| //===-- 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; |
| } |