1/*
2 * Copyright (C) 2011 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_PRIVATE_GUI_COMPOSER_SERVICE_H
18#define ANDROID_PRIVATE_GUI_COMPOSER_SERVICE_H
19
20#include <stdint.h>
21#include <sys/types.h>
22
23#include <utils/Singleton.h>
24#include <utils/StrongPointer.h>
25
26
27namespace android {
28
29// ---------------------------------------------------------------------------
30
31class ISurfaceComposer;
32
33// ---------------------------------------------------------------------------
34
35// This holds our connection to the composer service (i.e. SurfaceFlinger).
36// If the remote side goes away, we will re-establish the connection.
37// Users of this class should not retain the value from
38// getComposerService() for an extended period.
39//
40// (It's not clear that using Singleton is useful here anymore.)
41class ComposerService : public Singleton<ComposerService>
42{
43    sp<ISurfaceComposer> mComposerService;
44    sp<IBinder::DeathRecipient> mDeathObserver;
45    Mutex mLock;
46
47    ComposerService();
48    void connectLocked();
49    void composerServiceDied();
50    friend class Singleton<ComposerService>;
51public:
52
53    // Get a connection to the Composer Service.  This will block until
54    // a connection is established.
55    static sp<ISurfaceComposer> getComposerService();
56};
57
58// ---------------------------------------------------------------------------
59}; // namespace android
60
61#endif // ANDROID_PRIVATE_GUI_COMPOSER_SERVICE_H
62