PerformanceCounter Class Reference

Public Types
typedef timespec	Count
typedef long long	Span

Static Public Member Functions
static void	setToUndefinedValue (Count *value)
static bool	isUndefinedValue (const Count &value)
static Count	current ()
ONIXS_ICEBOE_FORCEINLINE static ONIXS_ICEBOE_HOTPATH void	current (PerformanceCounter::Count *result) noexcept
static Span	nsSpan (const PerformanceCounter::Count &stop, const PerformanceCounter::Count &start)
static Span	usSpan (const PerformanceCounter::Count &stop, const PerformanceCounter::Count &start)
static Span	elapsedNanoseconds (const PerformanceCounter::Count &start)
static Span	elapsedMicroseconds (const PerformanceCounter::Count &start)

Detailed Description

Definition at line 30 of file PerformanceCounter.h.

Member Typedef Documentation

Count

typedef timespec Count

Definition at line 36 of file PerformanceCounter.h.

Span

typedef long long Span

Definition at line 56 of file PerformanceCounter.h.

Member Function Documentation

current() [1/2]

PerformanceCounter::Count current ( )

inlinestatic

Retrieves the current value of the high-resolution performance counter.

Definition at line 143 of file PerformanceCounter.h.

{
    Count result;
    current(&result);
    return result;
}

current() [2/2]

ONIXS_ICEBOE_FORCEINLINE static ONIXS_ICEBOE_HOTPATH void current ( PerformanceCounter::Count * result )

inlinestaticnoexcept

Definition at line 47 of file PerformanceCounter.h.

    {
#ifdef _WIN32
        ::QueryPerformanceCounter(result);
#else
        ::clock_gettime(CLOCK_MONOTONIC, result);
#endif
    }

elapsedMicroseconds()

PerformanceCounter::Span elapsedMicroseconds ( const PerformanceCounter::Count & start )

inlinestatic

Definition at line 118 of file PerformanceCounter.h.

{
    return PerformanceCounter::usSpan(PerformanceCounter::current(), start);
}

elapsedNanoseconds()

PerformanceCounter::Span elapsedNanoseconds ( const PerformanceCounter::Count & start )

inlinestatic

Definition at line 112 of file PerformanceCounter.h.

{
    return PerformanceCounter::nsSpan(PerformanceCounter::current(), start);
}

isUndefinedValue()

bool isUndefinedValue ( const Count & value )

inlinestatic

Definition at line 134 of file PerformanceCounter.h.

{
#ifdef _WIN32
    return (0 == value.LowPart && 0 == value.HighPart);
#else
    return (0 == value.tv_sec && 0 == value.tv_nsec);
#endif
}

nsSpan()

PerformanceCounter::Span nsSpan ( const PerformanceCounter::Count & stop, const PerformanceCounter::Count & start )

inlinestatic

Definition at line 90 of file PerformanceCounter.h.

{
#ifdef _WIN32
    return static_cast<PerformanceCounter::Span>((stop.QuadPart - start.QuadPart) * 1000000000.0 / frequency_.QuadPart);
#else
    return static_cast<PerformanceCounter::Span>((stop.tv_sec - start.tv_sec) * 1000000000 + (stop.tv_nsec - start.tv_nsec));
#endif
}

setToUndefinedValue()

void setToUndefinedValue ( Count * value )

inlinestatic

Definition at line 123 of file PerformanceCounter.h.

{
#ifdef _WIN32
    value->LowPart = 0;
    value->HighPart = 0;
#else
    value->tv_sec = 0;
    value->tv_nsec = 0;
#endif
}

usSpan()

PerformanceCounter::Span usSpan ( const PerformanceCounter::Count & stop, const PerformanceCounter::Count & start )

inlinestatic

Definition at line 101 of file PerformanceCounter.h.

{
#ifdef _WIN32
    return static_cast<PerformanceCounter::Span>((stop.QuadPart - start.QuadPart) * 1000000.0 / frequency_.QuadPart);
#else
    return static_cast<PerformanceCounter::Span>((stop.tv_sec - start.tv_sec) * 1000000 + (stop.tv_nsec - start.tv_nsec) / 1000);
#endif
}