<E>::Unwrap(arg.e),
-                 butil::internal::UnwrapTraits<F>::Unwrap(arg.f),
-                 butil::internal::UnwrapTraits<G>::Unwrap(arg.g),
-                 butil::internal::UnwrapTraits<H>::Unwrap(arg.h));
-}
-
-// Static Dispatchers with no out params.
-
-template <class Function>
-inline void DispatchToFunction(Function function, const Tuple0& arg) {
-  (*function)();
-}
-
-template <class Function, class A>
-inline void DispatchToFunction(Function function, const A& arg) {
-  (*function)(arg);
-}
-
-template <class Function, class A>
-inline void DispatchToFunction(Function function, const Tuple1<A>& arg) {
-  (*function)(butil::internal::UnwrapTraits<A>::Unwrap(arg.a));
-}
-
-template<class Function, class A, class B>
-inline void DispatchToFunction(Function function, const Tuple2<A, B>& arg) {
-  (*function)(butil::internal::UnwrapTraits<A>::Unwrap(arg.a),
-              butil::internal::UnwrapTraits<B>::Unwrap(arg.b));
-}
-
-template<class Function, class A, class B, class C>
-inline void DispatchToFunction(Function function, const Tuple3<A, B, C>& arg) {
-  (*function)(butil::internal::UnwrapTraits<A>::Unwrap(arg.a),
-              butil::internal::UnwrapTraits<B>::Unwrap(arg.b),
-              butil::internal::UnwrapTraits<C>::Unwrap(arg.c));
-}
-
-template<class Function, class A, class B, class C, class D>
-inline void DispatchToFunction(Function function,
-                               const Tuple4<A, B, C, D>& arg) {
-  (*function)(butil::internal::UnwrapTraits<A>::Unwrap(arg.a),
-              butil::internal::UnwrapTraits<B>::Unwrap(arg.b),
-              butil::internal::UnwrapTraits<C>::Unwrap(arg.c),
-              butil::internal::UnwrapTraits<D>::Unwrap(arg.d));
-}
-
-template<class Function, class A, class B, class C, class D, class E>
-inline void DispatchToFunction(Function function,
-                               const Tuple5<A, B, C, D, E>& arg) {
-  (*function)(butil::internal::UnwrapTraits<A>::Unwrap(arg.a),
-              butil::internal::UnwrapTraits<B>::Unwrap(arg.b),
-              butil::internal::UnwrapTraits<C>::Unwrap(arg.c),
-              butil::internal::UnwrapTraits<D>::Unwrap(arg.d),
-              butil::internal::UnwrapTraits<E>::Unwrap(arg.e));
-}
-
-template<class Function, class A, class B, class C, class D, class E, class F>
-inline void DispatchToFunction(Function function,
-                               const Tuple6<A, B, C, D, E, F>& arg) {
-  (*function)(butil::internal::UnwrapTraits<A>::Unwrap(arg.a),
-              butil::internal::UnwrapTraits<B>::Unwrap(arg.b),
-              butil::internal::UnwrapTraits<C>::Unwrap(arg.c),
-              butil::internal::UnwrapTraits<D>::Unwrap(arg.d),
-              butil::internal::UnwrapTraits<E>::Unwrap(arg.e),
-              butil::internal::UnwrapTraits<F>::Unwrap(arg.f));
-}
-
-template<class Function, class A, class B, class C, class D, class E, class F,
-         class G>
-inline void DispatchToFunction(Function function,
-                               const Tuple7<A, B, C, D, E, F, G>& arg) {
-  (*function)(butil::internal::UnwrapTraits<A>::Unwrap(arg.a),
-              butil::internal::UnwrapTraits<B>::Unwrap(arg.b),
-              butil::internal::UnwrapTraits<C>::Unwrap(arg.c),
-              butil::internal::UnwrapTraits<D>::Unwrap(arg.d),
-              butil::internal::UnwrapTraits<E>::Unwrap(arg.e),
-              butil::internal::UnwrapTraits<F>::Unwrap(arg.f),
-              butil::internal::UnwrapTraits<G>::Unwrap(arg.g));
-}
-
-template<class Function, class A, class B, class C, class D, class E, class F,
-         class G, class H>
-inline void DispatchToFunction(Function function,
-                               const Tuple8<A, B, C, D, E, F, G, H>& arg) {
-  (*function)(butil::internal::UnwrapTraits<A>::Unwrap(arg.a),
-              butil::internal::UnwrapTraits<B>::Unwrap(arg.b),
-              butil::internal::UnwrapTraits<C>::Unwrap(arg.c),
-              butil::internal::UnwrapTraits<D>::Unwrap(arg.d),
-              butil::internal::UnwrapTraits<E>::Unwrap(arg.e),
-              butil::internal::UnwrapTraits<F>::Unwrap(arg.f),
-              butil::internal::UnwrapTraits<G>::Unwrap(arg.g),
-              butil::internal::UnwrapTraits<H>::Unwrap(arg.h));
-}
-
-// Dispatchers with 0 out param (as a Tuple0).
-
-template <class ObjT, class Method>
-inline void DispatchToMethod(ObjT* obj,
-                             Method method,
-                             const Tuple0& arg, Tuple0*) {
-  (obj->*method)();
-}
-
-template <class ObjT, class Method, class A>
-inline void DispatchToMethod(ObjT* obj, Method method, const A& arg, Tuple0*) {
-  (obj->*method)(butil::internal::UnwrapTraits<A>::Unwrap(arg));
-}
-
