mingw-w64-libraries/winpthreads/tests/pthread_join/join3.c

/*
 * Test for pthread_join() returning return value from threads.
 *
 *
 * --------------------------------------------------------------------------
 *
 *      Pthreads-win32 - POSIX Threads Library for Win32
 *      Copyright(C) 1998 John E. Bossom
 *      Copyright(C) 1999,2005 Pthreads-win32 contributors
 * 
 *      Contact Email: rpj@callisto.canberra.edu.au
 * 
 *      The current list of contributors is contained
 *      in the file CONTRIBUTORS included with the source
 *      code distribution. The list can also be seen at the
 *      following World Wide Web location:
 *      http://sources.redhat.com/pthreads-win32/contributors.html
 * 
 *      This library is free software; you can redistribute it and/or
 *      modify it under the terms of the GNU Lesser General Public
 *      License as published by the Free Software Foundation; either
 *      version 2 of the License, or (at your option) any later version.
 * 
 *      This library is distributed in the hope that it will be useful,
 *      but WITHOUT ANY WARRANTY; without even the implied warranty of
 *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *      Lesser General Public License for more details.
 * 
 *      You should have received a copy of the GNU Lesser General Public
 *      License along with this library in the file COPYING.LIB;
 *      if not, write to the Free Software Foundation, Inc.,
 *      59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
 *
 * --------------------------------------------------------------------------
 *
 * Depends on API functions: pthread_create().
 */

#include "test.h"

void *
func(void * arg)
{
	sched_yield();
	return arg;
}

int
main(int argc, char * argv[])
{
	pthread_t id[4];
	int i;
	intptr_t result = 0;

	/* Create a few threads and then exit. */
	for (i = 0; i < 4; i++)
	  {
	    assert(pthread_create(&id[i], NULL, func, ((void *) (size_t) i)) == 0);
	  }

	/*
	 * Let threads exit before we join them.
	 * We should still retrieve the exit code for the threads.
	 */
	Sleep(1000);

	for (i = 0; i < 4; i++)
	  {
	    assert(pthread_join(id[i], (void **) &result) == 0);
	    assert((int) result == i);
	  }

	/* Success. */
	return 0;
}