success-43.c

/*
 *  Copyright (c) 2009-2013 Alper Akcan <alper.akcan@gmail.com>
 *
 * This program is free software. It comes without any warranty, to
 * the extent permitted by applicable law. You can redistribute it
 * and/or modify it under the terms of the Do What The Fuck You Want
 * To Public License, Version 2, as published by Sam Hocevar. See
 * http://www.wtfpl.net/ for more details.
 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/time.h>
#include <pthread.h>
#include <errno.h>

static void * worker (void *arg)
{
	int rc;
	pthread_mutex_t *m;
	m = arg;
	rc = pthread_mutex_lock(&m[0]);
	if (rc != 0) {
		fprintf(stderr, "pthread_mutex_lock failed\n");
		exit(-1);
	}
	rc = pthread_mutex_lock(&m[1]);
	if (rc != 0) {
		fprintf(stderr, "pthread_mutex_lock failed\n");
		exit(-1);
	}
	rc = pthread_mutex_unlock(&m[0]);
	if (rc != 0) {
		fprintf(stderr, "pthread_mutex_lock failed\n");
		exit(-1);
	}
	rc = pthread_mutex_unlock(&m[1]);
	if (rc != 0) {
		fprintf(stderr, "pthread_mutex_lock failed\n");
		exit(-1);
	}
	return NULL;
}

int main (int argc, char *argv[])
{
	int rc;
	pthread_t t;
	pthread_mutex_t m[2];
	(void) argc;
	(void) argv;
	rc = pthread_mutex_init(&m[0], NULL);
	if (rc != 0) {
		fprintf(stderr, "pthread_mutex_init failed\n");
		exit(-1);
	}
	rc = pthread_mutex_init(&m[1], NULL);
	if (rc != 0) {
		fprintf(stderr, "pthread_mutex_init failed\n");
		exit(-1);
	}
	rc = pthread_mutex_lock(&m[0]);
	if (rc != 0) {
		fprintf(stderr, "pthread_mutex_lock failed\n");
		exit(-1);
	}
	rc = pthread_mutex_lock(&m[1]);
	if (rc != 0) {
		fprintf(stderr, "pthread_mutex_lock failed\n");
		exit(-1);
	}
	rc = pthread_create(&t, NULL, worker, &m[0]);
	if (rc != 0) {
		fprintf(stderr, "pthread_create failed\n");
		exit(-1);
	}
	rc = pthread_mutex_unlock(&m[0]);
	if (rc != 0) {
		fprintf(stderr, "pthread_mutex_lock failed\n");
		exit(-1);
	}
	rc = pthread_mutex_unlock(&m[1]);
	if (rc != 0) {
		fprintf(stderr, "pthread_mutex_lock failed\n");
		exit(-1);
	}
	rc = pthread_join(t, NULL);
	if (rc != 0) {
		fprintf(stderr, "pthread_join failed\n");
		exit(-1);
	}
	rc = pthread_mutex_destroy(&m[0]);
	if (rc != 0) {
		fprintf(stderr, "pthread_mutex_destroy failed\n");
		exit(-1);
	}
	rc = pthread_mutex_destroy(&m[1]);
	if (rc != 0) {
		fprintf(stderr, "pthread_mutex_destroy failed\n");
		exit(-1);
	}
	return 0;
}