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9ab9afa9 | 1 | /* syssignal.h - System-dependent definitions for signals. |
c6c5df7f | 2 | Copyright (C) 1993 Free Software Foundation, Inc. |
9ab9afa9 JB |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
6 | GNU Emacs is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
7c938215 | 8 | the Free Software Foundation; either version 2, or (at your option) |
9ab9afa9 JB |
9 | any later version. |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
18 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
19 | Boston, MA 02111-1307, USA. */ | |
9ab9afa9 JB |
20 | |
21 | #ifdef POSIX_SIGNALS | |
00eaaa32 | 22 | |
c3aa5fec | 23 | /* Don't #include <signal.h>. That header should always be #included |
cf026b25 JB |
24 | before "config.h", because some configuration files (like s/hpux.h) |
25 | indicate that SIGIO doesn't work by #undef-ing SIGIO. If this file | |
26 | #includes <signal.h>, then that will re-#define SIGIO and confuse | |
27 | things. */ | |
00eaaa32 | 28 | |
9ab9afa9 JB |
29 | #define SIGMASKTYPE sigset_t |
30 | ||
31 | #define SIGEMPTYMASK (empty_mask) | |
32 | #define SIGFULLMASK (full_mask) | |
33 | extern sigset_t empty_mask, full_mask, temp_mask; | |
34 | ||
1b1f8f85 JB |
35 | /* POSIX pretty much destroys any possibility of writing sigmask as a |
36 | macro in standard C. */ | |
00eaaa32 | 37 | #ifndef sigmask |
1b1f8f85 JB |
38 | #ifdef __GNUC__ |
39 | #define sigmask(SIG) \ | |
40 | ({ \ | |
41 | sigset_t _mask; \ | |
42 | sigemptyset (&_mask); \ | |
43 | sigaddset (&_mask, SIG); \ | |
44 | _mask; \ | |
45 | }) | |
985a35a3 | 46 | #else /* ! defined (__GNUC__) */ |
9bd67a37 | 47 | extern sigset_t sys_sigmask (); |
1b1f8f85 | 48 | #define sigmask(SIG) (sys_sigmask (SIG)) |
985a35a3 | 49 | #endif /* ! defined (__GNUC__) */ |
00eaaa32 | 50 | #endif |
1b1f8f85 | 51 | |
6befe105 | 52 | #ifndef sigpause |
69037d5a | 53 | #define sigpause(SIG) sys_sigpause (SIG) |
9f910b50 RS |
54 | #else |
55 | /* If sigpause is predefined, with POSIX_SIGNALS, | |
56 | let's assume it needs this kind of argument. | |
57 | This is true for Glibc 2.1. */ | |
58 | #undef SIGEMPTYMASK | |
59 | #define SIGEMPTYMASK sigmask (0) | |
6befe105 | 60 | #endif |
9f910b50 | 61 | |
69037d5a RS |
62 | #define sigblock(SIG) sys_sigblock (SIG) |
63 | #define sigunblock(SIG) sys_sigunblock (SIG) | |
cc210d67 | 64 | #ifndef sigsetmask |
69037d5a | 65 | #define sigsetmask(SIG) sys_sigsetmask (SIG) |
cc210d67 | 66 | #endif |
9ab9afa9 JB |
67 | #define sighold(SIG) ONLY_USED_IN_BSD_4_1 |
68 | #define sigrelse(SIG) ONLY_USED_IN_BSD_4_1 | |
6c8a1e24 | 69 | #undef signal |
9c063f29 | 70 | #define signal(SIG,ACT) sys_signal(SIG,ACT) |
9ab9afa9 | 71 | |
00eaaa32 | 72 | /* Whether this is what all systems want or not, this is what |
69037d5a | 73 | appears to be assumed in the source, for example data.c:arith_error. */ |
667da7f5 | 74 | typedef RETSIGTYPE (*signal_handler_t) (/*int*/); |
00eaaa32 | 75 | |
667da7f5 KH |
