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/*
* Copyright (C) 2013 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_HWUI_TASK_MANAGER_H
#define ANDROID_HWUI_TASK_MANAGER_H
#include <utils/Mutex.h>
#include <utils/String8.h>
#include <utils/Thread.h>
#include "Signal.h"
#include <vector>
namespace android {
namespace uirenderer {
template <typename T>
class Task;
class TaskBase;
template <typename T>
class TaskProcessor;
class TaskProcessorBase;
class TaskManager {
public:
TaskManager();
~TaskManager();
/**
* Returns true if this task manager can run tasks,
* false otherwise. This method will typically return
* false on a single CPU core device.
*/
bool canRunTasks() const;
/**
* Stops all allocated threads. Adding tasks will start
* the threads again as necessary.
*/
void stop();
private:
template <typename T>
friend class TaskProcessor;
template<typename T>
bool addTask(const sp<Task<T> >& task, const sp<TaskProcessor<T> >& processor) {
return addTaskBase(sp<TaskBase>(task), sp<TaskProcessorBase>(processor));
}
bool addTaskBase(const sp<TaskBase>& task, const sp<TaskProcessorBase>& processor);
struct TaskWrapper {
TaskWrapper(): mTask(), mProcessor() { }
TaskWrapper(const sp<TaskBase>& task, const sp<TaskProcessorBase>& processor):
mTask(task), mProcessor(processor) {
}
sp<TaskBase> mTask;
sp<TaskProcessorBase> mProcessor;
};
class WorkerThread: public Thread {
public:
explicit WorkerThread(const String8& name): mSignal(Condition::WAKE_UP_ONE), mName(name) { }
bool addTask(const TaskWrapper& task);
size_t getTaskCount() const;
void exit();
private:
virtual status_t readyToRun() override;
virtual bool threadLoop() override;
// Lock for the list of tasks
mutable Mutex mLock;
std::vector<TaskWrapper> mTasks;
// Signal used to wake up the thread when a new
// task is available in the list
mutable Signal mSignal;
const String8 mName;
};
std::vector<sp<WorkerThread> > mThreads;
};
}; // namespace uirenderer
}; // namespace android
#endif // ANDROID_HWUI_TASK_MANAGER_H
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