annotate src/syssignal.h @ 872:79c6ff3eef26

[xemacs-hg @ 2002-06-20 21:18:01 by ben] font changes etc.; some 21.4 changes mule/mule-msw-init-late.el: Specify charset->windows-registry conversion. mule/mule-x-init.el: Delete extra mule font additions here. Put them in faces.c. cl-macs.el: Document better. font-lock.el: Move Lisp function regexp to lisp-mode.el. lisp-mode.el: Various indentation fixes: Handle flet functions better. Handle argument lists in defuns and flets. Handle quoted lists, e.g. property lists -- don't indent like function calls. Distinguish between lambdas and other lists. lisp-mode.el: Handle this form. faces.el, font-menu.el, font.el, gtk-faces.el, msw-faces.el, msw-font-menu.el, x-faces.el, x-init.el: Major overhaul of face-handling code: -- Fix lots of bogus code in msw-faces.el, msw-font-menu.el, font-menu.el that was "truenaming" font specs -- i.e. in the process of frobbing a particular field in a general user-specified font spec with wildcarded fields, sticking in particular values for all the remaining wildcarded fields. This bug was rampant everywhere except in x-faces.el (the oldest and only correctly written code). This also means that we need to work with font names at all times and not font instances, because a font instance is essentially a truenamed font. -- Total rewrite of extremely junky code in msw-faces.el. Work with names as well as font instances, and return names; stop truenaming when canonicalizing and frobbing; fix handling of the combined style field, i.e. weight/slant (also fixed in font.el). -- Totally rewrite the frobbing functions in faces.el. This time, we frob all the instantiators rather than just computing a single instance value and working backwards. That way, e.g., `bold' will work for all charsets that have bold available, rather than only for whatever charset was part of the computed font instance (another example of the truename virus). Also fix up code to look at the fallbacks (all of them) when no global value present, so we don't need to put something in the global value. Intelligently handle a request to frob a buffer locale, rather than signalling an error. When frobbing instantiators, try hard to figure out what device type is associated with them, and frob each according to its own proper device type. Correctly handle inheritance vectors given as instantiators. Preserve existing tags when putting back frobbed instantiators. Extract out general specifier-frobbing code into specifier.el. Document everything cleanly. Do lots of other things better, etc. -- Don't duplicatively set a global specification for the default font -- it's already in the fallback and we no longer need a default global specification present. Delete various code in x-faces.el and msw-faces.el that duplicated the lists of fonts in faces.c. -- init-global-faces was not being called at all under MS Windows! Major bogosity. That caused device-specific values to get stuck into all the fonts, making it very hard to change them -- setting global specs caused nothing to happen. -- Correct weight names in font.el. -- Lots more font fixups in objects*.c. Printer.el: Warning fix. specifier.el: Add more args to map-specifier. Add various "heuristic" specifier functions to aid in creation of specifier-munging code such as in faces.el. subr.el: New functions. lwlib.c: Fix warning. config.inc.samp: Clean up, add args to control fastcall (not yet supported! the changes needed are in another ws of mine), profile support, vc6 support, union-type. xemacs.dsp, xemacs.mak: Semi-major overhaul. Fix bug where dump-id was always getting recomputed, forcing a redump even when nothing changed. Add support for fastcall. Support edit-and-continue (on by default) with vc6. Use incremental linking when doing a debug compilation. Add support for profiling. Consolidate the various debug flags. Partial support for "batch-compiling" -- compiling many files on a single invocation of the compiler. Doesn't seem to help that much for me, so it's not finished or enabled by default. Remove HAVE_MSW_C_DIRED, we always do. Correct some sloppy use of directories. s/cygwin32.h: Allow pdump to work under Cygwin (mmap is broken, so need to undefine HAVE_MMAP). s/win32-common.h, s/windowsnt.h: Support for fastcall. Add WIN32_ANY for identifying all Win32 variants (Cygwin, native, MinGW). Both of these are properly used in another