[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 Remove emacs_mswindows_quit_check_disallowed_p(), superseded by in_modal_loop.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.

##   Common Makefile section for modules in XEmacs.
##   Copyright (C) 2002 Jerry James.

## This file is part of XEmacs.

## XEmacs is free software; you can redistribute it and/or modify it
## under the terms of the GNU General Public License as published by the
## Free Software Foundation; either version 2, or (at your option) any
## later version.

## XEmacs is distributed in the hope that it will be useful, but WITHOUT
## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
## FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
## for more details.

## You should have received a copy of the GNU General Public License
## along with XEmacs; see the file COPYING.  If not, write to
## the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
## Boston, MA 02111-1307, USA.

## Synched up with: Not in FSF.

## This is more complicated than would normally be the case, as this makefile
## has been tailored to work both inside and independently of the XEmacs
## source tree, and to support both module and non-module building inside the
## source tree.

## Note: This will be appended to the individual module Makefiles by configure.

SRC_SRCS:=$(SRCS:%=$(srcdir)/%)
OBJS=$(SRCS:.c=.o)

SHELL=/bin/sh
RM=rm -f
PROGNAME=@PROGNAME@
CFLAGS=@CFLAGS@
INSTALL=@INSTALL@
version=@version@
prefix=@prefix@
exec_prefix=@exec_prefix@
libdir=@libdir@
instvardir=@instvardir@
configuration=@configuration@
moduledir=@moduledir@
with_modules=@with_modules@

srcdir=@srcdir@
VPATH=@srcdir@

MODCC=@MOD_CC@
MODARCHDIR=@MODARCHDIR@
MAKE_DOCFILE=@MAKE_DOCFILE@
MODCFLAGS=@MODCFLAGS@
INSTALLPATH=@INSTALLPATH@
INSTALL_PROGRAM=@MOD_INSTALL_PROGRAM@
OBJECT_TO_BUILD=@OBJECT_TO_BUILD@

.PHONY:	clean distclean install
all: $(OBJECT_TO_BUILD)

.c.o:
	$(MODCC) $(MODCFLAGS) -c $<

$(MODNAME).ell: $(OBJS) $(MODNAME)_i.o
	$(MODCC) --mode=link --mode=verbose --mod-output=$@ $^ $(LDFLAGS)

$(MODNAME)_i.c: $(SRCS)
	ELLMAKEDOC=$(MAKE_DOCFILE) $(MODCC) --mode=init --mod-output=$@ \
	--mod-name=$(MODNAME) --mod-version=$(MODVER) \
	--mod-title=$(MODTITLE) $(SRC_SRCS)

clean:
	$(RM) $(MODNAME).ell $(OBJS) $(MODNAME)_i.* *~

distclean: clean
	$(RM) Makefile config.* configure

extraclean: distclean

install: $(OBJECT_TO_BUILD)
	$(INSTALL_PROGRAM) $< $(INSTALLPATH)