ALooperRoster.h revision 9bd0ba2898bd0c0439ecd863433f9f9c3f0d5126 
1/*
2 * Copyright (C) 2010 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 A_LOOPER_ROSTER_H_
18
19#define A_LOOPER_ROSTER_H_
20
21#include <media/stagefright/foundation/ALooper.h>
22#include <utils/KeyedVector.h>
23
24namespace android {
25
26struct ALooperRoster {
27    ALooperRoster();
28
29    ALooper::handler_id registerHandler(
30            const sp<ALooper> looper, const sp<AHandler> &handler);
31
32    void unregisterHandler(ALooper::handler_id handlerID);
33    void unregisterStaleHandlers();
34
35    status_t postMessage(const sp<AMessage> &msg, int64_t delayUs = 0);
36    void deliverMessage(const sp<AMessage> &msg);
37
38    status_t postAndAwaitResponse(
39            const sp<AMessage> &msg, sp<AMessage> *response);
40
41    void postReply(uint32_t replyID, const sp<AMessage> &reply);
42
43    sp<ALooper> findLooper(ALooper::handler_id handlerID);
44
45private:
46    struct HandlerInfo {
47        wp<ALooper> mLooper;
48        wp<AHandler> mHandler;
49    };
50
51    Mutex mLock;
52    KeyedVector<ALooper::handler_id, HandlerInfo> mHandlers;
53    ALooper::handler_id mNextHandlerID;
54    uint32_t mNextReplyID;
55    Condition mRepliesCondition;
56
57    KeyedVector<uint32_t, sp<AMessage> > mReplies;
58
59    DISALLOW_EVIL_CONSTRUCTORS(ALooperRoster);
60};
61
62}  // namespace android
63
64#endif  // A_LOOPER_ROSTER_H_
65