Re: why "in_sighandler"?

[Jan D.]

Stefan Monnier wrote:
> Could someone explain the difference between `handling_signal' and
> `in_sighandler'?  Depending on the answer I'm likely to suggest a renaming,
> since it seems that either they are the same and should be merged or they
> are different and should say so directly in their name.
>   

handling_signal may be non-zero even if no signal handler is invoked.  
For example, from UNBLOCK_INPUT (via reinvoke_input_signal => 
handle_async_input).  Also if SYNC_INPUT is used.  So handling_signal 
really means "handling X11/GUI event".  I needed a variable that was 
only set when the signal handler is running.  Maybe setting 
handling_signal is an error in the non-signalling cases, I don't really 
know.

   Jan D.