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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 RTC_BASE_FAKE_CLOCK_H_
#define RTC_BASE_FAKE_CLOCK_H_
#include <stdint.h>
#include "api/units/time_delta.h"
#include "api/units/timestamp.h"
#include "rtc_base/synchronization/mutex.h"
#include "rtc_base/thread_annotations.h"
#include "rtc_base/time_utils.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() = default;
FakeClock(const FakeClock&) = delete;
FakeClock& operator=(const FakeClock&) = delete;
~FakeClock() override = default;
// 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 SetTime(webrtc::Timestamp new_time);
void AdvanceTime(webrtc::TimeDelta delta);
private:
mutable webrtc::Mutex lock_;
int64_t time_ns_ RTC_GUARDED_BY(lock_) = 0;
};
class ThreadProcessingFakeClock : public ClockInterface {
public:
int64_t TimeNanos() const override { return clock_.TimeNanos(); }
void SetTime(webrtc::Timestamp time);
void AdvanceTime(webrtc::TimeDelta delta);
private:
FakeClock clock_;
};
// Helper class that sets itself as the global clock in its constructor and
// unsets it in its destructor.
class ScopedBaseFakeClock : public FakeClock {
public:
ScopedBaseFakeClock();
~ScopedBaseFakeClock() override;
private:
ClockInterface* prev_clock_;
};
// TODO(srte): Rename this to reflect that it also does thread processing.
class ScopedFakeClock : public ThreadProcessingFakeClock {
public:
ScopedFakeClock();
~ScopedFakeClock() override;
private:
ClockInterface* prev_clock_;
};
} // namespace rtc
#endif // RTC_BASE_FAKE_CLOCK_H_
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