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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 <utils/Vector.h>
+
+#include "Signal.h"
+
+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
+ * true on a single CPU core device.
+ */
+ bool canRunTasks() const;
+
+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:
+ WorkerThread(const String8 name): mSignal(Condition::WAKE_UP_ONE), mName(name) { }
+
+ bool addTask(TaskWrapper task);
+ size_t getTaskCount() const;
+ void exit();
+
+ private:
+ virtual bool threadLoop();
+
+ // Lock for the list of tasks
+ mutable Mutex mLock;
+ 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;
+ };
+
+ Vector<sp<WorkerThread> > mThreads;
+};
+
+}; // namespace uirenderer
+}; // namespace android
+
+#endif // ANDROID_HWUI_TASK_MANAGER_H