signal usage in Pthread

[Dan Nelson]

In the last episode (May 09), misha said:
> I am trying to port a multithreaded  application from Linux to
> FreeBSD; the application uses SIGUNUSED signal (because Linux threads
> utilize SIGUSR1 and 2 for themselves). I am considering replacing
> SIGUNUSED with SIGUSR1 but am concerned if FreeBSD threads aren't
> using them also.
> 
> Does anyone know if either user-level threads ( gcc -Pthread) or
> kernel threads (gcc -kthread) use SIGUSR1 in a way that would
> preclude using it in the application?

libc_r (-pthread) uses SIGPROF for its scheduling signal, so you should
be safe.  There hasn't been a -kthread option for a long time.

-- 
	Dan Nelson
	dnelson at allantgroup.com