problem:closed poller still associated with socket

src/mailbox_safe.cpp

@@ -52,12 +52,12 @@ zmq::mailbox_safe_t::~mailbox_safe_t ()
     sync->unlock ();
 }
 
-void zmq::mailbox_safe_t::add_signaler(signaler_t* signaler)
+void zmq::mailbox_safe_t::add_signaler (signaler_t* signaler)
 {
     signalers.push_back(signaler);
 }
 
-void zmq::mailbox_safe_t::remove_signaler(signaler_t* signaler)
+void zmq::mailbox_safe_t::remove_signaler (signaler_t* signaler)
 {
     std::vector<signaler_t*>::iterator it = signalers.begin();
 
@@ -71,6 +71,11 @@ void zmq::mailbox_safe_t::remove_signaler(signaler_t* signaler)
         signalers.erase(it);
 }
 
+void zmq::mailbox_safe_t::clear_signalers ()
+{
+    signalers.clear ();
+}
+
 void zmq::mailbox_safe_t::send (const command_t &cmd_)
 {
     sync->lock ();

src/mailbox_safe.hpp

@@ -57,8 +57,9 @@ namespace zmq
         int recv (command_t *cmd_, int timeout_);
 
         // Add signaler to mailbox which will be called when a message is ready
-        void add_signaler(signaler_t* signaler);
-        void remove_signaler(signaler_t* signaler);
+        void add_signaler (signaler_t* signaler);
+        void remove_signaler (signaler_t* signaler);
+        void clear_signalers ();
 
 #ifdef HAVE_FORK
         // close the file descriptors in the signaller. This is used in a forked

src/socket_base.cpp

@@ -1281,6 +1281,12 @@ int zmq::socket_base_t::recv (msg_t *msg_, int flags_)
 
 int zmq::socket_base_t::close ()
 {
+    ENTER_MUTEX ();
+    
+    //  Remove all existing signalers for thread safe sockets
+    if (thread_safe)
+        ((mailbox_safe_t*)mailbox)->clear_signalers();
+
     //  Mark the socket as dead
     tag = 0xdeadbeef;
 
@@ -1289,6 +1295,7 @@ int zmq::socket_base_t::close ()
     //  process.
     send_reap (this);
 
+    EXIT_MUTEX ();
     return 0;
 }
 

src/socket_poller.cpp

@@ -186,19 +186,14 @@ int zmq::socket_poller_t::remove (socket_base_t *socket_)
         return -1;
     }
 
+    items.erase(it);
+    need_rebuild = true;
+
     int thread_safe;
     size_t thread_safe_size = sizeof(int);
 
-    if (socket_->getsockopt (ZMQ_THREAD_SAFE, &thread_safe, &thread_safe_size) == -1)
-        return -1;
-
-    if (thread_safe) {
-        if (socket_->remove_signaler (&signaler) == -1)
-            return -1;
-    }
-
-    items.erase (it);
-    need_rebuild = true;
+    if (socket_->getsockopt (ZMQ_THREAD_SAFE, &thread_safe, &thread_safe_size) == 0 && thread_safe)
+        socket_->remove_signaler (&signaler);
 
     return 0;
 }

tests/test_poller.cpp

@@ -143,9 +143,7 @@ int main (void)
     assert (event.events == ZMQ_POLLOUT);
 #endif
 
-    //  Destory poller, sockets and ctx
-    rc = zmq_poller_destroy (&poller);
-    assert (rc == 0);
+    //  Destory sockets, poller and ctx    
     rc = zmq_close (sink);
     assert (rc == 0);
     rc = zmq_close (vent);
@@ -158,6 +156,8 @@ int main (void)
     rc = zmq_close (client);
     assert (rc == 0);
 #endif
+    rc = zmq_poller_destroy(&poller);
+    assert(rc == 0);
     rc = zmq_ctx_term (ctx);
     assert (rc == 0);