hrtimer.h
1.64 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
#ifndef CRYPTOPP_HRTIMER_H
#define CRYPTOPP_HRTIMER_H
#include "config.h"
#ifndef HIGHRES_TIMER_AVAILABLE
#include <time.h>
#endif
NAMESPACE_BEGIN(CryptoPP)
#ifdef HIGHRES_TIMER_AVAILABLE
typedef word64 TimerWord;
#else
typedef clock_t TimerWord;
#endif
//! _
class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE TimerBase
{
public:
enum Unit {SECONDS = 0, MILLISECONDS, MICROSECONDS, NANOSECONDS};
TimerBase(Unit unit, bool stuckAtZero) : m_timerUnit(unit), m_stuckAtZero(stuckAtZero), m_started(false) {}
virtual TimerWord GetCurrentTimerValue() =0; // GetCurrentTime is a macro in MSVC 6.0
virtual TimerWord TicksPerSecond() =0; // this is not the resolution, just a conversion factor into seconds
void StartTimer();
double ElapsedTimeAsDouble();
unsigned long ElapsedTime();
private:
double ConvertTo(TimerWord t, Unit unit);
Unit m_timerUnit; // HPUX workaround: m_unit is a system macro on HPUX
bool m_stuckAtZero, m_started;
TimerWord m_start, m_last;
};
//! measure CPU time spent executing instructions of this thread (if supported by OS)
/*! /note This only works correctly on Windows NT or later. On Unix it reports process time, and others wall clock time.
*/
class ThreadUserTimer : public TimerBase
{
public:
ThreadUserTimer(Unit unit = TimerBase::SECONDS, bool stuckAtZero = false) : TimerBase(unit, stuckAtZero) {}
TimerWord GetCurrentTimerValue();
TimerWord TicksPerSecond();
};
//! high resolution timer
class CRYPTOPP_DLL Timer : public TimerBase
{
public:
Timer(Unit unit = TimerBase::SECONDS, bool stuckAtZero = false) : TimerBase(unit, stuckAtZero) {}
TimerWord GetCurrentTimerValue();
TimerWord TicksPerSecond();
};
NAMESPACE_END
#endif