1 /* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ANDROID_RS_FIFO_H 18 #define ANDROID_RS_FIFO_H 19 20 21 #include "rsUtils.h" 22 23 namespace android { 24 namespace renderscript { 25 26 27 // A simple FIFO to be used as a producer / consumer between two 28 // threads. One is writer and one is reader. The common cases 29 // will not require locking. It is not threadsafe for multiple 30 // readers or writers by design. 31 32 class Fifo { 33 protected: 34 Fifo(); 35 virtual ~Fifo(); 36 37 public: 38 bool virtual writeAsync(const void *data, size_t bytes, bool waitForSpace = true) = 0; 39 void virtual writeWaitReturn(void *ret, size_t retSize) = 0; 40 size_t virtual read(void *data, size_t bytes, bool doWait = true, uint64_t timeToWait = 0) = 0; 41 void virtual readReturn(const void *data, size_t bytes) = 0; 42 43 void virtual flush() = 0; 44 45 }; 46 47 } 48 } 49 #endif 50