Mercurial > hg > xemacs-beta
annotate src/syssignal.h @ 5773:94a6b8fbd56e
Use a face, show more context around open parenthesis, #'blink-matching-open
lisp/ChangeLog addition:
2013-12-17 Aidan Kehoe <kehoea@parhasard.net>
* simple.el (blink-matching-open):
When showing the opening parenthesis in the minibiffer, use the
isearch face for it, in case there are multiple parentheses in the
text shown.
When writing moderately involved macros, it's often not enough
just to show the backquote context before the parenthesis
(e.g. @,.`). Skip over that when searching for useful context in
the same way we skip over space and tab.
* simple.el (message):
* simple.el (lmessage):
If there are no ARGS, don't call #'format. This allows extent
information to be passed through to the minibuffer.
It's probably better still to update #'format to preserve extent
info.
| author | Aidan Kehoe <kehoea@parhasard.net> |
|---|---|
| date | Tue, 17 Dec 2013 20:49:52 +0200 |
| parents | 308d34e9f07d |
| children | 574f0cded429 |
| rev | line source |
|---|---|
| 428 | 1 /* syssignal.h - System-dependent definitions for signals. |
| 2 Copyright (C) 1992, 1993 Free Software Foundation, Inc. | |
| 814 | 3 Copyright (C) 1996 Ben Wing. |
| 4 | |
| 428 | 5 This file is part of XEmacs. |
| 6 | |
|
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7 XEmacs is free software: you can redistribute it and/or modify it |
| 428 | 8 under the terms of the GNU General Public License as published by the |
|
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9 Free Software Foundation, either version 3 of the License, or (at your |
|
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10 option) any later version. |
| 428 | 11 |
| 12 XEmacs is distributed in the hope that it will be useful, but WITHOUT | |
| 13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 15 for more details. | |
| 16 | |
| 17 You should have received a copy of the GNU General Public License | |
|
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18 along with XEmacs. If not, see <http://www.gnu.org/licenses/>. */ |
| 428 | 19 |
| 20 /* Synched up with: FSF 19.30. */ | |
| 21 | |
| 440 | 22 #ifndef INCLUDED_syssignal_h_ |
| 23 #define INCLUDED_syssignal_h_ | |
| 428 | 24 |
| 25 /* In the old world, one could not #include <signal.h> here. The party line | |
| 26 was that that header should always be #included before <config.h>, because | |
| 27 some configuration files (like s/hpux.h) indicate that SIGIO doesn't work | |
| 28 by #undef-ing SIGIO, and if this file #includes <signal.h>, then that will | |
| 29 re-#define SIGIO and confuse things. | |
| 30 | |
| 31 This was, however, a completely fucked up state of affairs, because on some | |
| 32 systems it's necessary for the s/m files to #define things in order to get | |
| 33 <signal.h> to provide the right typedefs, etc. And it's generally a broken | |
| 34 concept for <config.h> to not be the very very first file included. | |
| 35 | |
| 36 So instead of #undef'ing SIGIO in the various s/m files, I've changed them | |
| 37 to define BROKEN_SIGIO instead, then we (syssignal.h) do an #undef SIGIO | |
| 38 at the end, after including signal.h. Therefore, it's important that | |
| 39 <signal.h> not be included after "syssignal.h", but that's the normal state: | |
| 40 nothing should be directly including <signal.h> these days. | |
| 41 -- jwz, 29-nov-93 | |
| 42 */ | |
| 43 | |
| 44 #include <signal.h> | |