76 | signal_handler_t sys_signal (/*int signal_number, signal_handler_t action*/); |
77 | int sys_sigpause (/*sigset_t new_mask*/); | |
78 | sigset_t sys_sigblock (/*sigset_t new_mask*/); | |
79 | sigset_t sys_sigunblock (/*sigset_t new_mask*/); | |
80 | sigset_t sys_sigsetmask (/*sigset_t new_mask*/); | |
9ab9afa9 | 81 | |
69037d5a | 82 | #define sys_sigdel(MASK,SIG) sigdelset (&MASK,SIG) |
9ab9afa9 | 83 | |
985a35a3 JB |
84 | #else /* ! defined (POSIX_SIGNALS) */ |
85 | #ifdef USG5_4 | |
86 | ||
69037d5a | 87 | #ifndef sigblock |
d8b3c190 | 88 | #define sigblock(sig) (sigprocmask (SIG_BLOCK, SIGEMPTYMASK | sig, NULL)) |
69037d5a RS |
89 | #endif |
90 | ||
91 | #define sigunblock(sig) (sigprocmask (SIG_SETMASK, SIGFULLMASK & ~(sig), NULL)) | |
985a35a3 JB |
92 | |
93 | #else | |
94 | #ifdef USG | |
95 | ||
96 | #define sigunblock(sig) | |
97 | ||
98 | #else | |
9ab9afa9 JB |
99 | |
100 | #define sigunblock(SIG) \ | |
101 | { SIGMASKTYPE omask = sigblock (SIGEMPTYMASK); sigsetmask (omask & ~SIG); } | |
102 | ||
985a35a3 JB |
103 | #endif /* ! defined (USG) */ |
104 | #endif /* ! defined (USG5_4) */ | |
105 | #endif /* ! defined (POSIX_SIGNALS) */ | |
9ab9afa9 JB |
106 | |
107 | #ifndef SIGMASKTYPE | |
108 | #define SIGMASKTYPE int | |
109 | #endif | |
110 | ||
111 | #ifndef SIGEMPTYMASK | |
1b1f8f85 JB |
112 | #define SIGEMPTYMASK (0) |
113 | #endif | |
114 | ||
115 | #ifndef SIGFULLMASK | |
116 | #define SIGFULLMASK (0xffffffff) | |
9ab9afa9 JB |
117 | #endif |
118 | ||
119 | #ifndef sigmask | |
120 | #define sigmask(no) (1L << ((no) - 1)) | |
121 | #endif | |
122 | ||
1b1f8f85 JB |
123 | #ifndef sigunblock |
124 | #define sigunblock(SIG) \ | |
125 | { SIGMASKTYPE omask = sigblock (SIGFULLMASK); sigsetmask (omask & ~SIG); } | |
126 | #endif | |
127 | ||
1b1f8f85 JB |
128 | #ifndef BSD4_1 |
129 | #define sigfree() sigsetmask (SIGEMPTYMASK) | |
ea973b10 | 130 | #endif /* not BSD4_1 */ |
1b1f8f85 | 131 | |
9ab9afa9 JB |
132 | #ifdef BSD4_1 |
133 | #define SIGIO SIGTINT | |
645280b7 | 134 | /* sigfree is in sysdep.c */ |
ea973b10 | 135 | #endif /* BSD4_1 */ |
9ab9afa9 JB |
136 | |
137 | /* On bsd, [man says] kill does not accept a negative number to kill a pgrp. | |
138 | Must do that using the killpg call. */ | |
6df54671 | 139 | #ifdef BSD_SYSTEM |
9ab9afa9 JB |
140 | #define EMACS_KILLPG(gid, signo) (killpg ( (gid), (signo))) |
141 | #else | |
57d65592 | 142 | #ifdef WINDOWSNT |
f405affb | 143 | #define EMACS_KILLPG(gid, signo) (kill (gid, signo)) |
57d65592 | 144 | #else |
9ab9afa9 JB |
145 | #define EMACS_KILLPG(gid, signo) (kill (-(gid), (signo))) |
146 | #endif | |
57d65592 | 147 | #endif |
9ab9afa9 JB |
148 | |
149 | /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals | |
150 | testing SIGCHLD. */ | |
9ab9afa9 JB |
151 | #ifndef VMS |
152 | #ifdef SIGCLD | |
153 | #ifndef SIGCHLD | |
154 | #define SIGCHLD SIGCLD | |
985a35a3 JB |
155 | #endif /* SIGCHLD */ |
156 | #endif /* ! defined (SIGCLD) */ | |
157 | #endif /* VMS */ |