-template <class ObjT, class Method, class A>
-inline void DispatchToMethod(ObjT* obj,
-                             Method method,
-                             const Tuple1<A>& arg, Tuple0*) {
-  (obj->*method)(butil::internal::UnwrapTraits<A>::Unwrap(arg.a));
-}
-
-template<class ObjT, class Method, class A, class B>
-inline void DispatchToMethod(ObjT* obj,
-                             Method method,
-                             const Tuple2<A, B>& arg, Tuple0*) {
-  (obj->*method)(butil::internal::UnwrapTraits<A>::Unwrap(arg.a),
-                 butil::internal::UnwrapTraits<B>::Unwrap(arg.b));
-}
-
-template<class ObjT, class Method, class A, class B, class C>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const Tuple3<A, B, C>& arg, Tuple0*) {
-  (obj->*method)(butil::internal::UnwrapTraits<A>::Unwrap(arg.a),
-                 butil::internal::UnwrapTraits<B>::Unwrap(arg.b),
-                 butil::internal::UnwrapTraits<C>::Unwrap(arg.c));
-}
-
-template<class ObjT, class Method, class A, class B, class C, class D>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const Tuple4<A, B, C, D>& arg, Tuple0*) {
-  (obj->*method)(butil::internal::UnwrapTraits<A>::Unwrap(arg.a),
-                 butil::internal::UnwrapTraits<B>::Unwrap(arg.b),
-                 butil::internal::UnwrapTraits<C>::Unwrap(arg.c),
-                 butil::internal::UnwrapTraits<D>::Unwrap(arg.d));
-}
-
-template<class ObjT, class Method, class A, class B, class C, class D, class E>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const Tuple5<A, B, C, D, E>& arg, Tuple0*) {
-  (obj->*method)(butil::internal::UnwrapTraits<A>::Unwrap(arg.a),
-                 butil::internal::UnwrapTraits<B>::Unwrap(arg.b),
-                 butil::internal::UnwrapTraits<C>::Unwrap(arg.c),
-                 butil::internal::UnwrapTraits<D>::Unwrap(arg.d),
-                 butil::internal::UnwrapTraits<E>::Unwrap(arg.e));
-}
-
-template<class ObjT, class Method, class A, class B, class C, class D, class E,
-         class F>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const Tuple6<A, B, C, D, E, F>& arg, Tuple0*) {
-  (obj->*method)(butil::internal::UnwrapTraits<A>::Unwrap(arg.a),
-                 butil::internal::UnwrapTraits<B>::Unwrap(arg.b),
-                 butil::internal::UnwrapTraits<C>::Unwrap(arg.c),
-                 butil::internal::UnwrapTraits<D>::Unwrap(arg.d),
-                 butil::internal::UnwrapTraits<E>::Unwrap(arg.e),
-                 butil::internal::UnwrapTraits<F>::Unwrap(arg.f));
-}
-
-// Dispatchers with 1 out param.
-
-template<class ObjT, class Method,
-         class OutA>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const Tuple0& in,
-                             Tuple1<OutA>* out) {
-  (obj->*method)(&out->a);
-}
-
-template<class ObjT, class Method, class InA,
-         class OutA>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const InA& in,
-                             Tuple1<OutA>* out) {
-  (obj->*method)(in, &out->a);
-}
-
-template<class ObjT, class Method, class InA,
-         class OutA>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const Tuple1<InA>& in,
-                             Tuple1<OutA>* out) {
-  (obj->*method)(butil::internal::UnwrapTraits<InA>::Unwrap(in.a), &out->a);
-}
-
-template<class ObjT, class Method, class InA, class InB,
-         class OutA>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const Tuple2<InA, InB>& in,
-                             Tuple1<OutA>* out) {
-  (obj->*method)(butil::internal::UnwrapTraits<InA>::Unwrap(in.a),
-                 butil::internal::UnwrapTraits<InB>::Unwrap(in.b),
-                 &out->a);
-}
-
-template<class ObjT, class Method, class InA, class InB, class InC,
-         class OutA>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const Tuple3<InA, InB, InC>& in,
-                             Tuple1<OutA>* out) {
-  (obj->*method)(butil::internal::UnwrapTraits<InA>::Unwrap(in.a),
-                 butil::internal::UnwrapTraits<InB>::Unwrap(in.b),
-                 butil::internal::UnwrapTraits<InC>::Unwrap(in.c),
-                 &out->a);
-}
-
-template<class ObjT, class Method, class InA, class InB, class InC, class InD,
-         class OutA>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const Tuple4<InA, InB, InC, InD>& in,
-                             Tuple1<OutA>* out) {
-  (obj->*method)(butil::internal::UnwrapTraits<InA>::Unwrap(in.a),
-                 butil::internal::UnwrapTraits<InB>::Unwrap(in.b),
-                 butil::internal::UnwrapTraits<InC>::Unwrap(in.c),
-                 butil::internal::UnwrapTraits<InD>::Unwrap(in.d),
-                 &out->a);
-}
-
-template<class ObjT, class Method, class InA, class InB, class InC, class InD,
