1 /* 2 * Copyright (C) 2015 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_WORKER_H_ 18 #define ANDROID_WORKER_H_ 19 20 #include <pthread.h> 21 #include <string> 22 23 namespace android { 24 25 class Worker { 26 public: 27 int Lock(); 28 int Unlock(); 29 30 // Must be called with the lock acquired 31 int SignalLocked(); 32 int ExitLocked(); 33 34 // Convenience versions of above, acquires the lock 35 int Signal(); 36 int Exit(); 37 38 protected: 39 Worker(const char *name, int priority); 40 virtual ~Worker(); 41 42 int InitWorker(); 43 44 bool initialized() const; 45 46 virtual void Routine() = 0; 47 48 /* 49 * Must be called with the lock acquired. 50 * Returns -EINTR if interrupted by exit request 51 */ 52 int WaitForSignalOrExitLocked(); 53 54 private: 55 static void *InternalRoutine(void *worker); 56 57 // Must be called with the lock acquired 58 int SignalThreadLocked(bool exit); 59 60 std::string name_; 61 int priority_; 62 63 pthread_t thread_; 64 pthread_mutex_t lock_; 65 pthread_cond_t cond_; 66 67 bool exit_; 68 bool initialized_; 69 }; 70 } 71 72 #endif 73
