85 lines
2.5 KiB
C
85 lines
2.5 KiB
C
/*
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ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio.
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This file is part of ChibiOS/RT.
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ChibiOS/RT is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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ChibiOS/RT is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file mutexes.h
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* @brief Mutexes macros and structures.
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* @addtogroup mutexes
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* @{
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*/
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#ifndef _MUTEXES_H_
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#define _MUTEXES_H_
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#if CH_USE_MUTEXES
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/**
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* @brief Mutex structure.
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*/
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typedef struct Mutex {
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ThreadsQueue m_queue; /**< Queue of the threads sleeping on
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this Mutex.*/
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Thread *m_owner; /**< Owner @p Thread pointer or
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@p NULL.*/
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struct Mutex *m_next; /**< Next @p Mutex into an owner-list
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or @p NULL.*/
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} Mutex;
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#ifdef __cplusplus
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extern "C" {
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#endif
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void chMtxInit(Mutex *mp);
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void chMtxLock(Mutex *mp);
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void chMtxLockS(Mutex *mp);
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bool_t chMtxTryLock(Mutex *mp);
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bool_t chMtxTryLockS(Mutex *mp);
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Mutex *chMtxUnlock(void);
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Mutex *chMtxUnlockS(void);
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void chMtxUnlockAll(void);
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#ifdef __cplusplus
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}
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#endif
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/**
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* @brief Data part of a static mutex initializer.
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* @details This macro should be used when statically initializing a mutex
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* that is part of a bigger structure.
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* @param name the name of the mutex variable
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*/
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#define _MUTEX_DATA(name) {_THREADSQUEUE_DATA(name.m_queue), NULL, NULL}
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/**
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* @brief Static mutex initializer.
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* @details Statically initialized mutexes require no explicit initialization
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* using @p chMtxInit().
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* @param name the name of the mutex variable
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*/
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#define MUTEX_DECL(name) Mutex name = _MUTEX_DATA(name)
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/**
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* Returns @p TRUE if the mutex queue contains at least a waiting thread.
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*/
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#define chMtxQueueNotEmptyS(mp) notempty(&(mp)->m_queue)
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#endif /* CH_USE_MUTEXES */
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#endif /* _MUTEXES_H_ */
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/** @} */
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