1*05767d91SRobert Wu /* 2*05767d91SRobert Wu * Copyright 2016 The Android Open Source Project 3*05767d91SRobert Wu * 4*05767d91SRobert Wu * Licensed under the Apache License, Version 2.0 (the "License"); 5*05767d91SRobert Wu * you may not use this file except in compliance with the License. 6*05767d91SRobert Wu * You may obtain a copy of the License at 7*05767d91SRobert Wu * 8*05767d91SRobert Wu * http://www.apache.org/licenses/LICENSE-2.0 9*05767d91SRobert Wu * 10*05767d91SRobert Wu * Unless required by applicable law or agreed to in writing, software 11*05767d91SRobert Wu * distributed under the License is distributed on an "AS IS" BASIS, 12*05767d91SRobert Wu * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13*05767d91SRobert Wu * See the License for the specific language governing permissions and 14*05767d91SRobert Wu * limitations under the License. 15*05767d91SRobert Wu */ 16*05767d91SRobert Wu 17*05767d91SRobert Wu #ifndef NATIVEOBOE_FIFOCONTROLLERINDIRECT_H 18*05767d91SRobert Wu #define NATIVEOBOE_FIFOCONTROLLERINDIRECT_H 19*05767d91SRobert Wu 20*05767d91SRobert Wu #include <atomic> 21*05767d91SRobert Wu #include <stdint.h> 22*05767d91SRobert Wu 23*05767d91SRobert Wu #include "oboe/FifoControllerBase.h" 24*05767d91SRobert Wu 25*05767d91SRobert Wu namespace oboe { 26*05767d91SRobert Wu 27*05767d91SRobert Wu /** 28*05767d91SRobert Wu * A FifoControllerBase with counters external to the class. 29*05767d91SRobert Wu */ 30*05767d91SRobert Wu class FifoControllerIndirect : public FifoControllerBase { 31*05767d91SRobert Wu 32*05767d91SRobert Wu public: 33*05767d91SRobert Wu FifoControllerIndirect(uint32_t bufferSize, 34*05767d91SRobert Wu std::atomic<uint64_t> *readCounterAddress, 35*05767d91SRobert Wu std::atomic<uint64_t> *writeCounterAddress); 36*05767d91SRobert Wu virtual ~FifoControllerIndirect() = default; 37*05767d91SRobert Wu getReadCounter()38*05767d91SRobert Wu virtual uint64_t getReadCounter() const override { 39*05767d91SRobert Wu return mReadCounterAddress->load(std::memory_order_acquire); 40*05767d91SRobert Wu } setReadCounter(uint64_t n)41*05767d91SRobert Wu virtual void setReadCounter(uint64_t n) override { 42*05767d91SRobert Wu mReadCounterAddress->store(n, std::memory_order_release); 43*05767d91SRobert Wu } incrementReadCounter(uint64_t n)44*05767d91SRobert Wu virtual void incrementReadCounter(uint64_t n) override { 45*05767d91SRobert Wu mReadCounterAddress->fetch_add(n, std::memory_order_acq_rel); 46*05767d91SRobert Wu } getWriteCounter()47*05767d91SRobert Wu virtual uint64_t getWriteCounter() const override { 48*05767d91SRobert Wu return mWriteCounterAddress->load(std::memory_order_acquire); 49*05767d91SRobert Wu } setWriteCounter(uint64_t n)50*05767d91SRobert Wu virtual void setWriteCounter(uint64_t n) override { 51*05767d91SRobert Wu mWriteCounterAddress->store(n, std::memory_order_release); 52*05767d91SRobert Wu } incrementWriteCounter(uint64_t n)53*05767d91SRobert Wu virtual void incrementWriteCounter(uint64_t n) override { 54*05767d91SRobert Wu mWriteCounterAddress->fetch_add(n, std::memory_order_acq_rel); 55*05767d91SRobert Wu } 56*05767d91SRobert Wu 57*05767d91SRobert Wu private: 58*05767d91SRobert Wu 59*05767d91SRobert Wu std::atomic<uint64_t> *mReadCounterAddress; 60*05767d91SRobert Wu std::atomic<uint64_t> *mWriteCounterAddress; 61*05767d91SRobert Wu 62*05767d91SRobert Wu }; 63*05767d91SRobert Wu 64*05767d91SRobert Wu } // namespace oboe 65*05767d91SRobert Wu 66*05767d91SRobert Wu #endif //NATIVEOBOE_FIFOCONTROLLERINDIRECT_H 67