1*05767d91SRobert Wu /* 2*05767d91SRobert Wu * Copyright 2015 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_FIFOCONTROLLER_H 18*05767d91SRobert Wu #define NATIVEOBOE_FIFOCONTROLLER_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 contained in the class. 29*05767d91SRobert Wu */ 30*05767d91SRobert Wu class FifoController : public FifoControllerBase 31*05767d91SRobert Wu { 32*05767d91SRobert Wu public: 33*05767d91SRobert Wu FifoController(uint32_t bufferSize); 34*05767d91SRobert Wu virtual ~FifoController() = default; 35*05767d91SRobert Wu getReadCounter()36*05767d91SRobert Wu virtual uint64_t getReadCounter() const override { 37*05767d91SRobert Wu return mReadCounter.load(std::memory_order_acquire); 38*05767d91SRobert Wu } setReadCounter(uint64_t n)39*05767d91SRobert Wu virtual void setReadCounter(uint64_t n) override { 40*05767d91SRobert Wu mReadCounter.store(n, std::memory_order_release); 41*05767d91SRobert Wu } incrementReadCounter(uint64_t n)42*05767d91SRobert Wu virtual void incrementReadCounter(uint64_t n) override { 43*05767d91SRobert Wu mReadCounter.fetch_add(n, std::memory_order_acq_rel); 44*05767d91SRobert Wu } getWriteCounter()45*05767d91SRobert Wu virtual uint64_t getWriteCounter() const override { 46*05767d91SRobert Wu return mWriteCounter.load(std::memory_order_acquire); 47*05767d91SRobert Wu } setWriteCounter(uint64_t n)48*05767d91SRobert Wu virtual void setWriteCounter(uint64_t n) override { 49*05767d91SRobert Wu mWriteCounter.store(n, std::memory_order_release); 50*05767d91SRobert Wu } incrementWriteCounter(uint64_t n)51*05767d91SRobert Wu virtual void incrementWriteCounter(uint64_t n) override { 52*05767d91SRobert Wu mWriteCounter.fetch_add(n, std::memory_order_acq_rel); 53*05767d91SRobert Wu } 54*05767d91SRobert Wu 55*05767d91SRobert Wu private: 56*05767d91SRobert Wu std::atomic<uint64_t> mReadCounter{}; 57*05767d91SRobert Wu std::atomic<uint64_t> mWriteCounter{}; 58*05767d91SRobert Wu }; 59*05767d91SRobert Wu 60*05767d91SRobert Wu } // namespace oboe 61*05767d91SRobert Wu 62*05767d91SRobert Wu #endif //NATIVEOBOE_FIFOCONTROLLER_H 63