Mercurial > hg > xemacs-beta
annotate tests/sigpipe.c @ 1268:fffe735e63ee
[xemacs-hg @ 2003-02-07 11:50:50 by ben]
fixes for menu crashes + better preemption behavior
This contains two related changes:
(1) Fix problems with reentrant calling of lwlib and associated
crashes when selecting menu items.
(2) Improve redisplay handling of preemption. Turn on lazy lock
and hold down page-down or page-up and you'll see what I mean.
They are related because they both touch on the code that retrieves
events and handles the internal queues.
console-msw.h, event-msw.c, event-stream.c, events.h, menubar-msw.c, menubar-x.c, menubar.h: mswindows_protect_modal_loop() has been generalized to
event_stream_protect_modal_loop(), and moved to event-stream.c.
mswindows_in_modal_loop ->in_modal_loop likewise. Changes in
event-msw.c and menubar-msw.c for the new names and calling format
(use structures instead of static variables in menubar-msw.c).
Delete former in_menu_callback and use in_modal_loop in its place.
Remove emacs_mswindows_quit_check_disallowed_p(), superseded by
in_modal_loop. Use event_stream_protect_modal_loop() in
pre_activate_callback() so that we get no lwlib reentrancy.
Rearrange some of the code in event-msw.c to be grouped better.
Make mswindows_drain_windows_queue() respect in_modal_loop and
do nothing if so.
cmdloop.c, event-stream.c: Don't conditionalize on LWLIB_MENUBARS_LUCID when giving error when
in_modal_loop, and give better error.
event-Xt.c, event-gtk.c: If in_modal_loop, only retrieve process and timeout events.
Don't retrieve any X events because processing them can lead
to reentrancy in lwlib -> death.
event-stream.c: Remove unused parameter to check_event_stream_ok() and change
all callers.
lisp.h, event-stream.c: Rearrange some functions for increased clarity -- in particular,
group all the input-pending/QUIT-related stuff together, and
put right next to next-event stuff, to which it's related.
Add the concept of "HOW_MANY" -- when asking whether user input
is pending, you can ask if at least HOW_MANY events are pending,
not just if any are. Add parameter to detect_input_pending()
for this. Change recursive_sit_for from a Lisp_Object (which
could only be Qt or Qnil) to an int, like it should be.
event-Xt.c, event-gtk.c, event-xlike-inc.c: New file.
Abstract out similar code in event_{Xt/gtk}_pending_p() and write
only once, using include-file tricks. Rewrite this function to
implement HOW_MANY and only process events when not in_modal_loop.
event-msw.c: Implement HOW_MANY and only process events when not in_modal_loop.
event-tty.c: Implement HOW_MANY.
redisplay.c: Add var `max-preempts' to control maximum number of preempts.
(#### perhaps not useful) Rewrite preemption check so that,
rather than preempting when any user events are available, only
preempt when a certain number (currently 4) of them are backed up.
This effectively allows redisplay to proceed to completion in the
presence of a fast auto-repeat (usually the auto-repeating is
generated dynamically as necessary), and you get much better
display behavior with lazy-lock active.
event-unixoid.c: Comment changes.
event-stream.c: Rewrite discard-input much more simply and safely using the
drain-queue functions. I think the old version might loop
forever if called when in_modal_loop.
SEMI-UNRELATED CHANGES:
-----------------------
event-stream.c: Turn QUIT-checking back on when running the pre-idle hook so it
can be quit out of.
indent.c: Document exact functioning of `vertical-motion' better, and its
differences from GNU Emacs.
| author | ben |
|---|---|
| date | Fri, 07 Feb 2003 11:50:54 +0000 |
| parents | 3f6adebda25c |
| children | 679041362cd4 |
| rev | line source |
|---|---|
| 1231 | 1 /* code is all from loser.c and loser.el by Mly |
| 2 | |
| 3 Copyright (C) 2002 Richard Mlynarik <mly@pobox.com> | |
| 4 | |
| 5 This is part of XEmacs | |
| 6 | |
| 7 Compile this file. Run it in the background giving it a command line | |
| 8 argument PORT which is a positive integer 1024 < PORT < 32768 (avoid the | |
| 9 numbers assigned in /etc/services). | |
| 10 | |
| 11 Then start up a fresh (you're going to crash) XEmacs. Execute the following | |
| 12 | |
| 13 (defun lose (port) | |
| 14 (interactive "nUrk: ") | |
| 15 (require 'comint) | |
| 16 (while t | |
| 17 (condition-case e | |
| 18 (let* ((name "*lose*") | |
| 19 (b (get-buffer-create name))) | |
| 20 (switch-to-buffer b) | |
| 21 (comint-mode) | |
| 22 (comint-exec b name (cons "127.0.0.1" port) nil '()) | |
| 23 (process-send-string (get-buffer-process b) "\377\373\001") | |
| 24 (process-send-string (get-buffer-process b) "\377\373\001")) | |
| 25 (error (message "URK: %s" e)) (sit-for 1)))) | |
| 26 | |
| 27 Then M-x lose RET PORT RET and you lose big (in XEmacs 21.1, anyway). | |
| 28 Note: the error messages are proper functioning. What should eventually | |
| 29 happen after a number of SIGPIPEs is that you get a SIGSEGV and life is | |
| 30 bad and XEmacs is dead. | |
| 31 */ | |
| 32 | |
| 33 #include <arpa/inet.h> | |
| 34 | |
| 35 int | |
| 36 main (int argc, char **argv) | |
| 37 { | |
| 38 struct sockaddr_in junk; | |
| 39 int s; | |
| 40 | |
| 41 memset (&junk, 0, sizeof (junk)); | |
| 42 | |
| 43 junk.sin_family = AF_INET; | |
| 44 junk.sin_addr.s_addr = htonl (INADDR_ANY); /* un*x sucks */ | |
| 45 junk.sin_port = htons (atoi (argv[1])); /* un*x blows */ | |
| 46 | |
| 47 s = socket (PF_INET, SOCK_STREAM, 0); | |
| 48 | |
| 49 bind (s, (struct sockaddr *)&junk, sizeof (junk)); | |
| 50 | |
| 51 listen (s, 1); | |
| 52 | |
| 53 for (;;) | |
| 54 { | |
| 55 int loser = accept (s, NULL, 0); | |
| 56 close (loser); | |
| 57 } | |
| 58 } | |
| 59 |