Is it not recommend to use pthread_wakeup_np form inside an ISR?`(I
currently do
it and I'm not sure if it is a good idea, what makes the difference?).
Which header do I have to include to use pthread_kill ?
Thanks
tobias
[EMAIL PROTECTED] schrieb:
> On Tue, May 09, 2000 at 10:12:43AM -0500, daniel sheltraw wrote:
> > I have setup an ISR that accepts hardware interrupts from another
> > device via the parallel port. The ISR simply increments a counter. I
would
> > like to produce a pause in the task when the counter reaches a
certain value
> > and restart the task at another counter value. This
> > should be done without a busy wait checking the value of the
counter.
>
> Here's on way.
> /* note that if "thread" is running when the SUSPEND is sent, it
> will continue to run until it times out or calls the scheduler */
>
> interrupt_handler:
> count++;
> if(should_stop(count))
> pthread_kill(thread,RTL_SIG_SUSPEND);
> else if(should_restart(count))
> pthread_kill(thread,RTL_SIG_WAKEUP);
>
>
> >
> > Any clarifications on using suspend/resume routines to control the
task
> > within an ISR. Any other suggestions? Semaphores were
> > suggested. Does anyone have a code snippet for a semaphore approach?
> >
> > Thanks everyone,
> > Daniel
> >
> >
> > >From: [EMAIL PROTECTED]
> > >To: [EMAIL PROTECTED]
> > >CC: [EMAIL PROTECTED]
> > >Subject: Re: [rtl] RT interrupt service routine question
> > >Date: Tue, 09 May 2000 16:31:47 +0200 (MET DST)
> > >
> > >
> > > > > pthread_wakeup_np() is safe. The others are unknown (yet).
> > > >
> > > > pthread_suspend_np is safe, but may suspend the interrupt
handler.
> > >
> > >Folks,
> > >
> > >"Safe" just means: it won't crash your machine (immediately).
> > >It not equal to "useful" or "wise". ;-)
> > >
> > >
> > >Gabor
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