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