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#ifndef CRYPTOPP_HRTIMER_H
#define CRYPTOPP_HRTIMER_H
#include "config.h"
NAMESPACE_BEGIN(CryptoPP)
//! _
class TimerBase
{
public:
enum Unit {SECONDS = 0, MILLISECONDS, MICROSECONDS, NANOSECONDS};
TimerBase(Unit unit, bool stuckAtZero) : m_timerUnit(unit), m_stuckAtZero(stuckAtZero), m_started(false) {}
virtual word64 GetCurrentTimerValue() =0; // GetCurrentTime is a macro in MSVC 6.0
virtual word64 TicksPerSecond() =0; // this is not the resolution, just a conversion factor into seconds
void StartTimer();
double ElapsedTimeAsDouble();
unsigned long ElapsedTime();
private:
double ConvertTo(word64 t, Unit unit);
Unit m_timerUnit; // HPUX workaround: m_unit is a system macro on HPUX
bool m_stuckAtZero, m_started;
word64 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) {}
word64 GetCurrentTimerValue();
word64 TicksPerSecond();
};
#ifdef HIGHRES_TIMER_AVAILABLE
//! high resolution timer
class Timer : public TimerBase
{
public:
Timer(Unit unit = TimerBase::SECONDS, bool stuckAtZero = false) : TimerBase(unit, stuckAtZero) {}
word64 GetCurrentTimerValue();
word64 TicksPerSecond();
};
#endif
NAMESPACE_END
#endif
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