ecb8723402
There's no need to construct a Timing object to call this method. On Windows we were unnecessarily calling CreateWaitableTimer + CloseHandle but never actually using that waitable timer. There's otherwise no change in functionality. R=xians@webrtc.org Review URL: https://webrtc-codereview.appspot.com/20869004 git-svn-id: http://webrtc.googlecode.com/svn/trunk@6624 4adac7df-926f-26a2-2b94-8c16560cd09d
61 lines
1.9 KiB
C++
61 lines
1.9 KiB
C++
/*
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* Copyright 2008 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 WEBRTC_BASE_TIMING_H_
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#define WEBRTC_BASE_TIMING_H_
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#if defined(WEBRTC_WIN)
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#include "webrtc/base/win32.h"
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#endif
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namespace rtc {
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class Timing {
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public:
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Timing();
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virtual ~Timing();
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// WallTimeNow() returns the current wall-clock time in seconds,
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// within 10 milliseconds resolution.
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// WallTimeNow is static and does not require a timer_handle_ on Windows.
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static double WallTimeNow();
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// TimerNow() is like WallTimeNow(), but is monotonically
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// increasing. It returns seconds in resolution of 10 microseconds
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// or better. Although timer and wall-clock time have the same
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// timing unit, they do not necessarily correlate because wall-clock
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// time may be adjusted backwards, hence not monotonic.
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// Made virtual so we can make a fake one.
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virtual double TimerNow();
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// BusyWait() exhausts CPU as long as the time elapsed is less than
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// the specified interval in seconds. Returns the actual waiting
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// time based on TimerNow() measurement.
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double BusyWait(double period);
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// IdleWait() relinquishes control of CPU for specified period in
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// seconds. It uses highest resolution sleep mechanism as possible,
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// but does not otherwise guarantee the accuracy. Returns the
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// actual waiting time based on TimerNow() measurement.
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//
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// This function is not re-entrant for an object. Create a fresh
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// Timing object for each thread.
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double IdleWait(double period);
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private:
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#if defined(WEBRTC_WIN)
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HANDLE timer_handle_;
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#endif
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};
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} // namespace rtc
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#endif // WEBRTC_BASE_TIMING_H_
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