Gray::cTimePerf Class Reference

#include <cTimeSys.h>

Public Member Functions
	cTimePerf (TIMEPERF_t nTime=0) noexcept
	cTimePerf (int nTime) noexcept
	cTimePerf (bool bTrue) noexcept
bool	isTimeValid () const noexcept
void	InitTimeNow () noexcept
TIMEPERF_t	get_Perf () const noexcept
TIMEPERF_t	GetAgeDiff (cTimePerf tStop) const noexcept
TIMEPERF_t	get_AgePerf () const noexcept
double	get_Seconds () const noexcept
double	get_AgeSeconds () const noexcept
double	get_Days () const noexcept

Static Public Member Functions
static bool __stdcall	InitFreq () noexcept
static double __stdcall	ToSeconds (TIMEPERF_t t) noexcept
static double __stdcall	ToDays (TIMEPERF_t t) noexcept

Public Attributes
TIMEPERF_t	m_nTime
	Arbitrary start time in k_nFreq units. 64 byte unsigned type. More...

Static Public Attributes
static const TIMEPERF_t	sm_nFreq = cTimeSpec::k_FREQ
	nanosecond accurate. for linux using cTimeSpec More...

Detailed Description

Very high rate timer. 64 bit. like the X86 'rdtsc' instruction. TIMEPERF_t = The system very high precision performance timer. Maybe nSec ?

Constructor & Destructor Documentation

cTimePerf() [1/3]

Gray::cTimePerf::cTimePerf ( TIMEPERF_t  nTime = 0 )

inlinenoexcept

default = init to 0.

cTimePerf() [2/3]

Gray::cTimePerf::cTimePerf ( int  nTime )

inlinenoexcept

default = init to 0. Allow constants to not have a convert.

cTimePerf() [3/3]

Gray::cTimePerf::cTimePerf ( bool  bTrue )

inlinenoexcept

Member Function Documentation

get_AgePerf()

TIMEPERF_t Gray::cTimePerf::get_AgePerf ( ) const

inlinenoexcept

how long ago was this ?

get_AgeSeconds()

double Gray::cTimePerf::get_AgeSeconds ( ) const

inlinenoexcept

how long ago was this ? TIMESECF_t

get_Days()

double Gray::cTimePerf::get_Days ( ) const

inlinenoexcept

Convert cTimePerf to double days (from arbitrary start time).

Returns

time in days since some unknown/arbitrary starting point

get_Perf()

TIMEPERF_t Gray::cTimePerf::get_Perf ( ) const

inlinenoexcept

Get the time stamp.

get_Seconds()

double Gray::cTimePerf::get_Seconds ( ) const

inlinenoexcept

convert arbitrary start time to seconds (type = double) TIMESECF_t

GetAgeDiff()

TIMEPERF_t Gray::cTimePerf::GetAgeDiff ( cTimePerf  tStop ) const

inlinenoexcept

how long ago was this ?

InitFreq()

bool GRAYCALL Gray::cTimePerf::InitFreq ( )

staticnoexcept

need to call this once in _WIN32 to capture the k_nFreq

InitTimeNow()

void Gray::cTimePerf::InitTimeNow ( )

noexcept

QueryPerformanceCounter() is better than 'rdtsc' for multi core. available >= Windows 2000

isTimeValid()

bool Gray::cTimePerf::isTimeValid ( ) const

inlinenoexcept

ToDays()

double GRAYCALL Gray::cTimePerf::ToDays ( TIMEPERF_t  t )

staticnoexcept

Convert cTimePerf to double days (from arbitrary start time).

Returns

time in days since some unknown/arbitrary starting point

ToSeconds()

static double __stdcall Gray::cTimePerf::ToSeconds ( TIMEPERF_t  t )

inlinestaticnoexcept

Member Data Documentation

m_nTime

TIMEPERF_t Gray::cTimePerf::m_nTime

Arbitrary start time in k_nFreq units. 64 byte unsigned type.

sm_nFreq

const TIMEPERF_t Gray::cTimePerf::sm_nFreq = cTimeSpec::k_FREQ

static

nanosecond accurate. for linux using cTimeSpec

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The documentation for this class was generated from the following files:

• c:/Dennis/Source/Gray/GrayCore/include/cTimeSys.h
• c:/Dennis/Source/Gray/GrayCore/src/cTimeSys.cpp