Subj : Re: async signal safety? [was Re: Semaphores and pthreads]
To   : comp.programming.threads
From : Alexander Terekhov
Date : Tue Jan 11 2005 12:52 pm


Alexander Terekhov wrote:
> 
> Jomu wrote:
> [...]
> > My rationale was that these handlers are invoked
> > only when signaled threads were out of any pthread_ code
> 
> To be safe, your signaled threads must be out of any async-signal-
> UNsafe stuff (not only "pthread_ code"), must better NOT touch errno
> (it can be modified even by async-cancel-safe calls). And your
                                    ^
                                    |
I meant async-signal-safe ----------+ (but they are not really
"safe", so to say ;-) ).

> handlers should better NOT call any cancel points (there are a few
> of them among async-signal-"safe" calls).

regards,
alexander.

.