1 /* 2 * Copyright (C) 2016 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 AAUDIO_THREAD_H 18 #define AAUDIO_THREAD_H 19 20 #include <atomic> 21 #include <pthread.h> 22 23 #include <aaudio/AAudio.h> 24 25 namespace aaudio { 26 27 /** 28 * Abstract class similar to Java Runnable. 29 */ 30 class Runnable { 31 public: 32 Runnable() {}; 33 virtual ~Runnable() = default; 34 35 virtual void run() = 0; 36 }; 37 38 /** 39 * Abstraction for a host dependent thread. 40 * TODO Consider using Android "Thread" class or std::thread instead. 41 */ 42 class AAudioThread 43 { 44 public: 45 AAudioThread(); 46 AAudioThread(Runnable *runnable); 47 virtual ~AAudioThread() = default; 48 49 /** 50 * Start the thread running. 51 */ 52 aaudio_result_t start(Runnable *runnable = nullptr); 53 54 /** 55 * Join the thread. 56 * The caller must somehow tell the thread to exit before calling join(). 57 */ 58 aaudio_result_t stop(); 59 60 /** 61 * This will get called in the thread. 62 * Override this or pass a Runnable to start(). 63 */ 64 virtual void run() {}; 65 66 void dispatch(); // called internally from 'C' thread wrapper 67 68 private: 69 Runnable *mRunnable; 70 bool mHasThread; 71 pthread_t mThread; // initialized in constructor 72 73 }; 74 75 } /* namespace aaudio */ 76 77 #endif ///AAUDIO_THREAD_H 78
