Re: [ECOS] pthread_kill and signal lost or pending?

[Nick Garnett <nickg@ecoscentric.com>]

"Zhichao Hong" <zhichao.hong@gmail.com> writes:

> Nick,
> 
> Thank you for you quick response!  Is the sigaction and sigqueue in
> eCos process wise or thread wise?  If sigqueue is called, is it for
> the whole process which is always 0 in eCos get the signal?

sigqueue() only delivers to the whole process. So you have to select
which thread gets the signal by manipulating the signal masks. Signal
handlers are global, as POSIX requires. Assuming anything about which
thread a signal handler is run in is not good practice. If you want to
restrict signal delivery to a particular thread, it is often more
sensible to use sigwait().

eCos only allows a pid value of 0 for any of the signal functions
since there is notionally only a single process.

-- 
Nick Garnett                                      eCos Kernel Architect
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