ws. alloc.c, balloon-x.c, buffer.c, bytecode.c, callint.c, cm.c, cmdloop.c, cmds.c, console-gtk.c, console-gtk.h, console-msw.c, console-msw.h, console-stream.c, console-stream.h, console-tty.c, console-tty.h, console-x.c, console-x.h, console.c, console.h, device-gtk.c, device-msw.c, device-tty.c, device-x.c, device.c, device.h, devslots.h, dialog-gtk.c, dialog-msw.c, dialog-x.c, dialog.c, dired-msw.c, editfns.c, emacs.c, event-Xt.c, event-gtk.c, event-msw.c, event-stream.c, event-tty.c, event-unixoid.c, events.c, extents.c, extents.h, faces.c, fileio.c, fns.c, frame-gtk.c, frame-msw.c, frame-tty.c, frame-x.c, frame.c, frame.h, glyphs-eimage.c, glyphs-gtk.c, glyphs-msw.c, glyphs-widget.c, glyphs-x.c, glyphs.c, glyphs.h, gui-gtk.c, gui-msw.c, gui-x.c, gui.c, gutter.c, input-method-xlib.c, intl-encap-win32.c, intl-win32.c, keymap.c, lisp.h, macros.c, menubar-gtk.c, menubar-msw.c, menubar-x.c, menubar.c, menubar.h, minibuf.c, mule-charset.c, nt.c, objects-gtk.c, objects-gtk.h, objects-msw.c, objects-msw.h, objects-tty.c, objects-tty.h, objects-x.c, objects-x.h, objects.c, objects.h, postgresql.c, print.c, process.h, redisplay-gtk.c, redisplay-msw.c, redisplay-output.c, redisplay-tty.c, redisplay-x.c, redisplay.c, redisplay.h, scrollbar-gtk.c, scrollbar-msw.c, scrollbar-x.c, scrollbar.c, select-gtk.c, select-msw.c, select-x.c, select.c, signal.c, sound.c, specifier.c, symbols.c, syntax.c, sysdep.c, syssignal.h, syswindows.h, toolbar-common.c, toolbar-gtk.c, toolbar-msw.c, toolbar-x.c, toolbar.c, unicode.c, window.c, window.h: The following are the major changes made: (1) Separation of various header files into an external and an internal version, similar to the existing separation of process.h and procimpl.h. Eventually this should be done for all Lisp objects. The external version has the same name as currently; the internal adds -impl. The external file has XFOO() macros for objects, but the structure is opaque and defined only in the internal file. It's now reasonable to move all prototypes in lisp.h into the appropriate external file, and this should be done. Currently, separation has been done on extents.h, objects*.h, console.h, device.h, frame.h, and window.h. For c/d/f/w, the most basic properties are available in the external header file, with the macros resolving to functions. In the internal header file, the macros are redefined to directly access the structure. Also, the global MARK_FOO_CHANGED macros have been made into functions so that they can be accessed without needing to include lots of -impl headers -- they are used in almost exclusively in non-time-critical functions, and take up enough time that the function overhead will be negligible. Similarly, the function overhead from making the basic properties mentioned above into functions is negligible, and code that does heavy accessing of c/d/f/w structures inevitably ends up needing the internal header files, anyway. (2) More face changes. -- Major rewrite of objects-msw.c. Now handles wildcard specs properly, rather than "truenaming" (or even worse, signalling an error, which previously happened with some of the fallbacks if you tried to use them in make-font-instance!). -- Split charset matching of fonts into two stages -- one to find a font specifically designed for a particular charset (by examining its registry), the second to find a Unicode font that can support the charset. This needs to proceed as two complete, separate instantiations in order to work properly (otherwise many of the fonts in the HELLO page look wrong). This should also make it easy to support iso10646 (Unicode) fonts under X. -- All default values for fonts are now completely specified in the fallbacks. Stuff from mule-x-init.el has all been moved here, merged with the existing specs, and totally rethought so you get sensible results. (HELLO now looks much better!). -- Generalize the "default X/GTK device" stuff into a per-device-type "default device". -- Add mswindows-{set-}charset-registry. In time, charset<->code-page conversion functions will be removed. -- Wrap protective code around calls to compute device specifier tags, and do this computation before calling the face initialization code because the latter may need these tags to be correctly updated. (3) Other changes. EmacsFrame.c, glyphs-msw.c, eval.c, gui-x.c, intl-encap-win32.c, search.c, signal.c, toolbar-msw.c, unicode.c: Warning fixes. config.h.in: #undefs meant to be frobbed by configure *MUST* go inside of #ifndef WIN32_NO_CONFIGURE, and everything else *MUST* go outside! eval.c: Let detailed backtraces be detailed. specifier.c: Don't override user's print-string-length/print-length settings. glyphs.c: New function image-instance-instantiator. config.h.in, sysdep.c: Changes for fastcall. sysdep.c, nt.c: Fix up a previous botched patch that tried to add support for both EEXIST and EACCES. IF THE BOTCHED PATCH WENT INTO 21.4, THIS FIXUP NEEDS TO GO IN, TOO. search.c: Fix *evil* crash due to incorrect synching of syntax-cache code with 21.1. THIS SHOULD GO INTO 21.4.
author ben
date Thu, 20 Jun 2002 21:19:10 +0000
parents a634e3b7acc8
children 13e47461d509
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1 /* syssignal.h - System-dependent definitions for signals.
