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 IMemoryHeap;
32class ISurfaceComposer;
33
34// ---------------------------------------------------------------------------
35
36// This holds our connection to the composer service (i.e. SurfaceFlinger).
37// If the remote side goes away, we will re-establish the connection.
38// Users of this class should not retain the value from
39// getComposerService() for an extended period.
40//
41// (It's not clear that using Singleton is useful here anymore.)
42class ComposerService : public Singleton<ComposerService>
43{
44    sp<ISurfaceComposer> mComposerService;
45    sp<IBinder::DeathRecipient> mDeathObserver;
46    Mutex mLock;
47
48    ComposerService();
49    void connectLocked();
50    void composerServiceDied();
51    friend class Singleton<ComposerService>;
52public:
53
54    // Get a connection to the Composer Service.  This will block until
55    // a connection is established.
56    static sp<ISurfaceComposer> getComposerService();
57};
58
59// ---------------------------------------------------------------------------
60}; // namespace android
61
62#endif // ANDROID_PRIVATE_GUI_COMPOSER_SERVICE_H
63