Mutual exclusion in Emacs

Mutual exclusion in Emacs

[Matthieu Moy]

Hi ! 

How  is concurrency  managed in  Emacs?  I know  there's no  threading
support, but since you can launch several asynchronous processes, with
process sentinels, is there a risk that a process sentinel preempt the
non-process-sentinel  code   being  executed,  or   another  processes
sentinel. 

If so, is there a way  to guaranty mutual exclusion if all the process
sentinels access a common ressource? 

Thanks for your help,

-- 
Matthieu

Re: Mutual exclusion in Emacs

[David Kastrup]

Matthieu Moy <MatthieuNOSPAM.Moy@imag.fr.invalid> writes:

> How  is concurrency  managed in  Emacs?  I know  there's no  threading
> support, but since you can launch several asynchronous processes, with
> process sentinels, is there a risk that a process sentinel preempt the
> non-process-sentinel  code   being  executed,  or   another  processes
> sentinel. 
> 
> If so, is there a way  to guaranty mutual exclusion if all the process
> sentinels access a common ressource? 

Is there anything wrong with the Elisp manual?  I thought it was
explained pretty thoroughly just at what points of time sentinels may
get run.

-- 
David Kastrup, Kriemhildstr. 15, 44793 Bochum

Re: Mutual exclusion in Emacs

[Matthieu Moy]

David Kastrup <dak@gnu.org> writes:

> Is there anything wrong with the Elisp manual?  I thought it was
> explained pretty thoroughly just at what points of time sentinels may
> get run.

Woops, thanks. 

That's the problem with a  self-documented software : I never read the
manual ;-) and neither C-h  f set-process-sentinel nor M-x apropos RET
mutex RET helped me :-(.

-- 
Matthieu