testcases/open_posix_testsuite/conformance/interfaces/pthread_exit/1-1.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 that pthread_exit()
 *
 * terminates the calling thread and makes the value 'value_ptr' available
 * to any successful join with the terminating thread.
 *
 * Steps:
 * 1.  Create a new thread.  Have it return a return code on pthread_exit();
 * 2.  Call pthread_join() in main(), and pass to it 'value_ptr'.
 * 3.  Check to see of the value_ptr and the value returned by pthread_exit() are the same;
 *
 */

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

#define RETURN_CODE 100	/* Set a random return code number. This shall be the return code of the
			 thread when using pthread_exit().*/

# define INTHREAD 0 	/* Control going to or is already for Thread */
# define INMAIN 1	/* Control going to or is already for Main */

int sem;	/* Manual semaphore used to indicate when the thread has been created. */

/* Thread's function. */
void *a_thread_func()
{
	sem=INMAIN;
	pthread_exit((void*)RETURN_CODE);
	return NULL;
}

int main()
{
	pthread_t new_th;
	int *value_ptr;

	/* Initializing variables. */
	value_ptr=0;
	sem=INTHREAD;

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

	/* Make sure the thread was created before we join it. */
	while (sem==INTHREAD)
		sleep(1);

	/* Wait for thread to return */
	if (pthread_join(new_th, (void*)&value_ptr) != 0)
	{
		perror("Error in pthread_join()\n");
		return PTS_UNRESOLVED;
	}

	/* Check to make sure that 'value_ptr' that was passed to pthread_join() and the
	 * pthread_exit() return code that was used in the thread funciton are the same. */
	if ((long)value_ptr != RETURN_CODE)
	{
		printf("Test FAILED: pthread_exit() could not pass the return value of the thread in 'value_ptr' to pthread_join().\n");
		return PTS_FAIL;
	}

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