esp-idf/components/bt/common/osi/mutex.c

100 wiersze
2.2 KiB
C
Czysty Zwykły widok Historia

/******************************************************************************
*
* 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);
}