109 lines
2.9 KiB
C
109 lines
2.9 KiB
C
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/* ----> DO NOT REMOVE THE FOLLOWING NOTICE <----
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Copyright (c) 2014-2017 Datalight, Inc.
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All Rights Reserved Worldwide.
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This program 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; use version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but "AS-IS," WITHOUT ANY WARRANTY; without even the implied warranty
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of 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 along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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/* Businesses and individuals that for commercial or other reasons cannot
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comply with the terms of the GPLv2 license may obtain a commercial license
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before incorporating Reliance Edge into proprietary software for
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distribution in any form. Visit http://www.datalight.com/reliance-edge for
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more information.
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*/
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/** @file
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@brief Implements a synchronization object to provide mutual exclusion.
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*/
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#include "ch.h"
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#include "hal.h"
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#if (HAL_USE_SDMMC == TRUE)
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#include "sama_sdmmc_lld.h"
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#if SDMMC_USE_RELEDGE_LIB == 1
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#include <redfs.h>
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#include <redosdeviations.h>
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#if REDCONF_TASK_COUNT > 1U
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static semaphore_t red_sem;
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/** @brief Initialize the mutex.
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After initialization, the mutex is in the released state.
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The behavior of calling this function when the mutex is still initialized
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is undefined.
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@return A negated ::REDSTATUS code indicating the operation result.
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@retval 0 Operation was successful.
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*/
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REDSTATUS RedOsMutexInit(void)
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{
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chSemObjectInit(&red_sem, 1);
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return 0;
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}
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/** @brief Uninitialize the mutex.
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The behavior of calling this function when the mutex is not initialized is
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undefined; likewise, the behavior of uninitializing the mutex when it is
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in the acquired state is undefined.
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@return A negated ::REDSTATUS code indicating the operation result.
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@retval 0 Operation was successful.
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*/
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REDSTATUS RedOsMutexUninit(void)
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{
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chSemReset(&red_sem, 0);
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return 0;
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}
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/** @brief Acquire the mutex.
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The behavior of calling this function when the mutex is not initialized is
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undefined; likewise, the behavior of recursively acquiring the mutex is
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undefined.
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*/
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void RedOsMutexAcquire(void)
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{
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chSemWaitTimeout(&red_sem, TIME_INFINITE);
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}
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/** @brief Release the mutex.
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The behavior is undefined in the following cases:
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- Releasing the mutex when the mutex is not initialized.
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- Releasing the mutex when it is not in the acquired state.
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- Releasing the mutex from a task or thread other than the one which
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acquired the mutex.
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*/
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void RedOsMutexRelease(void)
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{
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chSemSignal(&red_sem);
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}
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#endif
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#endif
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#endif
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