/* Check that error checking mutexes are not subject to lock elision.

   Copyright (C) 2016-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C 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.

   The GNU C 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 the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#include <stdio.h>

#include <errno.h>

#include <time.h>

#include <pthread.h>

static int

do_test (void)

{

  struct timespec tms = { 0 };

  pthread_mutex_t mutex;

  pthread_mutexattr_t mutexattr;

  int ret = 0;

  if (pthread_mutexattr_init (&mutexattr) != 0)

    return 1;

  if (pthread_mutexattr_settype (&mutexattr, PTHREAD_MUTEX_ERRORCHECK) != 0)

    return 1;

  if (pthread_mutex_init (&mutex, &mutexattr) != 0)

    return 1;

  if (pthread_mutexattr_destroy (&mutexattr) != 0)

    return 1;

  /* The call to pthread_mutex_timedlock erroneously enabled lock elision

     on the mutex, which then triggered an assertion failure in

     pthread_mutex_unlock.  It would also defeat the error checking nature

     of the mutex.  */

  if (pthread_mutex_timedlock (&mutex, &tms) != 0)

    return 1;

  if (pthread_mutex_timedlock (&mutex, &tms) != EDEADLK)

    {

      printf ("Failed error checking on locked mutex\n");

      ret = 1;

    }

  if (pthread_mutex_unlock (&mutex) != 0)

    ret = 1;

  return ret;

}

#define TEST_FUNCTION do_test ()

#include "../test-skeleton.c"