system_wrappers: rename interface -> include

webrtc/system_wrappers/interface/clock.h

-/*
- *  Copyright (c) 2013 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_SYSTEM_WRAPPERS_INTERFACE_CLOCK_H_
-#define WEBRTC_SYSTEM_WRAPPERS_INTERFACE_CLOCK_H_
-
-#include "webrtc/base/scoped_ptr.h"
-#include "webrtc/system_wrappers/interface/rw_lock_wrapper.h"
-#include "webrtc/typedefs.h"
-
-namespace webrtc {
-
-// January 1970, in NTP seconds.
-const uint32_t kNtpJan1970 = 2208988800UL;
-
-// Magic NTP fractional unit.
-const double kMagicNtpFractionalUnit = 4.294967296E+9;
-
-// A clock interface that allows reading of absolute and relative timestamps.
-class Clock {
- public:
-  virtual ~Clock() {}
-
-  // Return a timestamp in milliseconds relative to some arbitrary source; the
-  // source is fixed for this clock.
-  virtual int64_t TimeInMilliseconds() const = 0;
-
-  // Return a timestamp in microseconds relative to some arbitrary source; the
-  // source is fixed for this clock.
-  virtual int64_t TimeInMicroseconds() const = 0;
-
-  // Retrieve an NTP absolute timestamp in seconds and fractions of a second.
-  virtual void CurrentNtp(uint32_t& seconds, uint32_t& fractions) const = 0;
-
-  // Retrieve an NTP absolute timestamp in milliseconds.
-  virtual int64_t CurrentNtpInMilliseconds() const = 0;
-
-  // Converts an NTP timestamp to a millisecond timestamp.
-  static int64_t NtpToMs(uint32_t seconds, uint32_t fractions);
-
-  // Returns an instance of the real-time system clock implementation.
-  static Clock* GetRealTimeClock();
-};
-
-class SimulatedClock : public Clock {
- public:
-  explicit SimulatedClock(int64_t initial_time_us);
-
-  ~SimulatedClock() override;
-
-  // Return a timestamp in milliseconds relative to some arbitrary source; the
-  // source is fixed for this clock.
-  int64_t TimeInMilliseconds() const override;
-
-  // Return a timestamp in microseconds relative to some arbitrary source; the
-  // source is fixed for this clock.
-  int64_t TimeInMicroseconds() const override;
-
-  // Retrieve an NTP absolute timestamp in milliseconds.
-  void CurrentNtp(uint32_t& seconds, uint32_t& fractions) const override;
-
-  // Converts an NTP timestamp to a millisecond timestamp.
-  int64_t CurrentNtpInMilliseconds() const override;
-
-  // Advance the simulated clock with a given number of milliseconds or
-  // microseconds.
-  void AdvanceTimeMilliseconds(int64_t milliseconds);
-  void AdvanceTimeMicroseconds(int64_t microseconds);
-
- private:
-  int64_t time_us_;
-  rtc::scoped_ptr<RWLockWrapper> lock_;
-};
-
-};  // namespace webrtc
-
-#endif  // WEBRTC_SYSTEM_WRAPPERS_INTERFACE_CLOCK_H_