Timer.cpp revision 9de4dec874148d30cc1d4c498d38cd048a8164ca 
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#include "CFCMutableDictionary.h"
14#include "CFCString.h"
15
16using namespace lldb_perf;
17
18TimeGauge::TimeType
19TimeGauge::Now ()
20{
21	return high_resolution_clock::now();
22}
23
24TimeGauge::TimeGauge () :
25    m_start(),
26    m_state(TimeGauge::State::eNeverUsed)
27{
28}
29
30void
31TimeGauge::Start ()
32{
33	m_state = TimeGauge::State::eCounting;
34	m_start = Now();
35}
36
37double
38TimeGauge::Stop ()
39{
40	m_stop = Now();
41	assert(m_state == TimeGauge::State::eCounting && "cannot stop a non-started clock");
42	m_state = TimeGauge::State::eStopped;
43    m_delta = duration_cast<duration<double>>(m_stop-m_start).count();
44	return m_delta;
45}
46
47double
48TimeGauge::GetStartValue () const
49{
50    return (double)m_start.time_since_epoch().count() * (double)system_clock::period::num / (double)system_clock::period::den;
51}
52
53double
54TimeGauge::GetStopValue () const
55{
56    return (double)m_stop.time_since_epoch().count() * (double)system_clock::period::num / (double)system_clock::period::den;
57}
58
59double
60TimeGauge::GetDeltaValue () const
61{
62	assert(m_state == TimeGauge::State::eStopped && "clock must be used before you can evaluate it");
63	return m_delta;
64}
65