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/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @brief RTEMS File System Mutex
*
* @ingroup rtems_rfs
*
* RTEMS File System Mutex.
*
* It may be suprising we abstract this for the RTEMS file system but this code
* is designed to be run on host operating systems.
*/
/*
* COPYRIGHT (c) 2010 Chris Johns <chrisj@rtems.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT OWNER OR CONTRIBUTORS 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.
*/
#if !defined (_RTEMS_RFS_MUTEX_H_)
#define _RTEMS_RFS_MUTEX_H_
#include <errno.h>
#include <rtems/rfs/rtems-rfs-trace.h>
#if __rtems__
#include <rtems.h>
#include <rtems/error.h>
#include <rtems/thread.h>
#endif
/**
* RFS Mutex type.
*/
#if __rtems__
typedef rtems_recursive_mutex rtems_rfs_mutex;
#else
typedef uint32_t rtems_rfs_mutex; /* place holder */
#endif
/**
* @brief Create the mutex.
*
* @param [in] mutex is pointer to the mutex handle returned to the caller.
*
* @retval 0 Successful operation.
* @retval EIO An error occurred.
*
*/
int rtems_rfs_mutex_create (rtems_rfs_mutex* mutex);
/**
* @brief Destroy the mutex.
*
* @param[in] mutex Reference to the mutex handle returned to the caller.
*
* @retval 0 Successful operation.
* @retval EIO An error occurred.
*/
int rtems_rfs_mutex_destroy (rtems_rfs_mutex* mutex);
/**
* @brief Lock the mutex.
*
* @param[in] mutex is a pointer to the mutex to lock.
*
* @retval 0 Successful operation.
* @retval EIO An error occurred.
*/
static inline int
rtems_rfs_mutex_lock (rtems_rfs_mutex* mutex)
{
#if __rtems__
rtems_recursive_mutex_lock(mutex);
#endif
return 0;
}
/**
* @brief Unlock the mutex.
*
* @param[in] mutex is a pointer to the mutex to unlock.
*
* @retval 0 Successful operation.
* @retval EIO An error occurred.
*/
static inline int
rtems_rfs_mutex_unlock (rtems_rfs_mutex* mutex)
{
#if __rtems__
rtems_recursive_mutex_unlock(mutex);
#endif
return 0;
}
#endif
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