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-rw-r--r--src/include/semaphores.h99
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diff --git a/src/include/semaphores.h b/src/include/semaphores.h
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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/>.
-*/
-
-/**
- * @file semaphores.h
- * @brief Semaphores macros and structures.
- * @addtogroup Semaphores
- * @{
- */
-
-#ifndef _SEMAPHORES_H_
-#define _SEMAPHORES_H_
-
-#if CH_USE_SEMAPHORES
-
-/**
- * @brief Semaphore structure.
- */
-typedef struct Semaphore {
- ThreadsQueue s_queue; /**< Queue of the threads sleeping on
- this semaphore.*/
- cnt_t s_cnt; /**< The semaphore counter.*/
-} Semaphore;
-
-#ifdef __cplusplus
-extern "C" {
-#endif
- void chSemInit(Semaphore *sp, cnt_t n);
- void chSemReset(Semaphore *sp, cnt_t n);
- void chSemResetI(Semaphore *sp, cnt_t n);
- msg_t chSemWait(Semaphore *sp);
- msg_t chSemWaitS(Semaphore *sp);
- msg_t chSemWaitTimeout(Semaphore *sp, systime_t time);
- msg_t chSemWaitTimeoutS(Semaphore *sp, systime_t time);
- void chSemSignal(Semaphore *sp);
- void chSemSignalI(Semaphore *sp);
-#if CH_USE_SEMSW
- msg_t chSemSignalWait(Semaphore *sps, Semaphore *spw);
-#endif
-#ifdef __cplusplus
-}
-#endif
-
-/**
- * @brief Data part of a static semaphore initializer.
- * @details This macro should be used when statically initializing a semaphore
- * that is part of a bigger structure.
- * @param name the name of the semaphore variable
- * @param n the counter initial value, this value must be non-negative
- */
-#define _SEMAPHORE_DATA(name, n) {_THREADSQUEUE_DATA(name.s_queue), n}
-
-/**
- * @brief Static semaphore initializer.
- * @details Statically initialized semaphores require no explicit initialization
- * using @p chSemInit().
- * @param name the name of the semaphore variable
- * @param n the counter initial value, this value must be non-negative
- */
-#define SEMAPHORE_DECL(name, n) Semaphore name = _SEMAPHORE_DATA(name, n)
-
-/**
- * Decreases the semaphore counter, this macro can be used when it is ensured
- * that the counter would not become negative.
- */
-#define chSemFastWaitI(sp) ((sp)->s_cnt--)
-
-/**
- * Increases the semaphore counter, this macro can be used when the counter is
- * not negative.
- */
-#define chSemFastSignalI(sp) ((sp)->s_cnt++)
-
-/**
- * Returns the semaphore counter current value.
- */
-#define chSemGetCounterI(sp) ((sp)->s_cnt)
-
-#endif /* CH_USE_SEMAPHORES */
-
-#endif /* _SEMAPHORES_H_ */
-
-/** @} */