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//===-- Timer.cpp -----------------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "Timer.h"
#include <assert.h>
using namespace lldb_perf;
TimeGauge::TimeType
TimeGauge::Now ()
{
return high_resolution_clock::now();
}
TimeGauge::TimeGauge () :
m_start(),
m_state(TimeGauge::State::eNeverUsed)
{
}
void
TimeGauge::Start ()
{
m_state = TimeGauge::State::eCounting;
m_start = Now();
}
double
TimeGauge::Stop ()
{
m_stop = Now();
assert(m_state == TimeGauge::State::eCounting && "cannot stop a non-started clock");
m_state = TimeGauge::State::eStopped;
m_delta = duration_cast<duration<double>>(m_stop-m_start).count();
return m_delta;
}
double
TimeGauge::GetStartValue () const
{
return (double)m_start.time_since_epoch().count() * (double)system_clock::period::num / (double)system_clock::period::den;
}
double
TimeGauge::GetStopValue () const
{
return (double)m_stop.time_since_epoch().count() * (double)system_clock::period::num / (double)system_clock::period::den;
}
double
TimeGauge::GetDeltaValue () const
{
assert(m_state == TimeGauge::State::eStopped && "clock must be used before you can evaluate it");
return m_delta;
}
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