1 /* 2 * Copyright (C) 2013 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_HWUI_TASK_MANAGER_H 18 #define ANDROID_HWUI_TASK_MANAGER_H 19 20 #include <utils/Mutex.h> 21 #include <utils/String8.h> 22 #include <utils/Thread.h> 23 #include <utils/Vector.h> 24 25 #include "Signal.h" 26 27 namespace android { 28 namespace uirenderer { 29 30 template <typename T> 31 class Task; 32 class TaskBase; 33 34 template <typename T> 35 class TaskProcessor; 36 class TaskProcessorBase; 37 38 class TaskManager { 39 public: 40 TaskManager(); 41 ~TaskManager(); 42 43 /** 44 * Returns true if this task manager can run tasks, 45 * false otherwise. This method will typically return 46 * false on a single CPU core device. 47 */ 48 bool canRunTasks() const; 49 50 /** 51 * Stops all allocated threads. Adding tasks will start 52 * the threads again as necessary. 53 */ 54 void stop(); 55 56 private: 57 template <typename T> 58 friend class TaskProcessor; 59 60 template<typename T> addTask(const sp<Task<T>> & task,const sp<TaskProcessor<T>> & processor)61 bool addTask(const sp<Task<T> >& task, const sp<TaskProcessor<T> >& processor) { 62 return addTaskBase(sp<TaskBase>(task), sp<TaskProcessorBase>(processor)); 63 } 64 65 bool addTaskBase(const sp<TaskBase>& task, const sp<TaskProcessorBase>& processor); 66 67 struct TaskWrapper { TaskWrapperTaskWrapper68 TaskWrapper(): mTask(), mProcessor() { } 69 TaskWrapperTaskWrapper70 TaskWrapper(const sp<TaskBase>& task, const sp<TaskProcessorBase>& processor): 71 mTask(task), mProcessor(processor) { 72 } 73 74 sp<TaskBase> mTask; 75 sp<TaskProcessorBase> mProcessor; 76 }; 77 78 class WorkerThread: public Thread { 79 public: WorkerThread(const String8 name)80 WorkerThread(const String8 name): mSignal(Condition::WAKE_UP_ONE), mName(name) { } 81 82 bool addTask(TaskWrapper task); 83 size_t getTaskCount() const; 84 void exit(); 85 86 private: 87 virtual status_t readyToRun(); 88 virtual bool threadLoop(); 89 90 // Lock for the list of tasks 91 mutable Mutex mLock; 92 Vector<TaskWrapper> mTasks; 93 94 // Signal used to wake up the thread when a new 95 // task is available in the list 96 mutable Signal mSignal; 97 98 const String8 mName; 99 }; 100 101 Vector<sp<WorkerThread> > mThreads; 102 }; 103 104 }; // namespace uirenderer 105 }; // namespace android 106 107 #endif // ANDROID_HWUI_TASK_MANAGER_H 108