Re: sleep-for documentation and how to pause reliably

[Eli Zaretskii]

> From: Thierry Volpiatto <address@hidden>
> Date: Fri, 15 Feb 2013 11:19:27 +0100
> 
> > Am I missing something?  If not, apart of fixing the docs, _is_ there
> > any way to wait reliably when async subprocesses are running and
> > producing output?
> What about using a sentinel?
> 
> (progn
>   (let ((proc (start-process-shell-command "ls" nil "ls")))
>     (set-process-sentinel proc #'(lambda (process event)
>                                    (when (string= event "finished\n"))
>                                    (sleep-for 20)
>                                    (message "hi after 20s sleeping"))))
>   (message "Hi now sleeping 20s"))

Thanks, but that's not what I meant.  I meant, suppose you must
reliably wait in a Lisp program that doesn't launch any subprocesses,
but should always wait for N seconds even if there are some async
subprocesses running in parallel.  IOW, the code that must pause
doesn't itself launch any subprocesses, it just needs to wait.