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65 lines
2.0 KiB
65 lines
2.0 KiB
#ifndef CRYPTOPP_HRTIMER_H |
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#define CRYPTOPP_HRTIMER_H |
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#include "config.h" |
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#if !defined(HIGHRES_TIMER_AVAILABLE) || (defined(CRYPTOPP_WIN32_AVAILABLE) && !defined(THREAD_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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/// \brief Base class for timers |
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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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/// \brief Measure CPU time spent executing instructions of this thread (if supported by OS) |
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/// \note ThreadUserTimer only works correctly on Windows NT or later desktops and servers. |
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/// On Unix-based it reports process time. On Windows Phone and Windows Store it reports wall |
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/// clock time with performance counter precision. On all others it reports wall clock time. |
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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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