-         class InE, class OutA>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const Tuple5<InA, InB, InC, InD, InE>& in,
-                             Tuple1<OutA>* out) {
-  (obj->*method)(butil::internal::UnwrapTraits<InA>::Unwrap(in.a),
-                 butil::internal::UnwrapTraits<InB>::Unwrap(in.b),
-                 butil::internal::UnwrapTraits<InC>::Unwrap(in.c),
-                 butil::internal::UnwrapTraits<InD>::Unwrap(in.d),
-                 butil::internal::UnwrapTraits<InE>::Unwrap(in.e),
-                 &out->a);
-}
-
-template<class ObjT, class Method,
-         class InA, class InB, class InC, class InD, class InE, class InF,
-         class OutA>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const Tuple6<InA, InB, InC, InD, InE, InF>& in,
-                             Tuple1<OutA>* out) {
-  (obj->*method)(butil::internal::UnwrapTraits<InA>::Unwrap(in.a),
-                 butil::internal::UnwrapTraits<InB>::Unwrap(in.b),
-                 butil::internal::UnwrapTraits<InC>::Unwrap(in.c),
-                 butil::internal::UnwrapTraits<InD>::Unwrap(in.d),
-                 butil::internal::UnwrapTraits<InE>::Unwrap(in.e),
-                 butil::internal::UnwrapTraits<InF>::Unwrap(in.f),
-                 &out->a);
-}
-
-// Dispatchers with 2 out params.
-
-template<class ObjT, class Method,
-         class OutA, class OutB>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const Tuple0& in,
-                             Tuple2<OutA, OutB>* out) {
-  (obj->*method)(&out->a, &out->b);
-}
-
-template<class ObjT, class Method, class InA,
-         class OutA, class OutB>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const InA& in,
-                             Tuple2<OutA, OutB>* out) {
-  (obj->*method)(in, &out->a, &out->b);
-}
-
-template<class ObjT, class Method, class InA,
-         class OutA, class OutB>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const Tuple1<InA>& in,
-                             Tuple2<OutA, OutB>* out) {
-  (obj->*method)(
-      butil::internal::UnwrapTraits<InA>::Unwrap(in.a), &out->a, &out->b);
-}
-
-template<class ObjT, class Method, class InA, class InB,
-         class OutA, class OutB>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const Tuple2<InA, InB>& in,
-                             Tuple2<OutA, OutB>* out) {
-  (obj->*method)(butil::internal::UnwrapTraits<InA>::Unwrap(in.a),
-                 butil::internal::UnwrapTraits<InB>::Unwrap(in.b),
-                 &out->a,
-                 &out->b);
-}
-
-template<class ObjT, class Method, class InA, class InB, class InC,
-         class OutA, class OutB>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const Tuple3<InA, InB, InC>& in,
-                             Tuple2<OutA, OutB>* out) {
-  (obj->*method)(butil::internal::UnwrapTraits<InA>::Unwrap(in.a),
-                 butil::internal::UnwrapTraits<InB>::Unwrap(in.b),
-                 butil::internal::UnwrapTraits<InC>::Unwrap(in.c),
-                 &out->a,
-                 &out->b);
-}
-
-template<class ObjT, class Method, class InA, class InB, class InC, class InD,
-         class OutA, class OutB>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const Tuple4<InA, InB, InC, InD>& in,
-                             Tuple2<OutA, OutB>* out) {
-  (obj->*method)(butil::internal::UnwrapTraits<InA>::Unwrap(in.a),
-                 butil::internal::UnwrapTraits<InB>::Unwrap(in.b),
-                 butil::internal::UnwrapTraits<InC>::Unwrap(in.c),
-                 butil::internal::UnwrapTraits<InD>::Unwrap(in.d),
-                 &out->a,
-                 &out->b);
-}
-
-template<class ObjT, class Method,
-         class InA, class InB, class InC, class InD, class InE,
-         class OutA, class OutB>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const Tuple5<InA, InB, InC, InD, InE>& in,
-                             Tuple2<OutA, OutB>* out) {
-  (obj->*method)(butil::internal::UnwrapTraits<InA>::Unwrap(in.a),
-                 butil::internal::UnwrapTraits<InB>::Unwrap(in.b),
-                 butil::internal::UnwrapTraits<InC>::Unwrap(in.c),
-                 butil::internal::UnwrapTraits<InD>::Unwrap(in.d),
-                 butil::internal::UnwrapTraits<InE>::Unwrap(in.e),
-                 &out->a,
-                 &out->b);
-}
-
-template<class ObjT, class Method,
-         class InA, class InB, class InC, class InD, class InE, class InF,
-         class OutA, class OutB>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const Tuple6<InA, InB, InC, InD, InE, InF>& in,
-                             Tuple2<OutA, OutB>* out) {
-  (obj->*method)(butil::internal::UnwrapTraits<InA>::Unwrap(in.a),
