thread safety

tests/test_thread_safe.cpp

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+/*:
+    Copyright (c) 2007-2015 Contributors as noted in the AUTHORS file
+
+    This file is part of 0MQ.
+
+    0MQ is free software; you can redistribute it and/or modify it under
+    the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    0MQ is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "testutil.hpp"
+
+void worker1(void* s);
+void worker2(void* s);
+
+int main (void)
+{
+    setup_test_environment();
+    void *ctx = zmq_ctx_new ();
+    assert (ctx);
+
+    void *client = zmq_socket (ctx, ZMQ_CLIENT);
+    void *client2 = zmq_socket (ctx, ZMQ_CLIENT);
+
+    int rc;
+
+    rc = zmq_bind (client, "tcp://127.0.0.1:5560");
+    assert (rc == 0);
+
+    rc = zmq_connect (client2, "tcp://127.0.0.1:5560");
+    assert (rc == 0);
+
+	void*  t1 = zmq_threadstart(worker1, client2);
+	void*  t2 = zmq_threadstart(worker2, client2);	
+
+	char data[1];
+	data[0] = 0;
+
+	for (int i=0; i < 10; i++) {
+		rc = zmq_send_const(client, data, 1, 0);
+		assert (rc == 1);
+
+		rc = zmq_send_const(client, data, 1, 0);
+		assert(rc == 1);
+
+		char a, b;
+
+		rc = zmq_recv(client, &a, 1, 0);
+		assert(rc == 1);
+
+		rc = zmq_recv(client, &b, 1, 0);
+		assert(rc == 1);
+
+		// make sure they came from different threads
+		assert((a == 1 && b == 2) || (a == 2 && b == 1));
+	}
+
+	// make the thread exit
+	data[0] = 1;
+
+	rc = zmq_send_const(client, data, 1, 0);
+	assert (rc == 1);
+
+	rc = zmq_send_const(client, data, 1, 0);
+	assert(rc == 1);
+
+	zmq_threadclose(t1);
+	zmq_threadclose(t2);	
+
+    rc = zmq_close (client2);
+    assert (rc == 0);
+
+    rc = zmq_close (client);
+    assert (rc == 0);
+
+    rc = zmq_ctx_term (ctx);
+    assert (rc == 0);
+
+    return 0 ;
+}
+
+void worker1(void* s)
+{
+	const char worker_id = 1;
+	char c;
+
+	while (true)
+	{
+		int rc = zmq_recv(s, &c,1, 0); 
+		assert(rc == 1);
+
+		if (c == 0)
+		{
+			msleep(10);			
+			rc = zmq_send_const(s,&worker_id, 1, 0);
+			assert(rc == 1);
+		}
+		else
+		{
+			// we got exit request
+			break;
+		}
+	}
+}
+
+void worker2(void* s)
+{
+	const char worker_id = 2;
+	char c;
+
+	while (true)
+	{
+		int rc = zmq_recv(s, &c,1, 0); 
+		assert(rc == 1);
+
+		assert(c == 1 || c == 0);
+
+		if (c == 0)
+		{
+			msleep(10);			
+			rc = zmq_send_const(s,&worker_id, 1, 0);
+			assert(rc == 1);
+		}
+		else
+		{
+			// we got exit request
+			break;
+		}
+	}
+}
+
+
+
+
+
+