itpp::CPU_Timer Class Reference
[Timers]

A CPU time timer class

Measures the time spent by the CPU on the current process. If two processes are running concurrently, one real seconds equal 5 CPU seconds per process. The resolution is not very good (in the order of 0.01 seconds). More...

#include <timing.h>

List of all members.

Public Member Functions
	CPU_Timer ()
	Create a new timer. Sets the time to zero.
void	start (void)
	Start the timer. This does not set the time to zero.
double	stop (void)
	Stop the timer. Returns the elapsed time in seconds.
void	reset (double t=0.0)
	Sets the time to time t, which is zero by default. Stops the timer if it is running.
void	tic (void)
	Resets the timer and starts it.
double	toc (void)
	Returns the elapsed time since last tic().
void	toc_print (void)
	Prints the elapsed time since last tic().
double	get_time () const
	Returns the elapsed time.
Protected Member Functions
double	get_current_time () const
	Vitrual function that returns teh current time.
Protected Attributes
double	start_time
	The start time of the timer.
double	stop_time
	The stop time of the timer.
double	elapsed_time
	The ellapsed time from start to stop.
bool	running
	A bool that indicates if the timer is running or not.

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Detailed Description

A CPU time timer class

Measures the time spent by the CPU on the current process. If two processes are running concurrently, one real seconds equal 5 CPU seconds per process. The resolution is not very good (in the order of 0.01 seconds).

Usage: Define a time object:

  CPU_Timer timer;

Actions: Reset:

 timer.reset(); 

Start:

 timer.start(); 

Stop:

 timer.stop(); 

Get time:

 elapsedtime = timer.get_time(); 

It is possible to get elapsed time without stopping the timer. Observe that it is also possible to use the macros "time.tic();" to reset and start clock and "time.toc();" stop and print the elapsed time.

Warning:

May give an negative answer if the measured time is too long.

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

• timing.h
• timing.cpp