| /* |
| * Copyright (c) 2015-2016, Texas Instruments Incorporated |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * * Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * * Neither the name of Texas Instruments Incorporated nor the names of |
| * its contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
| * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
| * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, |
| * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| /* |
| * ======== MutexP_freertos.c ======== |
| */ |
| |
| #include <ti/drivers/dpl/MutexP.h> |
| |
| #include <FreeRTOS.h> |
| #include <semphr.h> |
| #include <queue.h> |
| |
| |
| /* |
| * ======== MutexP_create ======== |
| */ |
| MutexP_Handle MutexP_create(MutexP_Params *params) |
| { |
| SemaphoreHandle_t sem = NULL; |
| |
| /* |
| * NOTE: Documentation in semphr.h says that configUSE_RECURSIVE_MUTEXES |
| * must be set to 1 in FreeRTOSConfig.h for this to be available, but |
| * the xSemaphore recursive calls are inside a configUSE_RECURSIVE_MUTEXES |
| * block. |
| */ |
| sem = xSemaphoreCreateRecursiveMutex(); |
| |
| return ((MutexP_Handle)sem); |
| } |
| |
| /* |
| * ======== MutexP_delete ======== |
| */ |
| MutexP_Status MutexP_delete(MutexP_Handle handle) |
| { |
| vSemaphoreDelete((SemaphoreHandle_t)handle); |
| |
| return (MutexP_OK); |
| } |
| |
| /* |
| * ======== MutexP_lock ======== |
| */ |
| uintptr_t MutexP_lock(MutexP_Handle handle) |
| { |
| SemaphoreHandle_t xMutex = (SemaphoreHandle_t)handle; |
| |
| /* Retry every 10 ticks */ |
| while (xSemaphoreTakeRecursive(xMutex, (TickType_t)10) == pdFALSE) { |
| ; |
| } |
| |
| return (0); |
| } |
| |
| /* |
| * ======== MutexP_Params_init ======== |
| */ |
| void MutexP_Params_init(MutexP_Params *params) |
| { |
| params->name = NULL; |
| params->callback = NULL; |
| } |
| |
| /* |
| * ======== MutexP_unlock ======== |
| */ |
| void MutexP_unlock(MutexP_Handle handle, uintptr_t key) |
| { |
| SemaphoreHandle_t xMutex = (SemaphoreHandle_t)handle; |
| xSemaphoreGiveRecursive(xMutex); |
| } |