GNU bug report logs - #12450
Remove configure's --without-sync-input option.

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Package: emacs;

Reported by: Paul Eggert <eggert <at> cs.ucla.edu>

Date: Sat, 15 Sep 2012 07:57:02 UTC

Severity: normal

Done: Paul Eggert <eggert <at> cs.ucla.edu>

Bug is archived. No further changes may be made.

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From: Paul Eggert <eggert <at> cs.ucla.edu>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: lekktu <at> gmail.com, Richard Stallman <rms <at> gnu.org>, 12450 <at> debbugs.gnu.org
Subject: bug#12450: Remove configure's --without-sync-input option.
Date: Sun, 16 Sep 2012 00:47:57 -0700

On 09/15/2012 11:33 PM, Eli Zaretskii wrote:
>>>> -#ifdef REL_ALLOC
>>>> > >> -  malloc_hysteresis = 32;
>>>> > >> -#else
>>>> > >> -  malloc_hysteresis = 0;
>>>> > >> -#endif
>> > 
>> > malloc_hysteresis is used only by the non-SYNC_INPUT code.
> No, it is also used indirectly, via __malloc_extra_blocks, in
> gmalloc.c and in ralloc.c.

No, it is not used indirectly.  emacs_blocked_malloc is the only
function that uses malloc_hysteresis to set __malloc_extra_blocks.
And emacs_blocked_malloc is invoked only in the non-SYNC_INPUT code.

> But there's something I don't understand about this snippet.  Why does
> it set the value to 32 conditioned by REL_ALLOC ...

A nice property of removing the non-SYNC_INPUT code is that
we don't need to worry about cruft like that, because it's
not being used and we can remove it.
This bug report was last modified 12 years and 249 days ago.

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