Subject: Re: SYNC_INPUT and 23.1.

From: YAMAMOTO Mitsuharu <[email-masked]>
Date: Thu, 13 Mar 2008 09:44:48 +0900

>>>>> On Wed, 12 Mar 2008 13:51:35 -0400, Richard Stallman <[email-masked]> said:

>     Even with SYNC_INPUT, atimer functions (except poll_for_input)
>     may still call malloc in the signal handler context.  So
>     emacs_blocked_malloc etc. were actually meaningful even in
>     SYNC_INPUT environments.

> Why is that?  Can it be eliminated?

Here's the list of atimer functions (the third argument to
start_atimer):

  xg_process_timeouts, poll_for_input, show_hourglass,
  create_process_1, x_process_timeouts

Among them, show_hourglass, x_process_timeouts, and
xg_process_timeouts will call async-signal unsafe functions.

I think show_hourglass can be deferred until the next QUIT.  But not
sure about x_process_timeouts and xg_process_timeouts.

				     YAMAMOTO Mitsuharu
				[email-masked]