1/*
2 * Copyright (C) 2017 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_H_
18
19#define A_LOOPER_H_
20
21#include <android-base/macros.h>
22#include <utils/Condition.h>
23#include <utils/Mutex.h>
24
25#include <set>
26
27struct ASensorEventQueue;
28
29struct ALooper {
30    ALooper();
31
32    void signalSensorEvents(ASensorEventQueue *queue);
33    void wake();
34
35    int pollOnce(int timeoutMillis, int *outFd, int *outEvents, void **outData);
36
37    void invalidateSensorQueue(ASensorEventQueue *queue);
38
39private:
40    android::Mutex mLock;
41    android::Condition mCondition;
42
43    std::set<ASensorEventQueue *> mReadyQueues;
44    bool mAwoken;
45
46    DISALLOW_COPY_AND_ASSIGN(ALooper);
47};
48
49#endif  // A_LOOPER_H_
50