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2 Copyright (C) 1992, 1993 Free Software Foundation, Inc.
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3 Copyright (C) 1996 Ben Wing.
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4
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5 This file is part of XEmacs.
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6
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7 XEmacs is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 2, or (at your option) any
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10 later version.
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11
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12 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with XEmacs; see the file COPYING. If not, write to
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19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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20 Boston, MA 02111-1307, USA. */
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21
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22 /* Synched up with: FSF 19.30. */
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23
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24 #ifndef INCLUDED_syssignal_h_
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25 #define INCLUDED_syssignal_h_
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26
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27 /* In the old world, one could not #include <signal.h> here. The party line
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28 was that that header should always be #included before <config.h>, because
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29 some configuration files (like s/hpux.h) indicate that SIGIO doesn't work
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30 by #undef-ing SIGIO, and if this file #includes <signal.h>, then that will
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31 re-#define SIGIO and confuse things.
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32
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33 This was, however, a completely fucked up state of affairs, because on some
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34 systems it's necessary for the s/m files to #define things in order to get
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35 <signal.h> to provide the right typedefs, etc. And it's generally a broken
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36 concept for <config.h> to not be the very very first file included.
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37
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38 So instead of #undef'ing SIGIO in the various s/m files, I've changed them
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39 to define BROKEN_SIGIO instead, then we (syssignal.h) do an #undef SIGIO
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40 at the end, after including signal.h. Therefore, it's important that
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41 <signal.h> not be included after "syssignal.h", but that's the normal state:
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42 nothing should be directly including <signal.h> these days.
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43 -- jwz, 29-nov-93
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44 */
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45
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46 #include <signal.h>
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47 #include <errno.h>
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48
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49 /* SIGPOLL is the SVR4 signal. Those systems generally define
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50 SIGIO as an alias for SIGPOLL, but just in case ... */
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51
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52 #if defined (BROKEN_SIGIO)
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53 # if defined (SIGIO) && defined (SIGPOLL)
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54 # if SIGIO == SIGPOLL
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55 # undef SIGIO
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56 # undef SIGPOLL
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57 # else
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58 # undef SIGIO
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59 # endif
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60 # endif
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61 #else /* Not BROKEN_SIGIO */
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62 # if !defined (SIGIO) && defined (SIGPOLL)
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63 # define SIGIO SIGPOLL
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64 # endif
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65 #endif
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66
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67 /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals
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68 testing SIGCHLD. */
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69 #if defined (SIGCLD) && !defined (SIGCHLD)
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70 # define SIGCHLD SIGCLD
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71 #endif /* SIGCHLD */
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72
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73 #ifdef BROKEN_SIGCHLD
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74 #undef SIGCHLD
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75 #endif
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77 #ifdef SIGCHLD
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78 #define EMACS_BLOCK_SIGCHLD EMACS_BLOCK_SIGNAL (SIGCHLD)
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79 #define EMACS_UNBLOCK_SIGCHLD EMACS_UNBLOCK_SIGNAL (SIGCHLD)
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80 #else
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81 #define EMACS_BLOCK_SIGCHLD
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82 #define EMACS_UNBLOCK_SIGCHLD
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83 #endif
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84
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85 /* According to W.R. Stevens __Advanced Programming in the Unix
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86 Environment__, there are four different paradigms for handling
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87 signals. We use autoconf to tell us which one applies.
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88
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89 Note that on some systems, more than one paradigm is implemented
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90 (typically, the POSIX sigaction/sigprocmask and either the older
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91 SYSV or BSD way). In such a case, we prefer the POSIX way.
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92
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93 We used to say this:
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94
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95 [[ NOTE: We use EMACS_* macros for most signal operations, but
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96 just signal() for the standard signal-setting operation.
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97 Perhaps we should change this to EMACS_SIGNAL(), but that runs
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98 the risk of someone forgetting this convention and calling
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99 signal() directly. ]]
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100
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101 But current policy is to avoid playing with macros as much as
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102 possible, since in the long run it really just ends up creating
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103 unmaintainable code -- someone newly reading the code is never
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104 going to realize exactly which calls are redirected, and on
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105 which systems, and where the redirection occurs.
