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/*
* Copyright (C) 2019 The Android Open Source Project
*
* 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.
*/
#ifndef CHRE_PLATFORM_FREERTOS_MUTEX_BASE_H_
#define CHRE_PLATFORM_FREERTOS_MUTEX_BASE_H_
#include "chre/platform/fatal_error.h"
#include "chre/platform/log.h"
#include "FreeRTOS.h"
#include "semphr.h"
namespace chre {
/**
* The FreeRTOS implementation of MutexBase
*/
class MutexBase {
protected:
SemaphoreHandle_t mSemaphoreHandle;
/**
* Initialize the mutex handle using a static semaphore
* to avoid heap allocations
*/
void initStaticMutex() {
mSemaphoreHandle = xSemaphoreCreateMutexStatic(&mStaticSemaphore);
if (mSemaphoreHandle == NULL) {
FATAL_ERROR("Failed to initialize mutex");
}
}
private:
StaticSemaphore_t mStaticSemaphore;
};
} // namespace chre
#endif // CHRE_PLATFORM_FREERTOS_MUTEX_BASE_H_