Re: interruptible_sleep_on quistion

From: Capstar (spam0_at_eg.homeip.net)
Date: 09/15/03 

Date: Mon, 15 Sep 2003 14:20:26 +0200

Capstar wrote:
> Ok, now I have another related problem: I actually didn't use
> interruptible_sleep_on, but interruptible_sleep_on_timeout. I haven't
> found a wait_event_interruptible_timeout macro in sched.h. I did grep
> for wait_event_interruptible_timeout in de kernel source, and found a
> that some device drivers define this macro themselves with
> shedule_timeout in stead of schedule(). This was actually what I wanted
> to do.
>
> in drivers/video/matrox/matroxfb_base.c there's a nice implementation
> (as far as I can see) which only defines this macro when it is not
> allready defined. I guess I'll just copy this piece of code.
>
> I do want to verify if this is good practice? I assume it is since it is
> in the mainstream kernel, but I do like to be sure.
>
> Is there also a possibility that this macro will be defined in sched.h
> or some other header file in the (near) future?
>
> Thanks in advance,
> Mark
>

whoops, there was one other thing I wanted to ask: in matroxfb_base.c
they do:
#ifndef wait_event_interruptible_timeout
#define __wait_event_interruptible_timeout(...)
etc...

but maybe the double underscore version allready exist, they don't check
on it. Or is there some rule in the kernel in which they say, if foo
isn't defined or doesn't exist, then __foo also isn't defined or doesn't
exist?

Mark

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