mingw-w64-libraries/winpthreads/tests_pthread/mutex8.c

/* 
 * mutex8.c
 *
 *
 * Pthreads-win32 - POSIX Threads Library for Win32
 * Copyright (C) 1998 Ben Elliston and Ross Johnson
 * Copyright (C) 1999,2000,2001 Ross Johnson
 *
 * Contact Email: rpj@ise.canberra.edu.au
 *
 * 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 2.1 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; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * --------------------------------------------------------------------------
 *
 * Test the default (type not set) mutex type exercising timedlock.
 * Thread locks mutex, another thread timedlocks the mutex.
 * Timed thread should timeout.
 *
 * Depends on API functions:
 *	pthread_mutex_lock()
 *	pthread_mutex_timedlock()
 *	pthread_mutex_unlock()
 */

#include "test.h"
#include <sys/timeb.h>

static int lockCount = 0;

static pthread_mutex_t mutex;

void * locker(void * arg)
{
  struct timespec abstime = { 0, 0 };
  struct _timeb currSysTime;
  const DWORD NANOSEC_PER_MILLISEC = 1000000;

  _ftime(&currSysTime);

  abstime.tv_sec = currSysTime.time;
  abstime.tv_nsec = NANOSEC_PER_MILLISEC * currSysTime.millitm;

  abstime.tv_sec += 1;

  assert(pthread_mutex_timedlock(&mutex, &abstime) == ETIMEDOUT);

  lockCount++;

  return 0;
}

int
main()
{
  pthread_t t;

  assert(pthread_mutex_init(&mutex, NULL) == 0);

  assert(pthread_mutex_lock(&mutex) == 0);

  assert(pthread_create(&t, NULL, locker, NULL) == 0);

  Sleep(2000);

  assert(lockCount == 1);

  assert(pthread_mutex_unlock(&mutex) == 0);

  return 0;
}