Fix hang on term when inproc is connected but never bound.

src/ctx.cpp

@@ -108,6 +108,14 @@ int zmq::ctx_t::terminate ()
             term_mailbox.forked();
         }
 #endif
+        // Connect up any pending inproc connections, otherwise we will hang
+        pending_connections_t copy = pending_connections;
+        for (pending_connections_t::iterator p = copy.begin (); p != copy.end (); ++p) {
+            zmq::socket_base_t *s = create_socket (ZMQ_PAIR);
+            s->bind (p->first.c_str ());
+            s->close ();
+        }
+
         //  Check whether termination was already underway, but interrupted and now
         //  restarted.
         bool restarted = terminating;

tests/test_inproc_connect.cpp

@@ -36,7 +36,7 @@ static void pusher (void *ctx)
     assert (rc == 0);
 }
 
-void test_bind_before_connect()
+void test_bind_before_connect ()
 {
     void *ctx = zmq_ctx_new ();
     assert (ctx);
@@ -52,7 +52,7 @@ void test_bind_before_connect()
     assert (connectSocket);
     rc = zmq_connect (connectSocket, "inproc://a");
     assert (rc == 0);
-    
+
     // Queue up some data
     rc = zmq_send_const (connectSocket, "foobar", 6, 0);
     assert (rc == 6);
@@ -77,7 +77,7 @@ void test_bind_before_connect()
     assert (rc == 0);
 }
 
-void test_connect_before_bind()
+void test_connect_before_bind ()
 {
     void *ctx = zmq_ctx_new ();
     assert (ctx);
@@ -97,7 +97,7 @@ void test_connect_before_bind()
     assert (bindSocket);
     rc = zmq_bind (bindSocket, "inproc://a");
     assert (rc == 0);
-    
+
     // Read pending message
     zmq_msg_t msg;
     rc = zmq_msg_init (&msg);
@@ -118,7 +118,7 @@ void test_connect_before_bind()
     assert (rc == 0);
 }
 
-void test_connect_before_bind_pub_sub()
+void test_connect_before_bind_pub_sub ()
 {
     void *ctx = zmq_ctx_new ();
     assert (ctx);
@@ -140,7 +140,7 @@ void test_connect_before_bind_pub_sub()
     assert (rc == 0);
     rc = zmq_bind (bindSocket, "inproc://a");
     assert (rc == 0);
-   
+
     // Wait for pub-sub connection to happen
     msleep (SETTLE_TIME);
 
@@ -168,14 +168,14 @@ void test_connect_before_bind_pub_sub()
     assert (rc == 0);
 }
 
-void test_multiple_connects()
+void test_multiple_connects ()
 {
     const unsigned int no_of_connects = 10;
     void *ctx = zmq_ctx_new ();
     assert (ctx);
 
     int rc;
-    void *connectSocket[no_of_connects];
+    void *connectSocket [no_of_connects];
 
     // Connect first
     for (unsigned int i = 0; i < no_of_connects; ++i)
@@ -195,7 +195,7 @@ void test_multiple_connects()
     assert (bindSocket);
     rc = zmq_bind (bindSocket, "inproc://a");
     assert (rc == 0);
-    
+
     for (unsigned int i = 0; i < no_of_connects; ++i)
     {
         // Read pending message
@@ -222,7 +222,7 @@ void test_multiple_connects()
     assert (rc == 0);
 }
 
-void test_multiple_threads()
+void test_multiple_threads ()
 {
     const unsigned int no_of_threads = 30;
     void *ctx = zmq_ctx_new ();
@@ -268,21 +268,21 @@ void test_multiple_threads()
     assert (rc == 0);
 }
 
-void test_identity()
+void test_identity ()
 {
     //  Create the infrastructure
     void *ctx = zmq_ctx_new ();
     assert (ctx);
-    
+
     void *sc = zmq_socket (ctx, ZMQ_DEALER);
     assert (sc);
-    
+
     int rc = zmq_connect (sc, "inproc://a");
     assert (rc == 0);
-   
+
     void *sb = zmq_socket (ctx, ZMQ_ROUTER);
     assert (sb);
-    
+
     rc = zmq_bind (sb, "inproc://a");
     assert (rc == 0);
 
@@ -316,17 +316,34 @@ void test_identity()
     //  Deallocate the infrastructure.
     rc = zmq_close (sc);
     assert (rc == 0);
-    
+
     rc = zmq_close (sb);
     assert (rc == 0);
-    
+
+    rc = zmq_ctx_term (ctx);
+    assert (rc == 0);
+}
+
+void test_connect_only ()
+{
+    void *ctx = zmq_ctx_new ();
+    assert (ctx);
+
+    void *connectSocket = zmq_socket (ctx, ZMQ_PUSH);
+    assert (connectSocket);
+    int rc = zmq_connect (connectSocket, "inproc://a");
+    assert (rc == 0);
+
+    rc = zmq_close (connectSocket);
+    assert (rc == 0);
+
     rc = zmq_ctx_term (ctx);
     assert (rc == 0);
 }
 
 int main (void)
 {
-    setup_test_environment();
+    setup_test_environment ();
 
     test_bind_before_connect ();
     test_connect_before_bind ();
@@ -334,6 +351,7 @@ int main (void)
     test_multiple_connects ();
     test_multiple_threads ();
     test_identity ();
+    test_connect_only ();
 
     return 0;
 }