-                 butil::internal::UnwrapTraits<InB>::Unwrap(in.b),
-                 butil::internal::UnwrapTraits<InC>::Unwrap(in.c),
-                 butil::internal::UnwrapTraits<InD>::Unwrap(in.d),
-                 butil::internal::UnwrapTraits<InE>::Unwrap(in.e),
-                 butil::internal::UnwrapTraits<InF>::Unwrap(in.f),
-                 &out->a,
-                 &out->b);
-}
-
-// Dispatchers with 3 out params.
-
-template<class ObjT, class Method,
-         class OutA, class OutB, class OutC>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const Tuple0& in,
-                             Tuple3<OutA, OutB, OutC>* out) {
-  (obj->*method)(&out->a, &out->b, &out->c);
-}
-
-template<class ObjT, class Method, class InA,
-         class OutA, class OutB, class OutC>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const InA& in,
-                             Tuple3<OutA, OutB, OutC>* out) {
-  (obj->*method)(in, &out->a, &out->b, &out->c);
-}
-
-template<class ObjT, class Method, class InA,
-         class OutA, class OutB, class OutC>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const Tuple1<InA>& in,
-                             Tuple3<OutA, OutB, OutC>* out) {
-  (obj->*method)(butil::internal::UnwrapTraits<InA>::Unwrap(in.a),
-                 &out->a,
-                 &out->b,
-                 &out->c);
-}
-
-template<class ObjT, class Method, class InA, class InB,
-         class OutA, class OutB, class OutC>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const Tuple2<InA, InB>& in,
-                             Tuple3<OutA, OutB, OutC>* out) {
-  (obj->*method)(butil::internal::UnwrapTraits<InA>::Unwrap(in.a),
-                 butil::internal::UnwrapTraits<InB>::Unwrap(in.b),
-                 &out->a,
-                 &out->b,
-                 &out->c);
-}
-
-template<class ObjT, class Method, class InA, class InB, class InC,
-         class OutA, class OutB, class OutC>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const Tuple3<InA, InB, InC>& in,
-                             Tuple3<OutA, OutB, OutC>* out) {
-  (obj->*method)(butil::internal::UnwrapTraits<InA>::Unwrap(in.a),
-                 butil::internal::UnwrapTraits<InB>::Unwrap(in.b),
-                 butil::internal::UnwrapTraits<InC>::Unwrap(in.c),
-                 &out->a,
-                 &out->b,
-                 &out->c);
-}
-
-template<class ObjT, class Method, class InA, class InB, class InC, class InD,
-         class OutA, class OutB, class OutC>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const Tuple4<InA, InB, InC, InD>& in,
-                             Tuple3<OutA, OutB, OutC>* out) {
-  (obj->*method)(butil::internal::UnwrapTraits<InA>::Unwrap(in.a),
-                 butil::internal::UnwrapTraits<InB>::Unwrap(in.b),
-                 butil::internal::UnwrapTraits<InC>::Unwrap(in.c),
-                 butil::internal::UnwrapTraits<InD>::Unwrap(in.d),
-                 &out->a,
-                 &out->b,
-                 &out->c);
-}
-
-template<class ObjT, class Method,
-         class InA, class InB, class InC, class InD, class InE,
-         class OutA, class OutB, class OutC>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const Tuple5<InA, InB, InC, InD, InE>& in,
-                             Tuple3<OutA, OutB, OutC>* out) {
-  (obj->*method)(butil::internal::UnwrapTraits<InA>::Unwrap(in.a),
-                 butil::internal::UnwrapTraits<InB>::Unwrap(in.b),
-                 butil::internal::UnwrapTraits<InC>::Unwrap(in.c),
-                 butil::internal::UnwrapTraits<InD>::Unwrap(in.d),
-                 butil::internal::UnwrapTraits<InE>::Unwrap(in.e),
-                 &out->a,
-                 &out->b,
-                 &out->c);
-}
-
-template<class ObjT, class Method,
-         class InA, class InB, class InC, class InD, class InE, class InF,
-         class OutA, class OutB, class OutC>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const Tuple6<InA, InB, InC, InD, InE, InF>& in,
-                             Tuple3<OutA, OutB, OutC>* out) {
-  (obj->*method)(butil::internal::UnwrapTraits<InA>::Unwrap(in.a),
-                 butil::internal::UnwrapTraits<InB>::Unwrap(in.b),
-                 butil::internal::UnwrapTraits<InC>::Unwrap(in.c),
-                 butil::internal::UnwrapTraits<InD>::Unwrap(in.d),
-                 butil::internal::UnwrapTraits<InE>::Unwrap(in.e),
-                 butil::internal::UnwrapTraits<InF>::Unwrap(in.f),
-                 &out->a,
-                 &out->b,
-                 &out->c);
-}
-
-// Dispatchers with 4 out params.
-
-template<class ObjT, class Method,
-         class OutA, class OutB, class OutC, class OutD>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const Tuple0& in,
