/*-*- Mode: C; c-basic-offset: 8 -*-*/

/***

  This file is part of libcanberra.

  Copyright 2008 Lennart Poettering

  libcanberra 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.

  libcanberra 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 libcanberra. If not, see

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

***/

#ifdef HAVE_CONFIG_H

#include <config.h>

#endif

#include <pthread.h>

#include <errno.h>

#include "mutex.h"

#include "malloc.h"

struct ca_mutex {

        pthread_mutex_t mutex;

};

ca_mutex* ca_mutex_new(void) {

        ca_mutex *m;

        if (!(m = ca_new(ca_mutex, 1)))

                return NULL;

        if (pthread_mutex_init(&m->mutex, NULL) < 0) {

                ca_free(m);

                return NULL;

        }

        return m;

}

void ca_mutex_free(ca_mutex *m) {

        ca_assert(m);

        ca_assert_se(pthread_mutex_destroy(&m->mutex) == 0);

        ca_free(m);

}

void ca_mutex_lock(ca_mutex *m) {

        ca_assert(m);

        ca_assert_se(pthread_mutex_lock(&m->mutex) == 0);

}

ca_bool_t ca_mutex_try_lock(ca_mutex *m) {

        int r;

        ca_assert(m);

        if ((r = pthread_mutex_trylock(&m->mutex)) != 0) {

                ca_assert(r == EBUSY);

                return FALSE;

        }

        return TRUE;

}

void ca_mutex_unlock(ca_mutex *m) {

        ca_assert(m);

        ca_assert_se(pthread_mutex_unlock(&m->mutex) == 0);

}