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| author | Chong Yidong <cyd@stupidchicken.com> | 2006-08-25 02:58:08 +0000 |
|---|---|---|
| committer | Chong Yidong <cyd@stupidchicken.com> | 2006-08-25 02:58:08 +0000 |
| commit | fda9748457d804a6e46ebc7054f0976aed516e71 (patch) | |
| tree | 8365c4fc51b0b1b19f83a4d3f10eee818491e28b | |
| parent | 6c5d6b6ce728bd25f6e72bfe8124059d6ded0744 (diff) | |
| download | emacs-fda9748457d804a6e46ebc7054f0976aed516e71.tar.gz | |
* os.texi (Timers): Avoid waiting inside timers.
| -rw-r--r-- | lispref/ChangeLog | 4 | ||||
| -rw-r--r-- | lispref/os.texi | 7 |
2 files changed, 11 insertions, 0 deletions
diff --git a/lispref/ChangeLog b/lispref/ChangeLog index 12528d35e55..50c945e3b11 100644 --- a/lispref/ChangeLog +++ b/lispref/ChangeLog @@ -1,3 +1,7 @@ +2006-08-24 Chong Yidong <cyd@stupidchicken.com> + + * os.texi (Timers): Avoid waiting inside timers. + 2006-08-21 Lute Kamstra <lute@gnu.org> * Makefile.in: Use ../man/texinfo.tex to build elisp.dvi. diff --git a/lispref/os.texi b/lispref/os.texi index d227cf92bcf..b5522dc2a98 100644 --- a/lispref/os.texi +++ b/lispref/os.texi @@ -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 +timer. + If a timer function calls functions that can change the match data, it should save and restore the match data. @xref{Saving Match Data}. |