testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_trylock/3-1.c

/*
 * Copyright (c) 2002, Intel Corporation. All rights reserved.
 * Created by:  bing.wei.liu REMOVE-THIS AT intel DOT com
 * This file is licensed under the GPL license.  For the full content
 * of this license, see the COPYING file at the top level of this
 * source tree.

 * Test that pthread_mutex_trylock()
 *   Upon succesful completion, it shall return a 0
 *
 */

#include <pthread.h>
#include <stdio.h>
#include <errno.h>
#include "posixtest.h"

int main()
{
	pthread_mutex_t  mutex;
	int rc;

	/* Initialize a mutex object with the default mutex attributes */
	if ((rc=pthread_mutex_init(&mutex,NULL)) != 0) {
		fprintf(stderr,"Error at pthread_mutex_init(), rc=%d\n",rc);
		return PTS_UNRESOLVED;
	}

	/* Try to lock the mutex using pthread_mutex_trylock() */
	if ((rc=pthread_mutex_trylock(&mutex)) == 0) {
		pthread_mutex_unlock(&mutex);
		printf("Test PASSED\n");
		return PTS_PASS;
	}

	/* Check if returned values are tolerable */
	/* PATCH: since we are using the mutex properly,*/
	/*  errors are NOT tolerable here */
	else if (rc == EBUSY) {
		fprintf(stderr,"The mutex was already locked\n");
	}
	else if (rc == EINVAL) {
		fprintf(stderr,"Invalid mutex object\n");
	}
	else if (rc == EAGAIN) {
		fprintf(stderr,"The maximum number of recursive locks has been exceeded\n");
	}

	/* Any other returned value means the test failed */
	printf("Test FAILED\n");
	return PTS_FAIL;
}