El Sat, Sep 15, 2007 at 01:40:00AM +0300 Heikki Orsila ha dit:
> Consider a simple embedded system:
>
> void interrupt_handler(void)
> {
> ...
> }
>
> int main(void)
> {
> ...
> }
>
> I would like to "emulate" this system with a workstation to make
> development faster. I would create two threads, one executing the
> main() function, and the other occasionally calling interrupt_handler().
> Before interrupt_handler() is called, the main() thread should be
> stopped asynchronously.
>
> I looked into pthreads documentation and found only pthread_kill(thread,
> SIGTSTP) to do asynchronous stop, but then I also have to play terminal
> tricks to avoid problems..
>
> Is there are function to just disable scheduling of a single thread
> without having other side-effects (such as terminal stuff)? Functions
> like pthread_disable_scheduling(thread) and
> pthread_enable_scheduling(thread) would be good for this..
i wonder if assigning a real time priority with
pthread_setschedparam() to the caller of your interrupt_handler()
function would solve your problem. this way the main() thread is never
scheduled when the interrupt_handler() thread is
runnable. interrupt_handler() should be as short as possible,
otherwise you risk starving of the rest of your systems processes.
--
Matthias Kaehlcke
Linux Application Developer
Barcelona
Representation of the world, like the world itself, is
the work of men; they describe it from their own point
of view, which they confuse with the absolute truth
(Simone de Beauvoir)
.''`.
using free software / Debian GNU/Linux | http://debian.org : :' :
`. `'`
gpg --keyserver pgp.mit.edu --recv-keys 47D8E5D4 `-
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