-                             Tuple4<OutA, OutB, OutC, OutD>* out) {
-  (obj->*method)(&out->a, &out->b, &out->c, &out->d);
-}
-
-template<class ObjT, class Method, class InA,
-         class OutA, class OutB, class OutC, class OutD>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const InA& in,
-                             Tuple4<OutA, OutB, OutC, OutD>* out) {
-  (obj->*method)(butil::internal::UnwrapTraits<InA>::Unwrap(in),
-                 &out->a,
-                 &out->b,
-                 &out->c,
-                 &out->d);
-}
-
-template<class ObjT, class Method, class InA,
-         class OutA, class OutB, class OutC, class OutD>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const Tuple1<InA>& in,
-                             Tuple4<OutA, OutB, OutC, OutD>* out) {
-  (obj->*method)(butil::internal::UnwrapTraits<InA>::Unwrap(in.a),
-                 &out->a,
-                 &out->b,
-                 &out->c,
-                 &out->d);
-}
-
-template<class ObjT, class Method, class InA, class InB,
-         class OutA, class OutB, class OutC, class OutD>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const Tuple2<InA, InB>& in,
-                             Tuple4<OutA, OutB, OutC, OutD>* out) {
-  (obj->*method)(butil::internal::UnwrapTraits<InA>::Unwrap(in.a),
-                 butil::internal::UnwrapTraits<InB>::Unwrap(in.b),
-                 &out->a,
-                 &out->b,
-                 &out->c,
-                 &out->d);
-}
-
-template<class ObjT, class Method, class InA, class InB, class InC,
-         class OutA, class OutB, class OutC, class OutD>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const Tuple3<InA, InB, InC>& in,
-                             Tuple4<OutA, OutB, OutC, OutD>* out) {
-  (obj->*method)(butil::internal::UnwrapTraits<InA>::Unwrap(in.a),
-                 butil::internal::UnwrapTraits<InB>::Unwrap(in.b),
-                 butil::internal::UnwrapTraits<InC>::Unwrap(in.c),
-                 &out->a,
-                 &out->b,
-                 &out->c,
-                 &out->d);
-}
-
-template<class ObjT, class Method, class InA, class InB, class InC, class InD,
-         class OutA, class OutB, class OutC, class OutD>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const Tuple4<InA, InB, InC, InD>& in,
-                             Tuple4<OutA, OutB, OutC, OutD>* out) {
-  (obj->*method)(butil::internal::UnwrapTraits<InA>::Unwrap(in.a),
-                 butil::internal::UnwrapTraits<InB>::Unwrap(in.b),
-                 butil::internal::UnwrapTraits<InC>::Unwrap(in.c),
-                 butil::internal::UnwrapTraits<InD>::Unwrap(in.d),
-                 &out->a,
-                 &out->b,
-                 &out->c,
-                 &out->d);
-}
-
-template<class ObjT, class Method,
-         class InA, class InB, class InC, class InD, class InE,
-         class OutA, class OutB, class OutC, class OutD>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const Tuple5<InA, InB, InC, InD, InE>& in,
-                             Tuple4<OutA, OutB, OutC, OutD>* out) {
-  (obj->*method)(butil::internal::UnwrapTraits<InA>::Unwrap(in.a),
-                 butil::internal::UnwrapTraits<InB>::Unwrap(in.b),
-                 butil::internal::UnwrapTraits<InC>::Unwrap(in.c),
-                 butil::internal::UnwrapTraits<InD>::Unwrap(in.d),
-                 butil::internal::UnwrapTraits<InE>::Unwrap(in.e),
-                 &out->a,
-                 &out->b,
-                 &out->c,
-                 &out->d);
-}
-
-template<class ObjT, class Method,
-         class InA, class InB, class InC, class InD, class InE, class InF,
-         class OutA, class OutB, class OutC, class OutD>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const Tuple6<InA, InB, InC, InD, InE, InF>& in,
-                             Tuple4<OutA, OutB, OutC, OutD>* out) {
-  (obj->*method)(butil::internal::UnwrapTraits<InA>::Unwrap(in.a),
-                 butil::internal::UnwrapTraits<InB>::Unwrap(in.b),
-                 butil::internal::UnwrapTraits<InC>::Unwrap(in.c),
-                 butil::internal::UnwrapTraits<InD>::Unwrap(in.d),
-                 butil::internal::UnwrapTraits<InE>::Unwrap(in.e),
-                 butil::internal::UnwrapTraits<InF>::Unwrap(in.f),
-                 &out->a,
-                 &out->b,
-                 &out->c,
-                 &out->d);
-}
-
-// Dispatchers with 5 out params.
-
-template<class ObjT, class Method,
-         class OutA, class OutB, class OutC, class OutD, class OutE>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const Tuple0& in,
-                             Tuple5<OutA, OutB, OutC, OutD, OutE>* out) {
