ESP-IDF
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Outline
#include "osi/mutex.h"
gl_mutex
osi_mutex_new(osi_mutex_t *)
osi_mutex_lock(osi_mutex_t *, uint32_t)
osi_mutex_unlock(osi_mutex_t *)
osi_mutex_free(osi_mutex_t *)
osi_mutex_global_init()
osi_mutex_global_deinit()
osi_mutex_global_lock()
osi_mutex_global_unlock()
Files
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SourceVuESP-IDF Framework and ExamplesESP-IDFcomponents/bt/common/osi/mutex.c
 
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/****************************************************************************** * * Copyright (C) 2015 Google, Inc. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * ******************************************************************************//* ... */ #include "osi/mutex.h" /* static section */ static osi_mutex_t gl_mutex; /* Recursive Type */ /** Create a new mutex * @param mutex pointer to the mutex to create * @return a new mutex *//* ... */ int osi_mutex_new(osi_mutex_t *mutex) { int xReturn = -1; *mutex = xSemaphoreCreateMutex(); if (*mutex != NULL) { xReturn = 0; }{...} return xReturn; }{ ... } /** Lock a mutex * @param mutex the mutex to lock *//* ... */ int osi_mutex_lock(osi_mutex_t *mutex, uint32_t timeout) { int ret = 0; if (timeout == OSI_MUTEX_MAX_TIMEOUT) { if (xSemaphoreTake(*mutex, portMAX_DELAY) != pdTRUE) { ret = -1; }{...} }{...} else { if (xSemaphoreTake(*mutex, timeout / portTICK_PERIOD_MS) != pdTRUE) { ret = -2; }{...} }{...} return ret; }{ ... } /** Unlock a mutex * @param mutex the mutex to unlock *//* ... */ void osi_mutex_unlock(osi_mutex_t *mutex) { xSemaphoreGive(*mutex); }{ ... } /** Delete a semaphore * @param mutex the mutex to delete *//* ... */ void osi_mutex_free(osi_mutex_t *mutex) { vSemaphoreDelete(*mutex); *mutex = NULL; }{ ... } int osi_mutex_global_init(void) { gl_mutex = xSemaphoreCreateRecursiveMutex(); if (gl_mutex == NULL) { return -1; }{...} return 0; }{ ... } void osi_mutex_global_deinit(void) { vSemaphoreDelete(gl_mutex); }{ ... } void osi_mutex_global_lock(void) { xSemaphoreTakeRecursive(gl_mutex, portMAX_DELAY); }{ ... } void osi_mutex_global_unlock(void) { xSemaphoreGiveRecursive(gl_mutex); }{ ... }
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