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/*
ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio.
This file is part of ChibiOS/RT.
ChibiOS/RT is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
ChibiOS/RT is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @addtogroup Core
* @{
*/
#ifndef _SYS_H_
#define _SYS_H_
#if defined(CH_USE_REENTRANT_LOCKS) || defined(_DOXYGEN_)
/**
* Enters the ChibiOS/RT system mutual exclusion zone.
* @note The use of system mutual exclusion zone is not recommended in
* the user code, it is a better idea to use the semaphores or mutexes
* instead.
* @note The code of this API is always inlined regardless the
* @p CH_OPTIMIZE_SPEED setting. This function is meant to be used in
* places where the performance is always preferred.
* @see CH_USE_NESTED_LOCKS
*/
#define chSysLockInline() { \
if (currp->p_locks == 0) { \
currp->p_locks++; \
sys_disable(); \
} \
}
/**
* Leaves the ChibiOS/RT system mutual exclusion zone.
* @note The use of system mutual exclusion zone is not recommended in
* the user code, it is a better idea to use the semaphores or mutexes
* instead.
* @note The code of this API is always inlined regardless the
* @p CH_OPTIMIZE_SPEED setting. This function is meant to be used in
* places where the performance is always preferred.
* @see CH_USE_NESTED_LOCKS
*/
#define chSysUnlockInline() { \
if (--currp->p_locks == 0) \
sys_enable(); \
}
#else /* defined(CH_USE_REENTRANT_LOCKS) || defined(_DOXYGEN_) */
#define chSysLockInline() sys_disable()
#define chSysUnlockInline() sys_enable()
#endif /* !defined(CH_USE_REENTRANT_LOCKS) && !defined(_DOXYGEN_) */
#if defined(CH_OPTIMIZE_SPEED)
#define chSysLock() chSysLockInline()
#define chSysUnlock chSysUnlockInline()
#endif /* defined(CH_OPTIMIZE_SPEED) */
#ifdef __cplusplus
extern "C" {
#endif
void chSysInit(void);
void chSysTimerHandlerI(void);
#ifdef __cplusplus
}
#endif
#endif /* _SYS_H_ */
/** @} */
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