Re: [patch] threading enhancements, tid-2.5.47-C0

[Jamie Lokier]

Ulrich Drepper wrote:
> > - of
> > the order of a single system call time, i.e. not significant.  (That
> > delay is much shorter than signal delivery time itself).  No signals
> > are actually _lost_,
> 
> Of course they can get lost.  Normal Unix signals are not queued.

Oh yes they are.  Libc info for "Why Block":

   Temporary blocking of signals with `sigprocmask' gives you a way to
   prevent interrupts during critical parts of your code.  *If signals
   arrive in that part of the program, they are delivered later, after you
   unblock them.*

And sigpending(2):

   The sigpending call allows the examination of pending signals (ones
   which have been raised while blocked).  The signal mask of pending
   signals is stored in set".

-- Jamie