On Mon, 19 May 2008 10:11:26 +0200, Matthieu
<[EMAIL PROTECTED]> wrote:
> Hi
>
> I'm using vxwork's API.
> Is SIGXCPU signal sent when primary to seconday VxWorks task's mode
switch
> ? If it's the case, which implementation would work ?
>
> Use of signal (native Xenomai API) :
>
> void vx_task_create(...)
> {
> ...
> signal(SIGXCPU, xe_signal_thread);
> ...
> }
>
> void *xe_signal_thread (void *sig_caught)
> {
> /* Mode switching warning */
> }
>
> There is missing rt_task_set_mode(0, T_WARNSW, NULL); which I don't
> know where I have to put it because I want all the task to warn in case
of
> a mode switch and I don't what to write this sentense in each task's body
> routine.
>
>
>
> Use of pthread_sigmask
>
> static sigset_t sigusr1Mask;
>
> void vx_task_create(...)
> {
> ...
> sigemptyset(&sigusr1Mask);
> sigaddset(&sigusr1Mask,SIGXCPU);
> ...
> }
>
> void vx_task_start(...) {
> ...
> pthread_sigmask (SIG_BLOCK, &sigusr1Mask, NULL);
> pthread_create (&sig_thr_id, NULL, xe_signal_thread, NULL);
> ...
> }
>
> void *xe_signal_thread (void *arg)
> {
> int sig_caught; /* signal caught */
> sigwait (&signal_mask, &sig_caught);
> switch (sig_caught)
> {
> case SIGXCPU: /* process SIGXCPU */
> /* Mode switching warning */
> fprintf (stderr, "\nPrimary to secondary mode switch %d\n",
> sig_caught);
> break;
> default: /* should normally not happen */
> fprintf (stderr, "\nUnexpected signal %d\n", sig_caught);
> break;
> }
> }
>
> In this case, a thread waiting for the signal will be created with
> each task, I don't thing it's necessary !!
>
> On last thing, how can I force a vxworks task switching in primary mode,
> like in the native API rt_task_set_mode(0, T_PRIMARY, NULL);
>
> Thank's in advance
>
> Matthieu
>
>
I found out that it is possible to mix API since SIGXCPU signal, sent when
swiching in secondary mode, is obviously only used by Xenomai Native API.
Well, I tried to implement it in a vxworks context, but I don't have test
it yet. I have some problems remaining with rt_task_set_mode(0, T_WARNSW,
NULL) that I don't know where to use.
Do you have any solution ?
Matthieu
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