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106
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107 Possibly we should use the new "qxe" convention.
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108 */
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110 #ifndef NeXT
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111 typedef RETSIGTYPE (XCDECL * signal_handler_t) (int);
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112 #endif
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113
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114 #if defined (HAVE_SIGPROCMASK)
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115
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116 /* The POSIX way (sigaction, sigprocmask, sigpending, sigsuspend) */
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117
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118 signal_handler_t qxe_reliable_signal (int signal_number,
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119 signal_handler_t action);
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120
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121 #define EMACS_SIGNAL qxe_reliable_signal
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122
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123 #define EMACS_BLOCK_SIGNAL(sig) do \
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124 { \
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125 sigset_t ES_mask; \
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126 sigemptyset (&ES_mask); \
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127 sigaddset (&ES_mask, sig); \
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128 sigprocmask (SIG_BLOCK, &ES_mask, NULL); \
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129 } while (0)
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130 #define EMACS_UNBLOCK_SIGNAL(sig) do \
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131 { \
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132 sigset_t ES_mask; \
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133 sigemptyset (&ES_mask); \
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134 sigaddset (&ES_mask, sig); \
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135 sigprocmask (SIG_UNBLOCK, &ES_mask, NULL); \
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136 } while (0)
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137 #define EMACS_UNBLOCK_ALL_SIGNALS() do \
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138 { \
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139 sigset_t ES_mask; \
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140 sigemptyset (&ES_mask); \
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141 sigprocmask (SIG_SETMASK, &ES_mask, NULL); \
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142 } while (0)
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143 #define EMACS_WAIT_FOR_SIGNAL(sig) do \
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144 { \
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145 sigset_t ES_mask; \
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146 sigprocmask (0, NULL, &ES_mask); \
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147 sigdelset (&ES_mask, sig); \
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148 sigsuspend (&ES_mask); \
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149 } while (0)
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150 #define EMACS_REESTABLISH_SIGNAL(sig, handler)
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151
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152 #elif defined (HAVE_SIGBLOCK)
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153
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154 /* The older BSD way (signal/sigvec, sigblock, sigsetmask, sigpause) */
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155
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156 /* It's OK to use signal() here directly. No unreliable signal
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157 problems. However, we use sigvec() because it allows us to
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158 request interruptible I/O. */
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159
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160 #define EMACS_SIGNAL qxe_reliable_signal
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161
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162 /* Is it necessary to define sigmask like this? */
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163 #ifndef sigmask
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164 # define sigmask(no) (1L << ((no) - 1))
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165 #endif
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166
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167 #define EMACS_BLOCK_SIGNAL(sig) sigblock (sigmask (sig))
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168 #define EMACS_UNBLOCK_SIGNAL(sig) sigsetmask (sigblock (0) & ~sigmask (sig))
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169 #define EMACS_UNBLOCK_ALL_SIGNALS() sigsetmask (0)
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170 #define EMACS_WAIT_FOR_SIGNAL(sig) do \
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171 { \
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172 int ES_mask = sigblock (0); \
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173 sigpause (ES_mask & ~sigmask (sig)); \
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174 } while (0)
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175 #define EMACS_REESTABLISH_SIGNAL(sig, handler)
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176
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177 #elif defined (HAVE_SIGHOLD)
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178
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179 /* The older SYSV way (signal/sigset, sighold, sigrelse, sigignore,
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180 sigpause) */
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181
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182 #define EMACS_SIGNAL sigset
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183 #define EMACS_BLOCK_SIGNAL(sig) sighold (sig)
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184 #define EMACS_UNBLOCK_SIGNAL(sig) sigrelse (sig)
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185 /* #### There's not really any simple way to implement this.
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186 Since EMACS_UNBLOCK_ALL_SIGNALS() is only called once (at startup),
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187 it's probably OK to just ignore it. */
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188 #define EMACS_UNBLOCK_ALL_SIGNALS() 0
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189 #define EMACS_WAIT_FOR_SIGNAL(sig) sigpause (sig)
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190 #define EMACS_REESTABLISH_SIGNAL(sig, handler)
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191
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192 #elif defined (WIN32_NATIVE)
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193
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194 /* MS Windows signal emulation (in turns emulates the sigset/sighold
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195 paradigm) */
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196
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197 #define EMACS_SIGNAL mswindows_sigset
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198 #define EMACS_BLOCK_SIGNAL(sig) mswindows_sighold (sig)
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199 #define EMACS_UNBLOCK_SIGNAL(sig) mswindows_sigrelse (sig)
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200 /* #### There's not really any simple way to implement this.
