mingw-w64-libraries/winpthreads/tests/pthread_mutex/mutex8e.c

/*
 * Pthreads-win32 - POSIX Threads Library for Win32
 * Copyright (C) 1998 Ben Elliston and Ross Johnson
 * Copyright (C) 1999,2000,2001 Ross Johnson
 * Copyright (C) 2026 mingw-w64 project
 *
 * Contact Email: mingw-w64-public@lists.sourceforge.net
 *
 * 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
 */

#include "test.h"

/**
 * Test Summary:
 *
 * Main thread M creates mutex L with type `PTHREAD_MUTEX_ERRORCHECK` and
 * locks it.
 *
 * Thread A attempts to lock L with one second timeout; the call to
 * `pthread_mutex_timedlock` must fail with ETIMEDOUT.
 *
 * Thread M unlocks and destroys L.
 */

static void *ThreadA(void *arg)
{
  pthread_mutex_t *mutex = arg;
  struct timespec abstime = {0, 0};

  assert(clock_gettime(CLOCK_REALTIME, &abstime) == 0);
  abstime.tv_sec += 1;
  assert(pthread_mutex_timedlock(mutex, &abstime) == ETIMEDOUT);

  return arg;
}

int main(void)
{
  pthread_mutexattr_t mutexAttr;
  pthread_mutex_t mutex;
  pthread_t thread;
  int mutexType;
  void *result;

  assert(pthread_mutexattr_init(&mutexAttr) == 0);
  assert(pthread_mutexattr_settype(&mutexAttr, PTHREAD_MUTEX_ERRORCHECK) == 0);
  assert(pthread_mutexattr_gettype(&mutexAttr, &mutexType) == 0);
  assert(mutexType == PTHREAD_MUTEX_ERRORCHECK);
  assert(pthread_mutex_init(&mutex, &mutexAttr) == 0);
  assert(pthread_mutex_lock(&mutex) == 0);
  assert(pthread_create(&thread, NULL, ThreadA, &mutex) == 0);
  assert(pthread_join(thread, &result) == 0);
  assert(result == &mutex);
  assert(pthread_mutex_unlock(&mutex) == 0);
  assert(pthread_mutex_destroy(&mutex) == 0);
  assert(pthread_mutexattr_destroy(&mutexAttr) == 0);

  return 0;
}