1/*
2 * Copyright (C) 2009 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 TIME_SOURCE_H_
18
19#define TIME_SOURCE_H_
20
21#include <stdint.h>
22
23namespace android {
24
25class TimeSource {
26public:
27    TimeSource() {}
28    virtual ~TimeSource() {}
29
30    virtual int64_t getRealTimeUs() = 0;
31
32private:
33    TimeSource(const TimeSource &);
34    TimeSource &operator=(const TimeSource &);
35};
36
37class SystemTimeSource : public TimeSource {
38public:
39    SystemTimeSource();
40
41    virtual int64_t getRealTimeUs();
42
43private:
44    int64_t mStartTimeUs;
45};
46
47}  // namespace android
48
49#endif  // TIME_SOURCE_H_
50