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/*
* Copyright 2016 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef WEBRTC_BASE_FAKECLOCK_H_
#define WEBRTC_BASE_FAKECLOCK_H_
#include "webrtc/base/criticalsection.h"
#include "webrtc/base/timedelta.h"
#include "webrtc/base/timeutils.h"
namespace rtc {
// Fake clock for use with unit tests, which does not tick on its own.
// Starts at time 0.
//
// TODO(deadbeef): Unify with webrtc::SimulatedClock.
class FakeClock : public ClockInterface {
public:
~FakeClock() override {}
// ClockInterface implementation.
int64_t TimeNanos() const override;
// Methods that can be used by the test to control the time.
// Should only be used to set a time in the future.
void SetTimeNanos(int64_t nanos);
void SetTimeMicros(int64_t micros) {
SetTimeNanos(kNumNanosecsPerMicrosec * micros);
}
void AdvanceTime(TimeDelta delta);
void AdvanceTimeMicros(int64_t micros) {
AdvanceTime(rtc::TimeDelta::FromMicroseconds(micros));
}
private:
CriticalSection lock_;
int64_t time_ GUARDED_BY(lock_) = 0;
};
// Helper class that sets itself as the global clock in its constructor and
// unsets it in its destructor.
class ScopedFakeClock : public FakeClock {
public:
ScopedFakeClock();
~ScopedFakeClock() override;
private:
ClockInterface* prev_clock_;
};
} // namespace rtc
#endif // WEBRTC_BASE_FAKECLOCK_H_
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