TaskProcessor.h revision 5dc7fa709646799a5207a5d217f70aa02bf4a3aa 
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_PROCESSOR_H
18#define ANDROID_HWUI_TASK_PROCESSOR_H
19
20#include <utils/RefBase.h>
21
22#include "Task.h"
23#include "TaskManager.h"
24
25namespace android {
26namespace uirenderer {
27
28class TaskProcessorBase: public RefBase {
29public:
30    TaskProcessorBase() { }
31    virtual ~TaskProcessorBase() { };
32
33private:
34    friend class TaskManager;
35
36    virtual void process(const sp<TaskBase>& task) = 0;
37};
38
39template<typename T>
40class TaskProcessor: public TaskProcessorBase {
41public:
42    TaskProcessor(TaskManager* manager): mManager(manager) { }
43    virtual ~TaskProcessor() { }
44
45    bool add(const sp<Task<T> >& task);
46
47    virtual void onProcess(const sp<Task<T> >& task) = 0;
48
49private:
50    virtual void process(const sp<TaskBase>& task) {
51        sp<Task<T> > realTask = static_cast<Task<T>* >(task.get());
52        // This is the right way to do it but sp<> doesn't play nice
53        // sp<Task<T> > realTask = static_cast<sp<Task<T> > >(task);
54        onProcess(realTask);
55    }
56
57    TaskManager* mManager;
58};
59
60template<typename T>
61bool TaskProcessor<T>::add(const sp<Task<T> >& task) {
62    if (mManager) {
63        sp<TaskProcessor<T> > self(this);
64        return mManager->addTask(task, self);
65    }
66    return false;
67}
68
69}; // namespace uirenderer
70}; // namespace android
71
72#endif // ANDROID_HWUI_TASK_PROCESSOR_H
73