blob: 1dee607617e4ce0e7479c26561573e27b291d890 [file] [log] [blame]
* Copyright 2008 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.
#if defined(WEBRTC_WIN)
#include "webrtc/base/win32.h"
namespace rtc {
class Timing {
virtual ~Timing();
// WallTimeNow() returns the current wall-clock time in seconds,
// within 10 milliseconds resolution.
// WallTimeNow is static and does not require a timer_handle_ on Windows.
static double WallTimeNow();
// TimerNow() is like WallTimeNow(), but is monotonically
// increasing. It returns seconds in resolution of 10 microseconds
// or better. Although timer and wall-clock time have the same
// timing unit, they do not necessarily correlate because wall-clock
// time may be adjusted backwards, hence not monotonic.
// Made virtual so we can make a fake one.
virtual double TimerNow();
// BusyWait() exhausts CPU as long as the time elapsed is less than
// the specified interval in seconds. Returns the actual waiting
// time based on TimerNow() measurement.
double BusyWait(double period);
// IdleWait() relinquishes control of CPU for specified period in
// seconds. It uses highest resolution sleep mechanism as possible,
// but does not otherwise guarantee the accuracy. Returns the
// actual waiting time based on TimerNow() measurement.
// This function is not re-entrant for an object. Create a fresh
// Timing object for each thread.
double IdleWait(double period);
#if defined(WEBRTC_WIN)
HANDLE timer_handle_;
} // namespace rtc