| 45 #include <errno.h> | |
| 46 | |
| 47 /* SIGPOLL is the SVR4 signal. Those systems generally define | |
| 48 SIGIO as an alias for SIGPOLL, but just in case ... */ | |
| 49 | |
| 50 #if defined (BROKEN_SIGIO) | |
| 51 # if defined (SIGIO) && defined (SIGPOLL) | |
| 52 # if SIGIO == SIGPOLL | |
| 53 # undef SIGIO | |
| 54 # undef SIGPOLL | |
| 55 # else | |
| 56 # undef SIGIO | |
| 57 # endif | |
| 58 # endif | |
| 59 #else /* Not BROKEN_SIGIO */ | |
| 60 # if !defined (SIGIO) && defined (SIGPOLL) | |
| 61 # define SIGIO SIGPOLL | |
| 62 # endif | |
| 63 #endif | |
| 64 | |
| 65 /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals | |
| 66 testing SIGCHLD. */ | |
| 67 #if defined (SIGCLD) && !defined (SIGCHLD) | |
| 68 # define SIGCHLD SIGCLD | |
| 69 #endif /* SIGCHLD */ | |
| 70 | |
| 71 #ifdef BROKEN_SIGCHLD | |
| 72 #undef SIGCHLD | |
| 73 #endif | |
| 74 | |
| 75 #ifdef SIGCHLD | |
| 76 #define EMACS_BLOCK_SIGCHLD EMACS_BLOCK_SIGNAL (SIGCHLD) | |
| 77 #define EMACS_UNBLOCK_SIGCHLD EMACS_UNBLOCK_SIGNAL (SIGCHLD) | |
| 78 #else | |
| 79 #define EMACS_BLOCK_SIGCHLD | |
| 80 #define EMACS_UNBLOCK_SIGCHLD | |
| 81 #endif | |
| 82 | |
| 83 /* According to W.R. Stevens __Advanced Programming in the Unix | |
| 84 Environment__, there are four different paradigms for handling | |
| 85 signals. We use autoconf to tell us which one applies. | |
| 86 | |
| 87 Note that on some systems, more than one paradigm is implemented | |
| 88 (typically, the POSIX sigaction/sigprocmask and either the older | |
| 89 SYSV or BSD way). In such a case, we prefer the POSIX way. | |
| 90 | |
| 613 | 91 We used to say this: |
| 92 | |
| 93 [[ NOTE: We use EMACS_* macros for most signal operations, but | |
| 428 | 94 just signal() for the standard signal-setting operation. |
| 95 Perhaps we should change this to EMACS_SIGNAL(), but that runs | |
| 96 the risk of someone forgetting this convention and calling | |
| 613 | 97 signal() directly. ]] |
| 98 | |
| 99 But current policy is to avoid playing with macros as much as | |
| 100 possible, since in the long run it really just ends up creating | |
| 101 unmaintainable code -- someone newly reading the code is never | |
| 102 going to realize exactly which calls are redirected, and on | |
| 103 which systems, and where the redirection occurs. | |
| 104 | |
| 105 Possibly we should use the new "qxe" convention. | |
| 106 */ | |
| 428 | 107 |
| 872 | 108 typedef RETSIGTYPE (XCDECL * signal_handler_t) (int); |
| 428 | 109 |
| 110 #if defined (HAVE_SIGPROCMASK) | |
| 111 | |
| 112 /* The POSIX way (sigaction, sigprocmask, sigpending, sigsuspend) */ | |
| 113 | |
| 613 | 114 signal_handler_t qxe_reliable_signal (int signal_number, |
| 115 signal_handler_t action); | |
| 116 | |
| 117 #define EMACS_SIGNAL qxe_reliable_signal | |
| 428 | 118 |
| 119 #define EMACS_BLOCK_SIGNAL(sig) do \ | |
| 120 { \ | |
| 121 sigset_t ES_mask; \ | |
| 122 sigemptyset (&ES_mask); \ | |
| 123 sigaddset (&ES_mask, sig); \ | |
| 124 sigprocmask (SIG_BLOCK, &ES_mask, NULL); \ | |
| 125 } while (0) | |
| 126 #define EMACS_UNBLOCK_SIGNAL(sig) do \ | |
| 127 { \ | |
| 128 sigset_t ES_mask; \ | |
| 129 sigemptyset (&ES_mask); \ | |
| 130 sigaddset (&ES_mask, sig); \ | |
| 131 sigprocmask (SIG_UNBLOCK, &ES_mask, NULL); \ | |
| 132 } while (0) | |
| 133 #define EMACS_UNBLOCK_ALL_SIGNALS() do \ | |
| 134 { \ | |
| 135 sigset_t ES_mask; \ | |
| 136 sigemptyset (&ES_mask); \ | |
| 137 sigprocmask (SIG_SETMASK, &ES_mask, NULL); \ | |
