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/**
* @file
*
* @ingroup RTEMSScoreMutex
*
* @brief This header file provides interfaces of the
* @ref RTEMSScoreMutex which are used by the implementation and the
* @ref RTEMSImplApplConfig.
*/
/*
* COPYRIGHT (c) 1989-2011.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#ifndef _RTEMS_SCORE_COREMUTEX_H
#define _RTEMS_SCORE_COREMUTEX_H
#include <rtems/score/thread.h>
#include <rtems/score/threadq.h>
#include <rtems/score/priority.h>
#include <rtems/score/watchdog.h>
#include <rtems/score/interr.h>
struct _Scheduler_Control;
#ifdef __cplusplus
extern "C" {
#endif
/**
* @defgroup RTEMSScoreMutex Mutex Handler
*
* @ingroup RTEMSScore
*
* @brief This group contains the Mutex Handler implementation.
*
* This handler encapsulates functionality which provides the foundation
* Mutex services used in all of the APIs supported by RTEMS. A mutex is an
* enhanced version of the standard Dijkstra binary semaphore used to provide
* synchronization and mutual exclusion capabilities.
*
* @{
*/
/**
* @brief Control block used to manage each mutex.
*
* The following defines the control block used to manage each mutex.
*/
typedef struct {
/**
* @brief The thread queue of this mutex.
*
* The owner of the thread queue indicates the mutex owner.
*/
Thread_queue_Control Wait_queue;
} CORE_mutex_Control;
/**
* @brief The recursive mutex control.
*/
typedef struct {
/**
* @brief The plain non-recursive mutex.
*/
CORE_mutex_Control Mutex;
/**
* @brief The nest level in case of a recursive seize.
*/
unsigned int nest_level;
} CORE_recursive_mutex_Control;
/**
* @brief The recursive mutex control with priority ceiling protocol support.
*/
typedef struct {
/**
* @brief The plain recursive mutex.
*/
CORE_recursive_mutex_Control Recursive;
/**
* @brief The priority ceiling node for the mutex owner.
*/
Priority_Node Priority_ceiling;
#if defined(RTEMS_SMP)
/**
* @brief The scheduler instance for this priority ceiling mutex.
*/
const struct _Scheduler_Control *scheduler;
#endif
} CORE_ceiling_mutex_Control;
/** @} */
#ifdef __cplusplus
}
#endif
#endif
/* end of include file */
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