testcases/open_posix_testsuite/conformance/interfaces/pthread_create/4-1.c

/*
 * Copyright (c) 2002, Intel Corporation. All rights reserved.
 * Created by:  rolla.n.selbak 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 upon successful completion, pthread_create() shall store the ID of the
 *  the created thread in the location referenced by 'thread'.
 *
 * Steps:
 * 1.  Create a thread using pthread_create()
 * 2.  Save the thread ID resulting from pthread_create()
 * 3.  Get the thread ID from the new thread by calling
 *     pthread_self().
 * 4.  These 2 values should be equal. (i.e. the one from pthread_create()
 *     and the one from pthread_self()).
 */

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

void *a_thread_func();

pthread_t self_th; 	/* Save the value of the function call pthread_self()
			   within the thread.  Keeping it global so 'main' can
			   see it too. */

int main()
{
	pthread_t new_th;

	/* Create a new thread */
	if (pthread_create(&new_th, NULL, a_thread_func, NULL) != 0)
	{
		perror("Error creating thread\n");
		return PTS_UNRESOLVED;
	}

	/* Wait for the thread function to return to make sure we got
	 * the thread ID value from pthread_self(). */
	if (pthread_join(new_th, NULL) != 0)
	{
		perror("Error calling pthread_join()\n");
		return PTS_UNRESOLVED;
	}

	/* If the value of pthread_self() and the return value from
	 * pthread_create() is equal, then the test passes. */
	if (pthread_equal(new_th, self_th) == 0)
	{
		printf("Test FAILED\n");
		return PTS_FAIL;
	}

	printf("Test PASSED\n");
	return PTS_PASS;
}

/* The thread function that calls pthread_self() to obtain its thread ID */
void *a_thread_func()
{
	self_th=pthread_self();
	pthread_exit(0);
	return NULL;
}