Re: [ECOS] select() and signal's

[Jonathan Larmour <jlarmour at redhat dot com>]

"Boris V. Guzhov" wrote:
> 
> Hi,
> 
> Are there any way in eCos to interrupt the select() blocking
> through a sending of a any signal?
> 
> For instance:
> 
> // posix thread 1:
> void *thr1(void *par)
> {
>   struct sigaction sa;
>   sigset_t mask;
> 
>   sigemptyset( &mask );
>   sigaddset( &mask, SIGRTMIN );
>   pthread_sigmask( SIG_UNBLOCK, &mask, 0 );
> 
>   sigemptyset( &sa.sa_mask );
>   sa.sa_flags = SA_SIGINFO;
>   sa.sa_sigaction = my_sig_handler;
>   sigaction( SIGTRTMIN, &sa, NULL);
> 
>   fd_set rfds;
>   int retval;
> 
>   FD_ZERO(&rfds);
>   FD_SET(0, &rfds);
>   retval = select(1, &rfds, NULL, NULL, NULL);
>   if ( retval < 0 )
>     perror("select:");
>  ...
> }
> 
> // posix thread 2:
> void *thr2(void *par)
> {
> ...
>   pthread_kill( th1, SIGRTMIN) ;
> ...
> }
> 
> In Linux it works, but in eCos it not works.

It is meant to work in eCos. It's meant to return -1 and set errno to
EINTR. Are you sure thr1 isn't being pre-empted for any other reason, e.g.
if thr2 is higher priority.

Try setting a breakpoint on the function cyg_sigqueue and debugging it.

jifl
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