/* 
 * mutex6s.c
 *
 *
 * --------------------------------------------------------------------------
 *
 *      Pthreads4w - POSIX Threads for Windows
 *      Copyright 1998 John E. Bossom
 *      Copyright 1999-2018, Pthreads4w contributors
 *
 *      Homepage: https://sourceforge.net/projects/pthreads4w/
 *
 *      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:
 *
 *      https://sourceforge.net/p/pthreads4w/wiki/Contributors/
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * --------------------------------------------------------------------------
 *
 * Test the default (type not set) static mutex type.
 * Should be the same as PTHREAD_MUTEX_NORMAL.
 * Thread locks mutex twice (recursive lock).
 * Locking thread should deadlock on second attempt.
 *
 * Depends on API functions: 
 *	pthread_mutex_lock()
 *	pthread_mutex_trylock()
 *	pthread_mutex_unlock()
 */

#include "test.h"

static int lockCount = 0;

static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;

void * locker(void * arg)
{
  assert(pthread_mutex_lock(&mutex) == 0);
  lockCount++;

  /* Should wait here (deadlocked) */
  assert(pthread_mutex_lock(&mutex) == 0);
  lockCount++;
  assert(pthread_mutex_unlock(&mutex) == 0);

  return 0;
}
 
int
main()
{
  pthread_t t;

  assert(mutex == PTHREAD_MUTEX_INITIALIZER);

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

  while (lockCount < 1)
    {
      Sleep(1);
    }

  assert(lockCount == 1);

  /*
   * Should succeed even though we don't own the lock
   * because FAST mutexes don't check ownership.
   */
  assert(pthread_mutex_unlock(&mutex) == 0);

  while (lockCount < 2)
    {
      Sleep(1);
    }

  assert(lockCount == 2);

  return 0;
}
