text: /* 
   * mutex3e.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, trylock it, 
   * and then unlock it again.
   *
   * Depends on API functions: 
   *	pthread_mutex_lock()
   *	pthread_mutex_trylock()
   *	pthread_mutex_unlock()
   */
  
  #include "test.h"
   
  pthread_mutex_t mutex1 = PTHREAD_ERRORCHECK_MUTEX_INITIALIZER;
  
  static int washere = 0;
  
  void * func(void * arg)
  {
    assert(pthread_mutex_trylock(&mutex1) == EBUSY);
  
    washere = 1;
  
    return 0; 
  }
   
  int
  main()
  {
    pthread_t t;
  
    assert(pthread_mutex_lock(&mutex1) == 0);
  
    assert(pthread_create(&t, NULL, func, NULL) == 0);
    assert(pthread_join(t, NULL) == 0);
  
    assert(pthread_mutex_unlock(&mutex1) == 0);
  
    assert(washere == 1);
  
    return 0;
  }
  