ecs_timer.c File Reference

#include "ecs_def.h"
#include <time.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <unistd.h>
#include "ecs_timer.h"

Functions
double	ecs_timer_wtime (void)
	Return Wall clock time. More...
double	ecs_timer_cpu_time (void)
	Return CPU time. More...
void	ecs_timer_cpu_times (double *user_time, double *system_time)
	Return separate user and system CPU times. More...

Function Documentation

ecs_timer_cpu_time()

double ecs_timer_cpu_time

(

void

)

Return CPU time.

Note that in the rare case that only the minimal C library clock() method is available (see ecs_timer_cpu_time_method()), at least one of the ecs_timer_...() functions (possibly this one) must be called upon program start for this function to be used. In addition, in this case, time may "loop" back to 0 every multiple of 2^size_t / CLOCKS_PER_SEC seconds.

Returns

current CPU time usage, or -1 if unable to compute.

ecs_timer_cpu_times()

void ecs_timer_cpu_times	(	double *	user_time,
		double *	system_time
	)

Return separate user and system CPU times.

Note that in the rare case that only the minimal C library clock() method is available, this function will return -1 values.

Parameters

[out]	user_time	current user CPU usage.
[out]	system_time	current system CPU usage.

ecs_timer_wtime()

double ecs_timer_wtime

(

void

)

Return Wall clock time.

Returns

elapsed time from first call of a function of the ecs_timer_...() series, or -1 if unable to compute.