| /* |
| * Copyright (C) 2015-2016 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef ANDROID_WORKER_H_ |
| #define ANDROID_WORKER_H_ |
| |
| #include <stdint.h> |
| #include <stdlib.h> |
| |
| #include <condition_variable> |
| #include <mutex> |
| #include <string> |
| #include <thread> |
| |
| namespace android { |
| |
| class Worker { |
| public: |
| void Lock() { |
| mutex_.lock(); |
| } |
| void Unlock() { |
| mutex_.unlock(); |
| } |
| |
| void Signal() { |
| cond_.notify_all(); |
| } |
| void Exit(); |
| |
| bool initialized() const { |
| return initialized_; |
| } |
| |
| protected: |
| Worker(const char *name, int priority); |
| virtual ~Worker(); |
| |
| int InitWorker(); |
| virtual void Routine() = 0; |
| |
| /* |
| * Must be called with the lock acquired. max_nanoseconds may be negative to |
| * indicate infinite timeout, otherwise it indicates the maximum time span to |
| * wait for a signal before returning. |
| * Returns -EINTR if interrupted by exit request, or -ETIMEDOUT if timed out |
| */ |
| int WaitForSignalOrExitLocked(int64_t max_nanoseconds = -1); |
| |
| bool should_exit() const { |
| return exit_; |
| } |
| |
| std::mutex mutex_; |
| std::condition_variable cond_; |
| |
| private: |
| void InternalRoutine(); |
| |
| std::string name_; |
| int priority_; |
| |
| std::unique_ptr<std::thread> thread_; |
| bool exit_; |
| bool initialized_; |
| }; |
| } // namespace android |
| #endif |