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63 lines
1.7 KiB
63 lines
1.7 KiB
#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) |
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: m_timerUnit(unit), m_stuckAtZero(stuckAtZero), m_started(false) |
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, m_start(0), m_last(0) {} |
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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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