/* Helper program for testing the pthread_rwlock_t pretty printer.

   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/>.  */

/* Keep the calls to the pthread_* functions on separate lines to make it easy

   to advance through the program using the gdb 'next' command.  */

#include <pthread.h>

#define PASS 0

#define FAIL 1

static int test_locking_reader (pthread_rwlock_t *rwlock);

static int test_locking_writer (pthread_rwlock_t *rwlock);

int

main (void)

{

  pthread_rwlock_t rwlock;

  int result = FAIL;

  if (test_locking_reader (&rwlock) == PASS

      && test_locking_writer (&rwlock) == PASS)

    result = PASS;

  /* Else, one of the pthread_rwlock* functions failed.  */

  return result;

}

/* Tests locking the rwlock multiple times as a reader.  */

static int

test_locking_reader (pthread_rwlock_t *rwlock)

{

  int result = FAIL;

  if (pthread_rwlock_init (rwlock, NULL) == 0

      && pthread_rwlock_rdlock (rwlock) == 0 /* Test locking (reader).  */

      && pthread_rwlock_rdlock (rwlock) == 0

      && pthread_rwlock_rdlock (rwlock) == 0

      && pthread_rwlock_unlock (rwlock) == 0

      && pthread_rwlock_unlock (rwlock) == 0

      && pthread_rwlock_unlock (rwlock) == 0

      && pthread_rwlock_destroy (rwlock) == 0)

    result = PASS;

  return result;

}

/* Tests locking the rwlock as a writer.  */

static int

test_locking_writer (pthread_rwlock_t *rwlock)

{

  int result = FAIL;

  if (pthread_rwlock_init (rwlock, NULL) == 0

      && pthread_rwlock_wrlock (rwlock) == 0 /* Test locking (writer).  */

      && pthread_rwlock_unlock (rwlock) == 0

      && pthread_rwlock_destroy (rwlock) == 0)

    result = PASS;

  return result;

}