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/*
* libmowgli: A collection of useful routines for programming.
* mutex.h: Cross-platform mutexes.
*
* Copyright (c) 2011 William Pitcock <nenolod@dereferenced.org>
*
* 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.
*/
#ifndef __MOWGLI_MUTEX_H__
#define __MOWGLI_MUTEX_H__
#ifdef MOWGLI_OS_UNIX_TYPE
# include <thread.h>
# include <synch.h>
# define MOWGLI_FEATURE_HAVE_NATIVE_MUTEXES
# define MOWGLI_NATIVE_MUTEX_DECL(name) mutex_t (name)
#elif defined MOWGLI_OS_WIN
# define MOWGLI_FEATURE_HAVE_NATIVE_MUTEXES
# define MOWGLI_NATIVE_MUTEX_DECL(name) HANDLE (name)
#else
# include <pthread.h>
#endif
typedef struct mowgli_mutex_ mowgli_mutex_t;
typedef struct {
int (*mutex_create)(mowgli_mutex_t *mutex);
int (*mutex_lock)(mowgli_mutex_t *mutex);
int (*mutex_trylock)(mowgli_mutex_t *mutex);
int (*mutex_unlock)(mowgli_mutex_t *mutex);
int (*mutex_destroy)(mowgli_mutex_t *mutex);
} mowgli_mutex_ops_t;
struct mowgli_mutex_ {
#ifdef MOWGLI_FEATURE_HAVE_NATIVE_MUTEXES
MOWGLI_NATIVE_MUTEX_DECL(mutex);
#else
pthread_mutex_t mutex;
#endif
const mowgli_mutex_ops_t *ops;
};
#ifdef MOWGLI_NATIVE_MUTEX_DECL
# undef MOWGLI_NATIVE_MUTEX_DECL
#endif
mowgli_mutex_t *mowgli_mutex_create(void);
int mowgli_mutex_init(mowgli_mutex_t* mutex);
int mowgli_mutex_lock(mowgli_mutex_t *mutex);
int mowgli_mutex_trylock(mowgli_mutex_t *mutex);
int mowgli_mutex_unlock(mowgli_mutex_t *mutex);
int mowgli_mutex_uninit(mowgli_mutex_t *mutex);
void mowgli_mutex_destroy(mowgli_mutex_t *mutex);
void mowgli_mutex_set_policy(mowgli_thread_policy_t policy);
/* simple dispatch function to set the ops up for the various subsystems. */
static inline void mowgli_thread_set_policy(mowgli_thread_policy_t policy)
{
mowgli_mutex_set_policy(policy);
}
#endif
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