/*
* Copyright (c) 2001-2004 Jakub Jermar
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* 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.
*/
/** @addtogroup kernel_sync
* @{
*/
/** @file
*/
#ifndef KERN_MUTEX_H_
#define KERN_MUTEX_H_
#include <stdbool.h>
#include <stdint.h>
#include <synch/semaphore.h>
#include <abi/synch.h>
typedef enum {
MUTEX_PASSIVE,
MUTEX_RECURSIVE,
MUTEX_ACTIVE
} mutex_type_t;
struct thread;
typedef struct {
mutex_type_t type;
semaphore_t sem;
struct thread *owner;
unsigned nesting;
} mutex_t;
extern void mutex_initialize(mutex_t *, mutex_type_t);
extern bool mutex_locked(mutex_t *);
extern errno_t mutex_trylock(mutex_t *);
extern void mutex_lock(mutex_t *);
extern errno_t mutex_lock_timeout(mutex_t *, uint32_t);
extern void mutex_unlock(mutex_t *);
#endif
/** @}
*/