| //===-- Timer.cpp -----------------------------------------------*- C++ -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #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; |
| } |