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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 | |
18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
20 | #ifdef POSIX_SIGNALS | |
00eaaa32 | 21 | |
c3aa5fec | 22 | /* Don't #include <signal.h>. That header should always be #included |
cf026b25 JB |
23 | before "config.h", because some configuration files (like s/hpux.h) |
24 | indicate that SIGIO doesn't work by #undef-ing SIGIO. If this file | |
25 | #includes <signal.h>, then that will re-#define SIGIO and confuse | |
26 | things. */ | |
00eaaa32 | 27 | |
9ab9afa9 JB |
28 | #define SIGMASKTYPE sigset_t |
29 | ||
30 | #define SIGEMPTYMASK (empty_mask) | |
31 | #define SIGFULLMASK (full_mask) | |
32 | extern sigset_t empty_mask, full_mask, temp_mask; | |
33 | ||
1b1f8f85 JB |
34 | /* POSIX pretty much destroys any possibility of writing sigmask as a |
35 | macro in standard C. */ | |
00eaaa32 | 36 | #ifndef sigmask |
1b1f8f85 JB |
37 | #ifdef __GNUC__ |
38 | #define sigmask(SIG) \ | |
39 | ({ \ | |
40 | sigset_t _mask; \ | |
41 | sigemptyset (&_mask); \ | |
42 | sigaddset (&_mask, SIG); \ | |
43 | _mask; \ | |
44 | }) | |
985a35a3 | 45 | #else /* ! defined (__GNUC__) */ |
9bd67a37 | 46 | extern sigset_t sys_sigmask (); |
1b1f8f85 | 47 | #define sigmask(SIG) (sys_sigmask (SIG)) |
985a35a3 | 48 | #endif /* ! defined (__GNUC__) */ |
00eaaa32 | 49 | #endif |
1b1f8f85 | 50 | |
69037d5a RS |
51 | #define sigpause(SIG) sys_sigpause (SIG) |
52 | #define sigblock(SIG) sys_sigblock (SIG) | |
53 | #define sigunblock(SIG) sys_sigunblock (SIG) | |
54 | #define sigsetmask(SIG) sys_sigsetmask (SIG) | |
9ab9afa9 JB |
55 | #define sighold(SIG) ONLY_USED_IN_BSD_4_1 |
56 | #define sigrelse(SIG) ONLY_USED_IN_BSD_4_1 | |
9c063f29 | 57 | #define signal(SIG,ACT) sys_signal(SIG,ACT) |
9ab9afa9 | 58 | |
00eaaa32 | 59 | /* Whether this is what all systems want or not, this is what |
69037d5a | 60 | appears to be assumed in the source, for example data.c:arith_error. */ |
667da7f5 | 61 | typedef RETSIGTYPE (*signal_handler_t) (/*int*/); |
00eaaa32 | 62 | |
667da7f5 KH |
63 | signal_handler_t sys_signal (/*int signal_number, signal_handler_t action*/); |
64 | int sys_sigpause (/*sigset_t new_mask*/); | |
65 | sigset_t sys_sigblock (/*sigset_t new_mask*/); | |
66 | sigset_t sys_sigunblock (/*sigset_t new_mask*/); | |
67 | sigset_t sys_sigsetmask (/*sigset_t new_mask*/); | |
9ab9afa9 | 68 | |
69037d5a | 69 | #define sys_sigdel(MASK,SIG) sigdelset (&MASK,SIG) |
9ab9afa9 | 70 | |
985a35a3 JB |
71 | #else /* ! defined (POSIX_SIGNALS) */ |
72 | #ifdef USG5_4 | |
73 | ||
69037d5a | 74 | #ifndef sigblock |
d8b3c190 | 75 | #define sigblock(sig) (sigprocmask (SIG_BLOCK, SIGEMPTYMASK | sig, NULL)) |
69037d5a RS |
76 | #endif |
