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Calls to the time functions in Clock can have side effects in some circumstances. It's also questionable if it's a good idea to allow repeated calls to a const method return different values without any changed to the class instance. Bug: webrtc:10270 Change-Id: I316f9788adac954c52b0f9230881b872c54a7ac9 Reviewed-on: https://webrtc-review.googlesource.com/c/120348 Commit-Queue: Sebastian Jansson <srte@webrtc.org> Reviewed-by: Karl Wiberg <kwiberg@webrtc.org> Reviewed-by: Niels Moller <nisse@webrtc.org> Cr-Commit-Position: refs/heads/master@{#26482}
48 lines
1.5 KiB
C++
48 lines
1.5 KiB
C++
/*
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* Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef TEST_DRIFTING_CLOCK_H_
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#define TEST_DRIFTING_CLOCK_H_
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#include <stdint.h>
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#include "system_wrappers/include/clock.h"
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#include "system_wrappers/include/ntp_time.h"
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namespace webrtc {
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namespace test {
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class DriftingClock : public Clock {
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public:
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// TODO(danilchap): Make this constants constexpr when it would be supported.
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static const float kDoubleSpeed; // 2.0f;
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static const float kNoDrift; // 1.0f;
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static const float kHalfSpeed; // 0.5f;
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DriftingClock(Clock* clock, float speed);
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// TODO(danilchap): Make this functions constexpr when it would be supported.
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static float PercentsFaster(float percent) { return 1.0f + percent / 100.0f; }
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static float PercentsSlower(float percent) { return 1.0f - percent / 100.0f; }
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int64_t TimeInMilliseconds() override;
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int64_t TimeInMicroseconds() override;
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NtpTime CurrentNtpTime() override;
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int64_t CurrentNtpInMilliseconds() override;
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private:
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float Drift() const;
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Clock* const clock_;
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const float drift_;
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const int64_t start_time_;
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};
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} // namespace test
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} // namespace webrtc
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#endif // TEST_DRIFTING_CLOCK_H_
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