Line-Following-Robot/Input/Externals/raspicam-master/dependencies/vcos/vcos_reentrant_mutex.h

/*
Copyright (c) 2012, Broadcom Europe Ltd
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.
    * Neither the name of the copyright holder nor the
      names of its contributors may be used to endorse or promote products
      derived from this software without specific prior written permission.

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 HOLDER 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.
*/

/*=============================================================================
VideoCore OS Abstraction Layer - reentrant mutex public header file
=============================================================================*/

#ifndef VCOS_REENTRANT_MUTEX_H
#define VCOS_REENTRANT_MUTEX_H

#ifdef __cplusplus
extern "C" {
#endif

#include "vcos_types.h"
#include "pthreads/vcos_platform.h"

/**
 * \file
 *
 * Reentrant Mutex API. You can take one of these mutexes even if you've already
 * taken it. Just to make sure.
 *
 * A re-entrant mutex may be slower on some platforms than a regular one.
 *
 * \sa vcos_mutex.h
 *
 */

/** Create a mutex.
  *
  * @param m      Filled in with mutex on return
  * @param name   A non-null name for the mutex, used for diagnostics.
  *
  * @return VCOS_SUCCESS if mutex was created, or error code.
  */
VCOS_INLINE_DECL
VCOS_STATUS_T vcos_reentrant_mutex_create(VCOS_REENTRANT_MUTEX_T *m, const char *name);

/** Delete the mutex.
  */
VCOS_INLINE_DECL
void vcos_reentrant_mutex_delete(VCOS_REENTRANT_MUTEX_T *m);

/** Wait to claim the mutex. Must not have already been claimed by the current thread.
  */
#ifndef vcos_reentrant_mutexlock
VCOS_INLINE_DECL
void vcos_reentrant_mutex_lock(VCOS_REENTRANT_MUTEX_T *m);

/** Release the mutex.
  */
VCOS_INLINE_DECL
void vcos_reentrant_mutex_unlock(VCOS_REENTRANT_MUTEX_T *m);
#endif


#ifdef __cplusplus
}
#endif
#endif