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/*
* Copyright 2016 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 NATIVEOBOE_FIFOCONTROLLERINDIRECT_H
#define NATIVEOBOE_FIFOCONTROLLERINDIRECT_H
#include <atomic>
#include <stdint.h>
#include "FifoControllerBase.h"
namespace oboe {
/**
* A FifoControllerBase with counters external to the class.
*/
class FifoControllerIndirect : public FifoControllerBase {
public:
FifoControllerIndirect(uint32_t bufferSize,
std::atomic<uint64_t> *readCounterAddress,
std::atomic<uint64_t> *writeCounterAddress);
virtual ~FifoControllerIndirect() = default;
virtual uint64_t getReadCounter() const override {
return mReadCounterAddress->load(std::memory_order_acquire);
}
virtual void setReadCounter(uint64_t n) override {
mReadCounterAddress->store(n, std::memory_order_release);
}
virtual void incrementReadCounter(uint64_t n) override {
mReadCounterAddress->fetch_add(n, std::memory_order_acq_rel);
}
virtual uint64_t getWriteCounter() const override {
return mWriteCounterAddress->load(std::memory_order_acquire);
}
virtual void setWriteCounter(uint64_t n) override {
mWriteCounterAddress->store(n, std::memory_order_release);
}
virtual void incrementWriteCounter(uint64_t n) override {
mWriteCounterAddress->fetch_add(n, std::memory_order_acq_rel);
}
private:
std::atomic<uint64_t> *mReadCounterAddress;
std::atomic<uint64_t> *mWriteCounterAddress;
};
} // namespace oboe
#endif //NATIVEOBOE_FIFOCONTROLLERINDIRECT_H
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