Renamed the pnacl version of atomicops.h into C11 atomic, and flagged the mac…

Renamed the pnacl version of atomicops.h into C11 atomic, and flagged the mac version to that if atomic is enabled

src/google/protobuf/stubs/atomicops.h

@@ -196,7 +196,11 @@ Atomic64 Release_Load(volatile const Atomic64* ptr);
 
 // Apple.
 #elif defined(GOOGLE_PROTOBUF_OS_APPLE)
+#if __has_feature(cxx_atomic) || _GNUC_VER >= 407
+#include <google/protobuf/stubs/atomicops_internals_generic_c11_atomic.h>
+#else  // __has_feature(cxx_atomic) || _GNUC_VER >= 407
 #include <google/protobuf/stubs/atomicops_internals_macosx.h>
+#endif  // __has_feature(cxx_atomic) || _GNUC_VER >= 407
 
 // GCC.
 #elif defined(__GNUC__)
@@ -217,7 +221,7 @@ Atomic64 Release_Load(volatile const Atomic64* ptr);
 #elif defined(GOOGLE_PROTOBUF_ARCH_POWER)
 #include <google/protobuf/stubs/atomicops_internals_power.h>
 #elif defined(__native_client__)
-#include <google/protobuf/stubs/atomicops_internals_pnacl.h>
+#include <google/protobuf/stubs/atomicops_internals_generic_c11_atomic.h>
 #elif defined(GOOGLE_PROTOBUF_ARCH_PPC)
 #include <google/protobuf/stubs/atomicops_internals_ppc_gcc.h>
 #elif (((__GNUC__ == 4) && (__GNUC_MINOR__ >= 7)) || (__GNUC__ > 4))

src/google/protobuf/stubs/atomicops_internals_pnacl.h → src/google/protobuf/stubs/atomicops_internals_generic_c11_atomic.h

@@ -30,8 +30,8 @@
 
 // This file is an internal atomic implementation, use atomicops.h instead.
 
-#ifndef GOOGLE_PROTOBUF_ATOMICOPS_INTERNALS_PNACL_H_
-#define GOOGLE_PROTOBUF_ATOMICOPS_INTERNALS_PNACL_H_
+#ifndef GOOGLE_PROTOBUF_ATOMICOPS_INTERNALS_GENERIC_C11_ATOMIC_H_
+#define GOOGLE_PROTOBUF_ATOMICOPS_INTERNALS_GENERIC_C11_ATOMIC_H_
 
 #include <atomic>
 
@@ -228,4 +228,4 @@ inline Atomic64 Release_Load(volatile const Atomic64* ptr) {
 }  // namespace protobuf
 }  // namespace google
 
-#endif  // GOOGLE_PROTOBUF_ATOMICOPS_INTERNALS_PNACL_H_
+#endif  // GOOGLE_PROTOBUF_ATOMICOPS_INTERNALS_GENERIC_C11_ATOMIC_H_