| 138 } while (0) | |
| 139 #define EMACS_WAIT_FOR_SIGNAL(sig) do \ | |
| 140 { \ | |
| 141 sigset_t ES_mask; \ | |
| 142 sigprocmask (0, NULL, &ES_mask); \ | |
| 143 sigdelset (&ES_mask, sig); \ | |
| 144 sigsuspend (&ES_mask); \ | |
| 145 } while (0) | |
| 146 #define EMACS_REESTABLISH_SIGNAL(sig, handler) | |
| 2286 | 147 #define SIG_ARG_MAYBE_UNUSED(decl) UNUSED (decl) |
| 428 | 148 |
| 149 #elif defined (HAVE_SIGBLOCK) | |
| 150 | |
| 151 /* The older BSD way (signal/sigvec, sigblock, sigsetmask, sigpause) */ | |
| 152 | |
| 153 /* It's OK to use signal() here directly. No unreliable signal | |
| 154 problems. However, we use sigvec() because it allows us to | |
| 155 request interruptible I/O. */ | |
| 156 | |
| 613 | 157 #define EMACS_SIGNAL qxe_reliable_signal |
| 428 | 158 |
| 159 /* Is it necessary to define sigmask like this? */ | |
| 160 #ifndef sigmask | |
| 161 # define sigmask(no) (1L << ((no) - 1)) | |
| 162 #endif | |
| 163 | |
| 164 #define EMACS_BLOCK_SIGNAL(sig) sigblock (sigmask (sig)) | |
| 165 #define EMACS_UNBLOCK_SIGNAL(sig) sigsetmask (sigblock (0) & ~sigmask (sig)) | |
| 166 #define EMACS_UNBLOCK_ALL_SIGNALS() sigsetmask (0) | |
| 167 #define EMACS_WAIT_FOR_SIGNAL(sig) do \ | |
| 168 { \ | |
| 169 int ES_mask = sigblock (0); \ | |
| 170 sigpause (ES_mask & ~sigmask (sig)); \ | |
| 171 } while (0) | |
| 172 #define EMACS_REESTABLISH_SIGNAL(sig, handler) | |
| 2286 | 173 #define SIG_ARG_MAYBE_UNUSED(decl) UNUSED (decl) |
| 428 | 174 |
| 175 #elif defined (HAVE_SIGHOLD) | |
| 176 | |
| 177 /* The older SYSV way (signal/sigset, sighold, sigrelse, sigignore, | |
| 178 sigpause) */ | |
| 179 | |
| 613 | 180 #define EMACS_SIGNAL sigset |
| 428 | 181 #define EMACS_BLOCK_SIGNAL(sig) sighold (sig) |
| 182 #define EMACS_UNBLOCK_SIGNAL(sig) sigrelse (sig) | |
| 183 /* #### There's not really any simple way to implement this. | |
| 184 Since EMACS_UNBLOCK_ALL_SIGNALS() is only called once (at startup), | |
| 185 it's probably OK to just ignore it. */ | |
| 186 #define EMACS_UNBLOCK_ALL_SIGNALS() 0 | |
| 187 #define EMACS_WAIT_FOR_SIGNAL(sig) sigpause (sig) | |
| 188 #define EMACS_REESTABLISH_SIGNAL(sig, handler) | |
| 2286 | 189 #define SIG_ARG_MAYBE_UNUSED(decl) UNUSED (decl) |
| 428 | 190 |
| 613 | 191 #elif defined (WIN32_NATIVE) |
| 192 | |
| 193 /* MS Windows signal emulation (in turns emulates the sigset/sighold | |
| 194 paradigm) */ | |
| 195 | |
| 196 #define EMACS_SIGNAL mswindows_sigset | |
| 197 #define EMACS_BLOCK_SIGNAL(sig) mswindows_sighold (sig) | |
| 198 #define EMACS_UNBLOCK_SIGNAL(sig) mswindows_sigrelse (sig) | |
| 199 /* #### There's not really any simple way to implement this. | |
| 200 Since EMACS_UNBLOCK_ALL_SIGNALS() is only called once (at startup), | |
| 201 it's probably OK to just ignore it. */ | |
| 202 #define EMACS_UNBLOCK_ALL_SIGNALS() 0 | |
| 203 #define EMACS_WAIT_FOR_SIGNAL(sig) mswindows_sigpause (sig) | |
| 204 #define EMACS_REESTABLISH_SIGNAL(sig, handler) | |
| 2286 | 205 #define SIG_ARG_MAYBE_UNUSED(decl) UNUSED (decl) |
| 613 | 206 |
| 207 /* Defines that we need that aren't in the standard signal.h */ | |
| 208 #define SIGHUP 1 /* Hang up */ | |
| 209 #define SIGQUIT 3 /* Quit process */ | |
| 210 #define SIGKILL 9 /* Die, die die */ | |
| 211 #define SIGALRM 14 /* Alarm */ | |
| 212 #define SIGPROF 29 /* Profiling timer exp */ | |
| 213 | |
| 428 | 214 #else |
| 215 | |
| 216 /* The oldest SYSV way (signal only; unreliable signals) */ | |