77 | ||
78 | #define sigunblock(sig) (sigprocmask (SIG_SETMASK, SIGFULLMASK & ~(sig), NULL)) | |
985a35a3 JB |
79 | |
80 | #else | |
81 | #ifdef USG | |
82 | ||
83 | #define sigunblock(sig) | |
84 | ||
85 | #else | |
9ab9afa9 JB |
86 | |
87 | #define sigunblock(SIG) \ | |
88 | { SIGMASKTYPE omask = sigblock (SIGEMPTYMASK); sigsetmask (omask & ~SIG); } | |
89 | ||
985a35a3 JB |
90 | #endif /* ! defined (USG) */ |
91 | #endif /* ! defined (USG5_4) */ | |
92 | #endif /* ! defined (POSIX_SIGNALS) */ | |
9ab9afa9 JB |
93 | |
94 | #ifndef SIGMASKTYPE | |
95 | #define SIGMASKTYPE int | |
96 | #endif | |
97 | ||
98 | #ifndef SIGEMPTYMASK | |
1b1f8f85 JB |
99 | #define SIGEMPTYMASK (0) |
100 | #endif | |
101 | ||
102 | #ifndef SIGFULLMASK | |
103 | #define SIGFULLMASK (0xffffffff) | |
9ab9afa9 JB |
104 | #endif |
105 | ||
106 | #ifndef sigmask | |
107 | #define sigmask(no) (1L << ((no) - 1)) | |
108 | #endif | |
109 | ||
1b1f8f85 JB |
110 | #ifndef sigunblock |
111 | #define sigunblock(SIG) \ | |
112 | { SIGMASKTYPE omask = sigblock (SIGFULLMASK); sigsetmask (omask & ~SIG); } | |
113 | #endif | |
114 | ||
115 | /* It would be very nice if we could somehow clean up all this trash. */ | |
116 | ||
117 | #ifndef BSD4_1 | |
118 | #define sigfree() sigsetmask (SIGEMPTYMASK) | |
119 | #define sigholdx(sig) sigsetmask (sigmask (sig)) | |
120 | #define sigblockx(sig) sigblock (sigmask (sig)) | |
121 | #define sigunblockx(sig) sigblock (SIGEMPTYMASK) | |
122 | #define sigpausex(sig) sigpause (0) | |
985a35a3 | 123 | #endif /* BSD4_1 */ |
1b1f8f85 | 124 | |
9ab9afa9 JB |
125 | #ifdef BSD4_1 |
126 | #define SIGIO SIGTINT | |
127 | /* sigfree and sigholdx are in sysdep.c */ | |
1b1f8f85 JB |
128 | #define sigblockx(sig) sighold (sig) |
129 | #define sigunblockx(sig) sigrelse (sig) | |
130 | #define sigpausex(sig) sigpause (sig) | |
985a35a3 | 131 | #endif /* ! defined (BSD4_1) */ |
9ab9afa9 JB |
132 | |
133 | /* On bsd, [man says] kill does not accept a negative number to kill a pgrp. | |
134 | Must do that using the killpg call. */ | |
135 | #ifdef BSD | |
136 | #define EMACS_KILLPG(gid, signo) (killpg ( (gid), (signo))) | |
137 | #else | |
57d65592 RS |
138 | #ifdef WINDOWSNT |
139 | #define EMACS_KILLPG(gid, signo) (win32_kill_process (gid, signo)) | |
140 | #else | |
9ab9afa9 JB |
141 | #define EMACS_KILLPG(gid, signo) (kill (-(gid), (signo))) |
142 | #endif | |
57d65592 | 143 | #endif |
9ab9afa9 JB |
144 | |
145 | /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals | |
146 | testing SIGCHLD. */ | |
9ab9afa9 JB |
147 | #ifndef VMS |
148 | #ifdef SIGCLD | |
149 | #ifndef SIGCHLD | |
150 | #define SIGCHLD SIGCLD | |
985a35a3 JB |
151 | #endif /* SIGCHLD */ |
152 | #endif /* ! defined (SIGCLD) */ | |
153 | #endif /* VMS */ |