-  (obj->*method)(&out->a, &out->b, &out->c, &out->d, &out->e);
-}
-
-template<class ObjT, class Method, class InA,
-         class OutA, class OutB, class OutC, class OutD, class OutE>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const InA& in,
-                             Tuple5<OutA, OutB, OutC, OutD, OutE>* out) {
-  (obj->*method)(butil::internal::UnwrapTraits<InA>::Unwrap(in),
-                 &out->a,
-                 &out->b,
-                 &out->c,
-                 &out->d,
-                 &out->e);
-}
-
-template<class ObjT, class Method, class InA,
-         class OutA, class OutB, class OutC, class OutD, class OutE>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const Tuple1<InA>& in,
-                             Tuple5<OutA, OutB, OutC, OutD, OutE>* out) {
-  (obj->*method)(butil::internal::UnwrapTraits<InA>::Unwrap(in.a),
-                 &out->a,
-                 &out->b,
-                 &out->c,
-                 &out->d,
-                 &out->e);
-}
-
-template<class ObjT, class Method, class InA, class InB,
-         class OutA, class OutB, class OutC, class OutD, class OutE>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const Tuple2<InA, InB>& in,
-                             Tuple5<OutA, OutB, OutC, OutD, OutE>* out) {
-  (obj->*method)(butil::internal::UnwrapTraits<InA>::Unwrap(in.a),
-                 butil::internal::UnwrapTraits<InB>::Unwrap(in.b),
-                 &out->a,
-                 &out->b,
-                 &out->c,
-                 &out->d,
-                 &out->e);
-}
-
-template<class ObjT, class Method, class InA, class InB, class InC,
-         class OutA, class OutB, class OutC, class OutD, class OutE>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const Tuple3<InA, InB, InC>& in,
-                             Tuple5<OutA, OutB, OutC, OutD, OutE>* out) {
-  (obj->*method)(butil::internal::UnwrapTraits<InA>::Unwrap(in.a),
-                 butil::internal::UnwrapTraits<InB>::Unwrap(in.b),
-                 butil::internal::UnwrapTraits<InC>::Unwrap(in.c),
-                 &out->a,
-                 &out->b,
-                 &out->c,
-                 &out->d,
-                 &out->e);
-}
-
-template<class ObjT, class Method, class InA, class InB, class InC, class InD,
-         class OutA, class OutB, class OutC, class OutD, class OutE>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const Tuple4<InA, InB, InC, InD>& in,
-                             Tuple5<OutA, OutB, OutC, OutD, OutE>* out) {
-  (obj->*method)(butil::internal::UnwrapTraits<InA>::Unwrap(in.a),
-                 butil::internal::UnwrapTraits<InB>::Unwrap(in.b),
-                 butil::internal::UnwrapTraits<InC>::Unwrap(in.c),
-                 butil::internal::UnwrapTraits<InD>::Unwrap(in.d),
-                 &out->a,
-                 &out->b,
-                 &out->c,
-                 &out->d,
-                 &out->e);
-}
-
-template<class ObjT, class Method,
-         class InA, class InB, class InC, class InD, class InE,
-         class OutA, class OutB, class OutC, class OutD, class OutE>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const Tuple5<InA, InB, InC, InD, InE>& in,
-                             Tuple5<OutA, OutB, OutC, OutD, OutE>* out) {
-  (obj->*method)(butil::internal::UnwrapTraits<InA>::Unwrap(in.a),
-                 butil::internal::UnwrapTraits<InB>::Unwrap(in.b),
-                 butil::internal::UnwrapTraits<InC>::Unwrap(in.c),
-                 butil::internal::UnwrapTraits<InD>::Unwrap(in.d),
-                 butil::internal::UnwrapTraits<InE>::Unwrap(in.e),
-                 &out->a,
-                 &out->b,
-                 &out->c,
-                 &out->d,
-                 &out->e);
-}
-
-template<class ObjT, class Method,
-         class InA, class InB, class InC, class InD, class InE, class InF,
-         class OutA, class OutB, class OutC, class OutD, class OutE>
-inline void DispatchToMethod(ObjT* obj, Method method,
-                             const Tuple6<InA, InB, InC, InD, InE, InF>& in,
-                             Tuple5<OutA, OutB, OutC, OutD, OutE>* out) {
-  (obj->*method)(butil::internal::UnwrapTraits<InA>::Unwrap(in.a),
-                 butil::internal::UnwrapTraits<InB>::Unwrap(in.b),
-                 butil::internal::UnwrapTraits<InC>::Unwrap(in.c),
-                 butil::internal::UnwrapTraits<InD>::Unwrap(in.d),
-                 butil::internal::UnwrapTraits<InE>::Unwrap(in.e),
-                 butil::internal::UnwrapTraits<InF>::Unwrap(in.f),
-                 &out->a,
-                 &out->b,
-                 &out->c,
-                 &out->d,
-                 &out->e);
-}
-
-#endif  // BASE_TUPLE_H__

