1 //===-- Timer.cpp -----------------------------------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include "Timer.h" 11 #include <assert.h> 12 13 using namespace lldb_perf; 14 15 TimeGauge::TimeType 16 TimeGauge::Now () 17 { 18 return high_resolution_clock::now(); 19 } 20 21 TimeGauge::TimeGauge () : 22 m_start(), 23 m_state(TimeGauge::State::eNeverUsed) 24 { 25 } 26 27 void 28 TimeGauge::Start () 29 { 30 m_state = TimeGauge::State::eCounting; 31 m_start = Now(); 32 } 33 34 double 35 TimeGauge::Stop () 36 { 37 m_stop = Now(); 38 assert(m_state == TimeGauge::State::eCounting && "cannot stop a non-started clock"); 39 m_state = TimeGauge::State::eStopped; 40 m_delta = duration_cast<duration<double>>(m_stop-m_start).count(); 41 return m_delta; 42 } 43 44 double 45 TimeGauge::GetStartValue () const 46 { 47 return (double)m_start.time_since_epoch().count() * (double)system_clock::period::num / (double)system_clock::period::den; 48 } 49 50 double 51 TimeGauge::GetStopValue () const 52 { 53 return (double)m_stop.time_since_epoch().count() * (double)system_clock::period::num / (double)system_clock::period::den; 54 } 55 56 double 57 TimeGauge::GetDeltaValue () const 58 { 59 assert(m_state == TimeGauge::State::eStopped && "clock must be used before you can evaluate it"); 60 return m_delta; 61 } 62
