Added testcase for LIBZMQ-84

84/issue.c

@@ -0,0 +1,37 @@
+#include <zmq.h>
+#include <assert.h>
+
+// Use the following command to check for sockets left in TIME_WAIT
+// due to creation of emulated socketpair in Windows.
+//      netstat -an | grep 5905
+
+// With the patch, this test program should run to completion and yield
+// no additional TIME_WAIT entries
+
+// Without the patch, "Address already in use (signaler.cpp)" assertion
+// will occur and netstat will be filled with TIME_WAIT entries.
+// Windows XP is more susceptible to this exception as it has less
+// ephemeral ports than newer versions of Windows.
+
+// On Windows XP, the program below will assert before loop iteration 1000
+
+int main (void)
+{
+    int cnt = 0;
+    for (cnt=0; cnt < 10000; cnt++) {
+        // 3 signaling mailboxes are created per context
+        void *ctx = zmq_ctx_new();
+        assert (ctx);
+        // 1 signaling mailbox is created per zmq socket
+        void *sock = zmq_socket (ctx, ZMQ_DEALER);
+        assert (sock);
+        int rc = zmq_close (sock);
+        assert (rc == 0);        
+        rc = zmq_ctx_destroy(ctx);
+        assert (rc == 0);        
+
+        if (cnt && cnt % 100==0)
+            printf("%d\n", cnt);
+    }
+    return 0;
+}