ALooperRoster.h revision fa8b4792228083a4c95e8bd1c28690d44bb48bd6 
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#include <utils/String16.h>
24
25namespace android {
26
27struct ALooperRoster {
28    ALooperRoster();
29
30    ALooper::handler_id registerHandler(
31            const sp<ALooper> looper, const sp<AHandler> &handler);
32
33    void unregisterHandler(ALooper::handler_id handlerID);
34    void unregisterStaleHandlers();
35
36    status_t postAndAwaitResponse(
37            const sp<AMessage> &msg, sp<AMessage> *response);
38
39    void postReply(uint32_t replyID, const sp<AMessage> &reply);
40
41    void dump(int fd, const Vector<String16>& args);
42
43private:
44    struct HandlerInfo {
45        wp<ALooper> mLooper;
46        wp<AHandler> mHandler;
47    };
48
49    Mutex mLock;
50    KeyedVector<ALooper::handler_id, HandlerInfo> mHandlers;
51    ALooper::handler_id mNextHandlerID;
52    uint32_t mNextReplyID;
53    Condition mRepliesCondition;
54
55    KeyedVector<uint32_t, sp<AMessage> > mReplies;
56
57    DISALLOW_EVIL_CONSTRUCTORS(ALooperRoster);
58};
59
60}  // namespace android
61
62#endif  // A_LOOPER_ROSTER_H_
63