Re: clock_delay_for_interval
Re: clock_delay_for_interval
- Subject: Re: clock_delay_for_interval
- From: Eric Long <email@hidden>
- Date: Thu, 19 Jun 2003 08:37:50 -0700
>
For some reason, the actual implementation of this routine (on PowerPC
>
- it doesn't exist on Darwin/x86) is called "delay_for_interval()"
>
(without the "clock" prefix). I'm not sure whether this was
>
intentional for some reason, or just an error. But I think that
>
exposing this routine in the header at all was a mistake. There are
>
other, more supported ways, of doing this that a preferable.
Ok. I noticed after I'd written my last post that the
clock_delay_for_interval() prototype was within a #ifdef __APPLE_API_PRIVATE
section. I was kind of misled into thinking it was open for use by this
url:
<
http://developer.apple.com/techpubs/macosx/Darwin/General/KernelProgramming
/services/chapter_16_section_4.html>.
>
What kind of KEXT is this? If it's an IOKit KEXT, you should be using
>
IODelay(). If it is a non-IOKit KEXT, you are probably already
>
knee-deep in "no-compatibility-guarantees" code. But the routine
>
delay() is much more likely to be supported long term than the
>
implementation routine you found and tried.
This is just an internal non-IOKit tool. I didn't see a prototype for
delay() in the Kernel framework. I see #define DELAY(n) delay(n) in
<ppc/param.h> but not the actual prototype for delay(). This works the same
as the toolbox Delay() function? Where is the prototype declared?
Thanks,
Eric
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