test/Makefile

@@ -21,15 +21,9 @@ LIBPATHS=$(addprefix -L, $(LIBS))
 TEST_BUTIL_SOURCES = \
     at_exit_unittest.cc \
     atomicops_unittest.cc \
-    barrier_closure_unittest.cc \
     base64_unittest.cc \
     big_endian_unittest.cc \
-    bind_unittest.cc \
     bits_unittest.cc \
-    callback_helpers_unittest.cc \
-    callback_list_unittest.cc \
-    callback_unittest.cc \
-    cancelable_callback_unittest.cc \
     hash_tables_unittest.cc \
     linked_list_unittest.cc \
     mru_cache_unittest.cc \
@@ -98,7 +92,6 @@ TEST_BUTIL_SOURCES = \
     time_unittest.cc \
     version_unittest.cc \
     logging_unittest.cc \
-    tuple_unittest.cc \
     cacheline_unittest.cpp \
     class_name_unittest.cpp \
     endpoint_unittest.cpp \

test/at_exit_unittest.cc

@@ -3,7 +3,6 @@
 // found in the LICENSE file.
 
 #include "butil/at_exit.h"
-#include "butil/bind.h"
 
 #include <gtest/gtest.h>
 
@@ -78,10 +77,3 @@ TEST_F(AtExitTest, Param) {
                                         &g_test_counter_1);
   butil::AtExitManager::ProcessCallbacksNow();
 }
-
-TEST_F(AtExitTest, Task) {
-  ZeroTestCounters();
-  butil::AtExitManager::RegisterTask(butil::Bind(&ExpectParamIsCounter,
-                                               &g_test_counter_1));
-  butil::AtExitManager::ProcessCallbacksNow();
-}

test/butil_unittest_main.cpp

@@ -5,6 +5,7 @@
 #include <gflags/gflags.h>
 #include "butil/base_switches.h"
 #include "butil/at_exit.h"
+#include "butil/logging.h"
 #include "test/multiprocess_func_list.h"
 
 // Disable coredumps by default to avoid generating a lot of coredumps

test/cancellation_flag_unittest.cc

@@ -6,7 +6,6 @@
 
 #include "butil/synchronization/cancellation_flag.h"
 
-#include "butil/bind.h"
 #include "butil/logging.h"
 #include "butil/synchronization/spin_wait.h"
 #include "butil/time/time.h"

test/condition_variable_unittest.cc

@@ -8,7 +8,6 @@
 #include <algorithm>
 #include <vector>
 
-#include "butil/bind.h"
 #include "butil/logging.h"
 #include "butil/memory/scoped_ptr.h"
 #include "butil/synchronization/condition_variable.h"

test/crash_logging_unittest.cc

@@ -7,7 +7,6 @@
 #include <map>
 #include <string>
 
-#include "butil/bind.h"
 #include <gtest/gtest.h>
 
 namespace {

test/scoped_ptr_unittest.cc

@@ -5,8 +5,6 @@
 #include "butil/memory/scoped_ptr.h"
 
 #include "butil/basictypes.h"
-#include "butil/bind.h"
-#include "butil/callback.h"
 #include <gtest/gtest.h>
 
 namespace {

test/scoped_vector_unittest.cc

@@ -4,8 +4,6 @@
 
 #include "butil/memory/scoped_vector.h"
 
-#include "butil/bind.h"
-#include "butil/callback.h"
 #include "butil/memory/scoped_ptr.h"
 #include <gtest/gtest.h>
 
@@ -272,10 +270,9 @@ TEST(ScopedVectorTest, Passed) {
   ScopedVector<DeleteCounter> deleter_vector;
   deleter_vector.push_back(new DeleteCounter(&deletes));
   EXPECT_EQ(0, deletes);
-  butil::Callback<ScopedVector<DeleteCounter>(void)> callback =
-      butil::Bind(&PassThru<DeleteCounter>, butil::Passed(&deleter_vector));
+  
   EXPECT_EQ(0, deletes);
-  ScopedVector<DeleteCounter> result = callback.Run();
+  ScopedVector<DeleteCounter> result = deleter_vector.Pass();
   EXPECT_EQ(0, deletes);
   result.clear();
   EXPECT_EQ(1, deletes);

test/test_file_util_linux.cc

@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "test/test_file_util.h"
-
 #include <fcntl.h>
 #include <sys/stat.h>
 #include <sys/types.h>

