[EMAIL PROTECTED] wrote:
>
> On Wed, Jul 05, 2000 at 04:43:34PM +0200, Ivan Martinez wrote:
> > [EMAIL PROTECTED] wrote:
> > >
> > > On Tue, Jul 04, 2000 at 07:11:29PM +0200, Ivan Martinez wrote:
> > > > Hello all
> > > > I have a real time task which consists of an infinite loop with some
> > > > code and a "pthread_wait_np" inside it. If it's running and I call
> > > > "pthread_suspend_np", does the task stop inmediatly or when it executes
> > > > "pthread_wait_np" again?.
> > > > Can't anybody help me with my other problem about spin locks?.
> > > > Thank you.
> > >
> > > On a uniprocessor that target of a suspend willl not run again until
> > > it is woken up.
> > > On a multiprocessor, it is possible that the thread is running during the
> > > suspend and then it will only get suspended when the remote scheduler
> > > runs.
> >
> > Mmmm... It seems I didn't explain myself very well, sorry. The real time
> > task is something like:
> >
> > while (1) do
> > {
> > sentence1();
> > sentence2();
> > sentence3();
> > pthread_wait_np();
> > }
> >
> > Imagine that the execution is in "sentence1" and other task suspends
> > this one with "pthread_suspend_np". Will this task stop right there or
> > it will execute "sentence1", "sentence2", "sentence3" and stop in
> > "pthread_wait_np"?. Many thanks.
>
> On a uniprocessor the task will not resume.
> That is
> Task 1
> s1
> s2
> -----------<preempted or interrupted>
> Task 2 calls
> pthread_suspend_np(thread1)
>
> Thread 1 will not continue until someone does pthread_wakeup_np
> or sends it another signal.
I know, waking up is not my question. My question is if
"pthread_suspend_np" will ALWAYS stop the real time task after
"sentence3", in "pthread_wait_np". "sentenceX" operates on some data and
if the task can be stopped between "sentence2" and "sentence3", for
example, it will produce inconsistency and problems. Many thanks.
>
> >
> > >
> > > What was your spinlock problem?
> >
> > Paolo put me in the right direction, thank you.
> >
> > >
> > > > --
> > > > Ivan Martinez (Rodriguez)
> > > > BEng in Software Engineering - MEng student
> > > > http://www.student.dtu.dk/~u990873
> > > > "Got fabes?"
> > > > -- [rtl] ---
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> > > > ---
> > > > For more information on Real-Time Linux see:
> > > > http://www.rtlinux.org/rtlinux/
> > >
> > > --
> > > ---------------------------------------------------------
> > > Victor Yodaiken
> > > FSMLabs: www.fsmlabs.com www.rtlinux.com
> > > FSMLabs is a servicemark and a service of
> > > VJY Associates L.L.C, New Mexico.
> >
> > --
> > Ivan Martinez (Rodriguez)
> > BEng in Software Engineering - MEng student
> > http://www.student.dtu.dk/~u990873
> > "Got fabes?"
>
> --
> ---------------------------------------------------------
> Victor Yodaiken
> FSMLabs: www.fsmlabs.com www.rtlinux.com
> FSMLabs is a servicemark and a service of
> VJY Associates L.L.C, New Mexico.
--
Ivan Martinez (Rodriguez)
BEng in Software Engineering - MEng student
http://www.student.dtu.dk/~u990873
"Got fabes?"
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For more information on Real-Time Linux see:
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