Very Computer

by **Joel M. Hoffm** » Thu, 10 Jun 1993 06:53:57

Part of a program I'm writing has to see if two events happen less
than 30 seconds apart. What's the best way to do this?

Is there something already in the time library that will let me, e.g.,
say:

first_time = currenttime();
...
second_time = currenttime();
if (time_diff(second_time,first_time) < 30) {
... }

If so, what are the procedure names for currenttime(), etc.? BTW, I'm
running on Linux.

Thanks.

-Joel

--
-----------------------------------------------------------------------------
|_|~~ Germany, 1943. ``A little garden, fragrant and full of roses.
__|~| 16 Million DEAD. The path is narrow, and a little boy walks along it.
A little boy, a sweet boy, like that growing blossom,
cnc Bosnia, 1993. When the blossom comes to bloom,
cnc HOW MANY MORE? The little boy will be no more.''

- Franta Bass,
killed at age 14 by the Nazis
-----------------------------------------------------------------------------

by **Robert Martin-Lege** » Thu, 10 Jun 1993 23:30:49

>Part of a program I'm writing has to see if two events happen less
>than 30 seconds apart. What's the best way to do this?

>Is there something already in the time library that will let me, e.g.,
>say:

> first_time = currenttime();
> ...
> second_time = currenttime();
> if (time_diff(second_time,first_time) < 30) {
> ... }

>If so, what are the procedure names for currenttime(), etc.? BTW, I'm
>running on Linux.

>Thanks.

>-Joel

I think you're looking for the system call time(2) (man 2 time). This tells
you how many seconds that have passed since 1/1-1970. You could do it like
this (much like your own method, just shorter):

first_time = time((time_t*)NULL);
...
if (time((time_t*)NULL) - first_time < 30) {
...
}

-----------------------------------------------------------------------------

Robert Martin-Legene | University of Copenhagen, Denmark
-----------------------------------------------------------------------------

Very Computer

How to see if less than x seconds have passed?

How to see if less than x seconds have passed?

How to see if less than x seconds have passed?