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201 Since EMACS_UNBLOCK_ALL_SIGNALS() is only called once (at startup),
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202 it's probably OK to just ignore it. */
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203 #define EMACS_UNBLOCK_ALL_SIGNALS() 0
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204 #define EMACS_WAIT_FOR_SIGNAL(sig) mswindows_sigpause (sig)
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205 #define EMACS_REESTABLISH_SIGNAL(sig, handler)
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206
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207 /* Defines that we need that aren't in the standard signal.h */
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208 #define SIGHUP 1 /* Hang up */
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209 #define SIGQUIT 3 /* Quit process */
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210 #define SIGKILL 9 /* Die, die die */
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211 #define SIGALRM 14 /* Alarm */
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212 #define SIGPROF 29 /* Profiling timer exp */
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213
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214 #else
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215
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216 /* The oldest SYSV way (signal only; unreliable signals) */
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217
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218 /* Old USG systems don't really have signal blocking.
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219 We indicate this by not defining EMACS_BLOCK_SIGNAL or
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220 EMACS_WAIT_FOR_SIGNAL. */
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221 #define EMACS_SIGNAL signal
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222 #define EMACS_UNBLOCK_SIGNAL(sig) 0
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223 #define EMACS_UNBLOCK_ALL_SIGNALS() 0
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224 #define EMACS_REESTABLISH_SIGNAL(sig, handler) do \
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225 { \
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226 int old_errno = errno; \
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227 signal (sig, handler); \
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228 errno = old_errno; \
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229 } while (0)
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230
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231 /* Under SYSV, setting a signal handler for SIGCLD causes
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232 SIGCLD to immediately be sent if there any unwaited processes
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233 out there. This means that the SIGCLD handler *must* call
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234 wait() to reap the status of all processes -- it cannot
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235 simply set a flag and then reestablish the handler, because
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236 it will get called again, infinitely. We only need to
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237 worry about this on systems where signals need to be
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238 reestablished (SYSV Release 2 and earlier). */
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239 #define OBNOXIOUS_SYSV_SIGCLD_BEHAVIOR
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240
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241 #endif /* different signalling methods */
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242
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243 /* On bsd, [man says] kill does not accept a negative number to kill a pgrp.
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244 Must do that using the killpg call. */
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245 #ifdef HAVE_KILLPG
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246 #define EMACS_KILLPG(pid, signo) killpg (pid, signo)
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247 #elif defined (WIN32_NATIVE)
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248 #define EMACS_KILLPG(pid, signo) should never be called
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249 #else
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250 #define EMACS_KILLPG(pid, signo) kill (-(pid), signo)
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251 #endif
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252
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253 #ifndef NSIG
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254 # define NSIG (SIGUSR2+1) /* guess how many elements are in sys_siglist... */
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255 #endif
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256
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257 /* SYS_SIGLIST_DECLARED is determined by configure. On Linux, it seems,
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258 configure incorrectly fails to find it, so s/linux.h defines
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259 HAVE_SYS_SIGLIST. */
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260 #if !defined (SYS_SIGLIST_DECLARED) && !defined (HAVE_SYS_SIGLIST)
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261 extern const char *sys_siglist[];
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262 #endif
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263
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264 #ifdef SIGDANGER
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265 SIGTYPE memory_warning_signal (int sig);
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266 #endif
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267
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268 #if defined (WIN32_NATIVE) || defined (CYGWIN_BROKEN_SIGNALS)
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269 typedef void (__cdecl *mswindows_sighandler) (int);
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270
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271 /* Prototypes for signal functions, see win32.c */
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272 int mswindows_sighold (int nsig);
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273 int mswindows_sigrelse (int nsig);
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274 int mswindows_sigpause (int nsig);
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275 int mswindows_raise (int nsig);
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276 mswindows_sighandler mswindows_sigset (int sig, mswindows_sighandler handler);
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277
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278 #endif /* defined (WIN32_NATIVE) || defined (CYGWIN_BROKEN_SIGNALS) */
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280 signal_handler_t set_timeout_signal (int signal_number,
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281 signal_handler_t action);
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282
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284 #endif /* INCLUDED_syssignal_h_ */