[SDL] framerate counter
slouken at devolution.com
Wed Apr 4 12:27:42 PDT 2001
> This is one reason my code only works on Windows and Linux, but with
> SDL_Delay so coarse I have no choice.
Foo. SDL_Delay is implemented on UNIX using select()
The timer resolution is based on the kernel scheduling resolution, not
anything inherent in the calls being made. usleep() has the same resolution,
and is implemented with select() as well.
>From the nanosleep man page:
The current implementation of nanosleep is based on the
normal kernel timer mechanism, which has a resolution of
1/HZ s (i.e, 10 ms on Linux/i386 and 1 ms on Linux/Alpha).
Therefore, nanosleep pauses always for at least the speci-
fied time, however it can take up to 10 ms longer than
specified until the process becomes runnable again. For
the same reason, the value returned in case of a delivered
signal in *rem is usually rounded to the next larger mul-
tiple of 1/HZ s.
David, you don't need to reply. :)
-Sam Lantinga, Lead Programmer, Loki Entertainment Software
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