which sleep function

[John]

Newbie here - using LynxOS 4.0 - Device Driver development

Currently I'm using the usec_sleep() function. However, this is a busy
loop. I would like to use one that suspends my process until the
amount of time (in milliseconds) has elapsed. Is there another sleep
function that I can use?

[Cyril Novikov]

tswait() with a dummy semaphore initialized to zero. The timeout is specified in
clock ticks. For millisecond resolution, you'll have to set the clock tick rate
to 1000Hz.

[John]

Thanks for the replay....but Newbie here.

How do I change the clock tick rate to 1000 Hz?

[Cyril Novikov]

I'm not sure, it's been about 5 years since I last worked with 4.0. I think,
maybe change the TICKSPERSEC constant in /usr/include/conf.h to 1000 and rebuild
the kernel? (make sure conf.o is rebuilt)

--
Cyril

[John]

On Wed, 09 Jul 2008 14:23:48 -0700, Cyril Novikov
<cnov...@mail.remove.this.ru> wrote:

Is there another way, I'm doing a device driver and I need the driver
to sleep awhile instead of doing a busy wait. Changing the TICKSPERSEC
is not an option.

[Cyril Novikov]

Another way is to wait with the default resolution (10ms).