test/tuple_unittest.cc

-// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "butil/tuple.h"
-
-#include "butil/compiler_specific.h"
-#include <gtest/gtest.h>
-
-namespace {
-
-void DoAdd(int a, int b, int c, int* res) {
-  *res = a + b + c;
-}
-
-struct Addy {
-  Addy() { }
-  void DoAdd(int a, int b, int c, int d, int* res) {
-    *res = a + b + c + d;
-  }
-};
-
-struct Addz {
-  Addz() { }
-  void DoAdd(int a, int b, int c, int d, int e, int* res) {
-    *res = a + b + c + d + e;
-  }
-};
-
-}  // namespace
-
-TEST(TupleTest, Basic) {
-  Tuple0 t0 ALLOW_UNUSED = MakeTuple();
-  Tuple1<int> t1(1);
-  Tuple2<int, const char*> t2 = MakeTuple(1, static_cast<const char*>("wee"));
-  Tuple3<int, int, int> t3(1, 2, 3);
-  Tuple4<int, int, int, int*> t4(1, 2, 3, &t1.a);
-  Tuple5<int, int, int, int, int*> t5(1, 2, 3, 4, &t4.a);
-  Tuple6<int, int, int, int, int, int*> t6(1, 2, 3, 4, 5, &t4.a);
-
-  EXPECT_EQ(1, t1.a);
-  EXPECT_EQ(1, t2.a);
-  EXPECT_EQ(1, t3.a);
-  EXPECT_EQ(2, t3.b);
-  EXPECT_EQ(3, t3.c);
-  EXPECT_EQ(1, t4.a);
-  EXPECT_EQ(2, t4.b);
-  EXPECT_EQ(3, t4.c);
-  EXPECT_EQ(1, t5.a);
-  EXPECT_EQ(2, t5.b);
-  EXPECT_EQ(3, t5.c);
-  EXPECT_EQ(4, t5.d);
-  EXPECT_EQ(1, t6.a);
-  EXPECT_EQ(2, t6.b);
-  EXPECT_EQ(3, t6.c);
-  EXPECT_EQ(4, t6.d);
-  EXPECT_EQ(5, t6.e);
-
-  EXPECT_EQ(1, t1.a);
-  DispatchToFunction(&DoAdd, t4);
-  EXPECT_EQ(6, t1.a);
-
-  int res = 0;
-  DispatchToFunction(&DoAdd, MakeTuple(9, 8, 7, &res));
-  EXPECT_EQ(24, res);
-
-  Addy addy;
-  EXPECT_EQ(1, t4.a);
-  DispatchToMethod(&addy, &Addy::DoAdd, t5);
-  EXPECT_EQ(10, t4.a);
-
-  Addz addz;
-  EXPECT_EQ(10, t4.a);
-  DispatchToMethod(&addz, &Addz::DoAdd, t6);
-  EXPECT_EQ(15, t4.a);
-}
-
-namespace {
-
-struct CopyLogger {
-  CopyLogger() { ++TimesConstructed; }
-  CopyLogger(const CopyLogger& tocopy) { ++TimesConstructed; ++TimesCopied; }
-  ~CopyLogger() { }
-
-  static int TimesCopied;
-  static int TimesConstructed;
-};
-
-void SomeLoggerMethRef(const CopyLogger& logy, const CopyLogger* ptr, bool* b) {
-  *b = &logy == ptr;
-}
-
-void SomeLoggerMethCopy(CopyLogger logy, const CopyLogger* ptr, bool* b) {
-  *b = &logy == ptr;
-}
-
-int CopyLogger::TimesCopied = 0;
-int CopyLogger::TimesConstructed = 0;
-
-}  // namespace
-
-TEST(TupleTest, Copying) {
-  CopyLogger logger;
-  EXPECT_EQ(0, CopyLogger::TimesCopied);
-  EXPECT_EQ(1, CopyLogger::TimesConstructed);
-
-  bool res = false;
-
-  // Creating the tuple should copy the class to store internally in the tuple.
-  Tuple3<CopyLogger, CopyLogger*, bool*> tuple(logger, &logger, &res);
-  tuple.b = &tuple.a;
-  EXPECT_EQ(2, CopyLogger::TimesConstructed);
-  EXPECT_EQ(1, CopyLogger::TimesCopied);
-
-  // Our internal Logger and the one passed to the function should be the same.
-  res = false;
-  DispatchToFunction(&SomeLoggerMethRef, tuple);
-  EXPECT_TRUE(res);
-  EXPECT_EQ(2, CopyLogger::TimesConstructed);
-  EXPECT_EQ(1, CopyLogger::TimesCopied);
-
-  // Now they should be different, since the function call will make a copy.
-  res = false;
-  DispatchToFunction(&SomeLoggerMethCopy, tuple);
-  EXPECT_FALSE(res);
-  EXPECT_EQ(3, CopyLogger::TimesConstructed);
-  EXPECT_EQ(2, CopyLogger::TimesCopied);
-}

test/weak_ptr_unittest.cc

@@ -6,7 +6,6 @@
 
 #include <string>
 
-#include "butil/bind.h"
 #include "butil/debug/leak_annotations.h"
 #include "butil/memory/scoped_ptr.h"
 #include "butil/synchronization/waitable_event.h"