62 lines
1.6 KiB
C
62 lines
1.6 KiB
C
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#ifndef CRYPTOPP_HRTIMER_H
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#define CRYPTOPP_HRTIMER_H
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#include "config.h"
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#ifndef HIGHRES_TIMER_AVAILABLE
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#include <time.h>
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#endif
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NAMESPACE_BEGIN(CryptoPP)
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#ifdef HIGHRES_TIMER_AVAILABLE
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typedef word64 TimerWord;
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#else
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typedef clock_t TimerWord;
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#endif
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//! _
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class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE TimerBase
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{
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public:
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enum Unit {SECONDS = 0, MILLISECONDS, MICROSECONDS, NANOSECONDS};
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TimerBase(Unit unit, bool stuckAtZero) : m_timerUnit(unit), m_stuckAtZero(stuckAtZero), m_started(false) {}
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virtual TimerWord GetCurrentTimerValue() =0; // GetCurrentTime is a macro in MSVC 6.0
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virtual TimerWord TicksPerSecond() =0; // this is not the resolution, just a conversion factor into seconds
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void StartTimer();
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double ElapsedTimeAsDouble();
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unsigned long ElapsedTime();
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private:
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double ConvertTo(TimerWord t, Unit unit);
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Unit m_timerUnit; // HPUX workaround: m_unit is a system macro on HPUX
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bool m_stuckAtZero, m_started;
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TimerWord m_start, m_last;
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};
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//! measure CPU time spent executing instructions of this thread (if supported by OS)
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/*! /note This only works correctly on Windows NT or later. On Unix it reports process time, and others wall clock time.
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*/
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class ThreadUserTimer : public TimerBase
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{
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public:
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ThreadUserTimer(Unit unit = TimerBase::SECONDS, bool stuckAtZero = false) : TimerBase(unit, stuckAtZero) {}
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TimerWord GetCurrentTimerValue();
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TimerWord TicksPerSecond();
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};
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//! high resolution timer
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class CRYPTOPP_DLL Timer : public TimerBase
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{
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public:
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Timer(Unit unit = TimerBase::SECONDS, bool stuckAtZero = false) : TimerBase(unit, stuckAtZero) {}
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TimerWord GetCurrentTimerValue();
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TimerWord TicksPerSecond();
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};
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NAMESPACE_END
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#endif
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