/*
 * libmowgli: A collection of useful routines for programming.
 * posix_mutexops.c: POSIX Mutexes.
 *
 * Copyright (c) 2011 Wilcox Technologies, LLC <awilcox -at- wilcox-tech.com>
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice is present in all copies.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include "mowgli.h"
#include "thread/mutex_internal.h"

#ifndef _WIN32

/*************
* This "default" implementation uses pthreads.  Care has been taken to
* ensure it runs on POSIX 1003.4a (draft 4, aka DECthreads, aka what OSF/1,
* Tru64, Ultrix, CMU Mach, and HP-UX use) as well as POSIX 1003.1c-1995.
* As long as you don't try playing with the pthread_attr module or the
* scheduler routines (which are non-standard and broken anyway, IMO) then
* it should be relatively easy to maintian d4 compatibility without
* sacrificing any functionality.
*************/
# if !defined(MOWGLI_FEATURE_HAVE_NATIVE_MUTEXES)

static int
mowgli_posix_mutex_create(mowgli_mutex_t *mutex)
{
	return pthread_mutex_init(&mutex->mutex, NULL);
}

static int
mowgli_posix_mutex_lock(mowgli_mutex_t *mutex)
{
	return pthread_mutex_lock(&mutex->mutex);
}

static int
mowgli_posix_mutex_trylock(mowgli_mutex_t *mutex)
{
	return pthread_mutex_trylock(&mutex->mutex);
}

static int
mowgli_posix_mutex_unlock(mowgli_mutex_t *mutex)
{
	return pthread_mutex_unlock(&mutex->mutex);
}

static int
mowgli_posix_mutex_destroy(mowgli_mutex_t *mutex)
{
	return pthread_mutex_destroy(&mutex->mutex);
}

const mowgli_mutex_ops_t _mowgli_posix_mutex_ops =
{
	.mutex_create = mowgli_posix_mutex_create,
	.mutex_lock = mowgli_posix_mutex_lock,
	.mutex_trylock = mowgli_posix_mutex_trylock,
	.mutex_unlock = mowgli_posix_mutex_unlock,
	.mutex_destroy = mowgli_posix_mutex_destroy,
};

# endif

#endif
