CTimer Class Reference

Timer for elapsed time and CPU time. More...

#include <Timer.h>

Public Member Functions
	CTimer ()
	Constructor. More...
const std::string	GetTimeAndDate () const
	Get current time and date. More...
void	Start ()
	Start timing. More...
const std::string	GetElapsedTime () const
	Get elapsed time in seconds. More...
const std::string	GetCPUTime () const
	Get CPU time in seconds. More...

Private Member Functions
const uint64_t	CPUTime () const
	Compute CPU time. More...
const std::string	TimeString (float seconds, size_t n) const
	Time as a string. More...
const std::string	GetTimeAndDate (const systime_point) const
	Get date and time. More...

Private Attributes
systime_point	m_tpElapsedTimeStart
	Clock time.
float	m_fCPUTimeStart
	CPU time in seconds.

Detailed Description

The timer is charged with everything that is time-related, in particular, elapsed time, CPU time, and clock time. The member functions return time intervals measured from the time Start() is called to the current time. The CPU time reported is the total summed over all threads. Uses std::chrono to do the heavy lifting.

Constructor & Destructor Documentation

CTimer()

CTimer::CTimer

(

)

Call Start() in case it isn't called elsewhere.

Member Function Documentation

CPUTime()

const uint64_t CTimer::CPUTime ( ) const

private

Get CPU time for this process in seconds. It's annoying that std::chron has no cross-platform support for this.

Returns

User CPU time in milliseconds.

GetCPUTime()

const std::string CTimer::GetCPUTime

(

)

const

Get the amount of CPU time used since the timer was started.

Returns

CPU time in seconds.

GetElapsedTime()

const std::string CTimer::GetElapsedTime

(

)

const

Get the amount of time elapsed since the timer was started.

Returns

Elapsed time.

GetTimeAndDate() [1/2]

const std::string CTimer::GetTimeAndDate

(

)

const

Get the current date and time as a string. Uses GetDateAndTime() to do the heavy lifting.

Returns

Current date and time string.

GetTimeAndDate() [2/2]

const std::string CTimer::GetTimeAndDate ( const systime_point  p ) const

private

Get time and date string from a systime_point.

Parameters

p	An instance of systime_point.

Returns

The corresponding time and date string.

Start()

void CTimer::Start

(

)

Start timing by saving the current elapsed and CPU times.

TimeString()

const std::string CTimer::TimeString ( float  fSeconds, size_t  n  ) const

private

Format seconds into to a string of days, hours, minutes, and fSeconds, with a fractional number of seconds if required.

Parameters

fSeconds	Initial number of seconds.
n	Number of decimal places in the seconds field of the string.

Returns

String of days, hours, minutes, and seconds.