| 217 | |
| 218 /* Old USG systems don't really have signal blocking. | |
| 219 We indicate this by not defining EMACS_BLOCK_SIGNAL or | |
| 220 EMACS_WAIT_FOR_SIGNAL. */ | |
| 613 | 221 #define EMACS_SIGNAL signal |
| 428 | 222 #define EMACS_UNBLOCK_SIGNAL(sig) 0 |
| 223 #define EMACS_UNBLOCK_ALL_SIGNALS() 0 | |
| 224 #define EMACS_REESTABLISH_SIGNAL(sig, handler) do \ | |
| 225 { \ | |
| 226 int old_errno = errno; \ | |
| 227 signal (sig, handler); \ | |
| 228 errno = old_errno; \ | |
| 229 } while (0) | |
| 2286 | 230 #define SIG_ARG_MAYBE_UNUSED(decl) decl |
| 428 | 231 |
| 232 /* Under SYSV, setting a signal handler for SIGCLD causes | |
| 233 SIGCLD to immediately be sent if there any unwaited processes | |
| 234 out there. This means that the SIGCLD handler *must* call | |
| 235 wait() to reap the status of all processes -- it cannot | |
| 236 simply set a flag and then reestablish the handler, because | |
| 237 it will get called again, infinitely. We only need to | |
| 238 worry about this on systems where signals need to be | |
| 239 reestablished (SYSV Release 2 and earlier). */ | |
| 240 #define OBNOXIOUS_SYSV_SIGCLD_BEHAVIOR | |
| 241 | |
| 613 | 242 #endif /* different signalling methods */ |
| 428 | 243 |
| 244 /* On bsd, [man says] kill does not accept a negative number to kill a pgrp. | |
| 245 Must do that using the killpg call. */ | |
| 442 | 246 #ifdef HAVE_KILLPG |
| 247 #define EMACS_KILLPG(pid, signo) killpg (pid, signo) | |
| 814 | 248 #elif defined (WIN32_NATIVE) |
| 249 #define EMACS_KILLPG(pid, signo) should never be called | |
| 428 | 250 #else |
| 442 | 251 #define EMACS_KILLPG(pid, signo) kill (-(pid), signo) |
| 428 | 252 #endif |
| 253 | |
| 254 #ifndef NSIG | |
| 978 | 255 # ifdef USG5_4 |
| 256 /* Some SVr4s don't define NSIG in sys/signal.h for ANSI environments; | |
| 257 * instead, there's a system variable _sys_nsig. Unfortunately, we need the | |
| 258 * constant to dimension an array. So wire in the appropriate value here. | |
| 259 */ | |
| 260 # define NSIG 32 | |
| 261 # else | |
| 262 # define NSIG (SIGUSR2+1) /* guess how many elements are in sys_siglist... */ | |
| 263 # endif | |
| 428 | 264 #endif |
| 265 | |
| 2651 | 266 /* HAVE_DECL_SYS_SIGLIST is determined by configure. On Linux, it seems, |
| 428 | 267 configure incorrectly fails to find it, so s/linux.h defines |
| 268 HAVE_SYS_SIGLIST. */ | |
| 2655 | 269 #if (!defined(HAVE_DECL_SYS_SIGLIST) || !HAVE_DECL_SYS_SIGLIST ) && !defined (HAVE_SYS_SIGLIST) |
| 442 | 270 extern const char *sys_siglist[]; |
| 428 | 271 #endif |
| 272 | |
| 273 #ifdef SIGDANGER | |
| 274 SIGTYPE memory_warning_signal (int sig); | |
| 275 #endif | |
| 276 | |
| 613 | 277 #if defined (WIN32_NATIVE) || defined (CYGWIN_BROKEN_SIGNALS) |
| 442 | 278 typedef void (__cdecl *mswindows_sighandler) (int); |
| 613 | 279 |
| 280 /* Prototypes for signal functions, see win32.c */ | |
| 442 | 281 int mswindows_sighold (int nsig); |
| 282 int mswindows_sigrelse (int nsig); | |
| 283 int mswindows_sigpause (int nsig); | |
| 284 int mswindows_raise (int nsig); | |
| 613 | 285 mswindows_sighandler mswindows_sigset (int sig, mswindows_sighandler handler); |
| 286 | |
| 287 #endif /* defined (WIN32_NATIVE) || defined (CYGWIN_BROKEN_SIGNALS) */ | |
| 288 | |
| 289 signal_handler_t set_timeout_signal (int signal_number, | |
| 290 signal_handler_t action); | |
| 291 | |
| 428 | 292 |
| 440 | 293 #endif /* INCLUDED_syssignal_h_ */ |