mingw-w64-libraries/winpthreads/tests_pthread/mutex2.c

/* 
 * mutex2.c
 *
 *
 * --------------------------------------------------------------------------
 *
 *      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
 *
 * --------------------------------------------------------------------------
 *
 * Declare a static mutex object, lock it, 
 * and then unlock it again.
 *
 * Depends on API functions: 
 *	pthread_mutex_lock()
 *	pthread_mutex_unlock()
 */

#include "test.h"
 
pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;

int
main()
{
  assert(mutex == PTHREAD_MUTEX_INITIALIZER);
  fprintf (stderr, "Try lock\n");

  assert(pthread_mutex_lock(&mutex) == 0);
  fprintf(stderr, "Mutex locked\n");

  assert(mutex != PTHREAD_MUTEX_INITIALIZER);

  assert(mutex != NULL);

  assert(pthread_mutex_unlock(&mutex) == 0);
  fprintf(stderr, "Mutex unlocked\n");

  assert(pthread_mutex_destroy(&mutex) == 0);
  fprintf(stderr, "Mutex destroyed\n");

  assert(mutex == NULL);

  return 0;
}