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HighResolutionClock.cpp
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48 lines (37 loc) · 1.71 KB
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// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT license.
#include "ClearScriptV8Native.h"
//-----------------------------------------------------------------------------
// HighResolutionClock implementation
//-----------------------------------------------------------------------------
double HighResolutionClock::SleepMilliseconds(double delay, bool precise)
{
auto start = std::chrono::high_resolution_clock::now();
auto end = start + std::chrono::duration<double, std::milli>(delay);
std::chrono::high_resolution_clock::time_point final;
if (!precise)
{
std::this_thread::sleep_for(std::chrono::duration<double, std::milli>(delay));
final = std::chrono::high_resolution_clock::now();
}
else
{
while ((final = std::chrono::high_resolution_clock::now()) < end) std::this_thread::yield();
}
return std::chrono::duration<double, std::milli>(final - end).count();
}
//-----------------------------------------------------------------------------
double HighResolutionClock::GetMillisecondsSinceUnixEpoch()
{
return std::chrono::duration<double, std::milli>(std::chrono::system_clock::now().time_since_epoch()).count();
}
//-----------------------------------------------------------------------------
double HighResolutionClock::GetRelativeMilliseconds()
{
return std::chrono::duration<double, std::milli>(std::chrono::high_resolution_clock::now().time_since_epoch()).count();
}
//-----------------------------------------------------------------------------
double HighResolutionClock::GetRelativeSeconds()
{
return std::chrono::duration<double>(std::chrono::high_resolution_clock::now().time_since_epoch()).count();
}