mirror of
https://github.com/zeromq/libzmq.git
synced 2024-12-13 10:52:56 +01:00
117 lines
3.3 KiB
C++
117 lines
3.3 KiB
C++
/*
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Copyright (c) 2007-2013 Contributors as noted in the AUTHORS file
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This file is part of 0MQ.
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0MQ is free software; you can redistribute it and/or modify it under
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the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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0MQ is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "../include/zmq.h"
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#include "../include/zmq_utils.h"
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#include <stdio.h>
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#include <string.h>
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#include "testutil.hpp"
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#include <unistd.h>
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#include <signal.h>
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const char* address = "tcp://127.0.0.1:6571";
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#define NUM_MESSAGES 5
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int main (void)
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{
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int rc;
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setup_test_environment();
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printf("parent: process id = %d\n", (int)getpid());
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void *ctx = zmq_ctx_new ();
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assert (ctx);
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void* sock = zmq_socket(ctx, ZMQ_PULL);
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assert(sock);
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rc = zmq_bind(sock, address);
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assert(rc == 0);
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// wait for io threads to be running
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usleep(100000);
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printf("about to fork()\n");
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int pid = fork();
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if (pid == 0) {
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// this is the child process
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usleep(100000);
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printf("child: process id = %d\n", (int)getpid());
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printf("child: terminating inherited context...\n");
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// close the socket, or the context gets stuck indefinitely
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// zmq_close(sock);
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zmq_term(ctx);
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// create new context, socket, connect and send some messages
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void *ctx2 = zmq_ctx_new ();
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assert (ctx2);
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void* push = zmq_socket(ctx2, ZMQ_PUSH);
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assert(push);
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rc = zmq_connect(push, address);
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assert(rc == 0);
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const char* message = "hello";
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int i;
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for (i = 0; i < NUM_MESSAGES; i += 1) {
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printf("child: send message #%d\n", i);
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zmq_send(push, message, strlen(message), 0);
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usleep(100000);
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}
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printf("child: closing push socket\n");
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zmq_close(push);
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printf("child: destroying child context\n");
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zmq_ctx_destroy(ctx2);
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printf("child: done\n");
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exit(0);
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} else {
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// this is the parent process
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printf("parent: waiting for %d messages\n", NUM_MESSAGES);
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char buffer[1024];
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int i;
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for (i = 0; i < NUM_MESSAGES; i += 1) {
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int num_bytes = zmq_recv(sock, buffer, 1024, 0);
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assert(num_bytes > 0);
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buffer[num_bytes] = 0;
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printf("parent: received #%d: %s\n", i, buffer);
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}
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int child_status;
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while (true) {
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rc = waitpid(pid, &child_status, 0);
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if (rc == -1 && errno == EINTR) continue;
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printf("parent: child exit code = %d, rc = %d, errno = %d\n", WEXITSTATUS(child_status), rc, errno);
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assert(rc > 0);
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// verify the status code of the child was zero.
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assert(WEXITSTATUS(child_status) == 0);
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break;
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}
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printf("parent: done.\n");
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exit(0);
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}
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return 0;
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}
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