Commit fda97484 authored by Chong Yidong's avatar Chong Yidong
Browse files

* os.texi (Timers): Avoid waiting inside timers.

parent 6c5d6b6c
2006-08-24 Chong Yidong <>
* os.texi (Timers): Avoid waiting inside timers.
2006-08-21 Lute Kamstra <>
* Use ../man/texinfo.tex to build elisp.dvi.
......@@ -1394,6 +1394,13 @@ both before and after changing the buffer, to separate the timer's
changes from user commands' changes and prevent a single undo entry
from growing to be quite large.
Timer functions should also avoid calling functions that cause Emacs
to wait, such as @code{sit-for} (@pxref{Waiting}). This can lead to
unpredictable effects, since other timers (or even the same timer) can
run while waiting. If a timer function needs to perform an action
after a certain time has elapsed, it can do this by scheduling a new
If a timer function calls functions that can change the match data,
it should save and restore the match data. @xref{Saving Match Data}.
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