Move linger test to issue repo.

https://zeromq.jira.com/browse/LIBZMQ-554

Signed-off-by: Shannen Saez <shannenlaptop@gmail.com>

554/issue.c

@@ -0,0 +1,71 @@
+#include <zmq.h>
+#include <assert.h>
+
+#define URL "tcp://127.0.0.1:5560"
+
+//  Sender connects a PUSH socket and sends a message of a given size,
+//  closing the socket and terminating the context immediately.
+//  LINGER should prevent this from dropping messages.
+
+static void sender (void *vsize)
+{
+    void *context = zmq_ctx_new ();
+    void *push = zmq_socket (context, ZMQ_PUSH);
+    size_t size = ((size_t *) vsize) [0];
+
+    int rc = zmq_connect (push, URL);
+    assert (rc == 0);
+
+    zmq_msg_t msg;
+    rc = zmq_msg_init_size (&msg, size);
+    assert (rc == 0);
+
+    char *buf = (char *) zmq_msg_data (&msg);
+    assert (buf != NULL);
+    memset (buf, 'x', size);
+
+    rc = zmq_msg_send (&msg, push, 0);
+    assert ((size_t) rc == size);
+
+    rc = zmq_msg_close (&msg);
+    assert (rc == 0);
+
+    rc = zmq_close (push);
+    assert (rc == 0);
+
+    rc = zmq_ctx_term (context);
+    assert (rc == 0);
+}
+
+int main (void)
+{
+    void *context = zmq_ctx_new ();
+    void *pull = zmq_socket (context, ZMQ_PULL);
+    zmq_msg_t msg;
+
+    int rc = zmq_bind (pull, URL);
+    assert (rc == 0);
+
+    //  Symptom of test failure is message never received
+    int rcvtimeo = 100;
+    rc = zmq_setsockopt (pull, ZMQ_RCVTIMEO, &rcvtimeo, sizeof (int));
+    assert (rc == 0);
+
+    //  Single test case that currently provokes failure in libzmq
+    //  Note that socket will wait as long as receive timeout, before
+    //  returning a "resource unavailable" or an assertion failure in
+    //  poller_base.cpp:31.
+    size_t size = 4000000;
+
+    //  Start the sender thread and get message
+    void *send_thread = zmq_threadstart (&sender, (void *) &size);
+    zmq_msg_init (&msg);
+    rc = zmq_msg_recv (&msg, pull, 0);
+    assert ((size_t) rc == size);
+    zmq_msg_close (&msg);
+    zmq_threadclose (send_thread);
+
+    zmq_close (pull);
+    zmq_ctx_term (context);
+    return 0;
+}