1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
|
/* syssignal.h - System-dependent definitions for signals.
Copyright (C) 1993 Free Software Foundation, Inc.
This file is part of GNU Emacs.
GNU Emacs 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 1, or (at your option)
any later version.
GNU Emacs 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 GNU Emacs; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
#ifdef POSIX_SIGNALS
/* Don't #include <signal.h>. That header should always be #included
before "config.h", because some configuration files (like s/hpux.h)
indicate that SIGIO doesn't work by #undef-ing SIGIO. If this file
#includes <signal.h>, then that will re-#define SIGIO and confuse
things. */
#define SIGMASKTYPE sigset_t
#define SIGEMPTYMASK (empty_mask)
#define SIGFULLMASK (full_mask)
extern sigset_t empty_mask, full_mask, temp_mask;
/* POSIX pretty much destroys any possibility of writing sigmask as a
macro in standard C. */
#ifndef sigmask
#ifdef __GNUC__
#define sigmask(SIG) \
({ \
sigset_t _mask; \
sigemptyset (&_mask); \
sigaddset (&_mask, SIG); \
_mask; \
})
#else /* ! defined (__GNUC__) */
extern sigset_t sys_sigmask ();
#define sigmask(SIG) (sys_sigmask (SIG))
#endif /* ! defined (__GNUC__) */
#endif
#define sigpause(SIG) sys_sigpause (SIG)
#define sigblock(SIG) sys_sigblock (SIG)
#define sigunblock(SIG) sys_sigunblock (SIG)
#define sigsetmask(SIG) sys_sigsetmask (SIG)
#define sighold(SIG) ONLY_USED_IN_BSD_4_1
#define sigrelse(SIG) ONLY_USED_IN_BSD_4_1
#define signal(SIG,ACT) sys_signal(SIG,ACT)
/* Whether this is what all systems want or not, this is what
appears to be assumed in the source, for example data.c:arith_error. */
typedef RETSIGTYPE (*signal_handler_t) (/*int*/);
signal_handler_t sys_signal (/*int signal_number, signal_handler_t action*/);
int sys_sigpause (/*sigset_t new_mask*/);
sigset_t sys_sigblock (/*sigset_t new_mask*/);
sigset_t sys_sigunblock (/*sigset_t new_mask*/);
sigset_t sys_sigsetmask (/*sigset_t new_mask*/);
#define sys_sigdel(MASK,SIG) sigdelset (&MASK,SIG)
#else /* ! defined (POSIX_SIGNALS) */
#ifdef USG5_4
#ifndef sigblock
#define sigblock(sig) (sigprocmask (SIG_BLOCK, SIGEMPTYMASK | sig, NULL))
#endif
#define sigunblock(sig) (sigprocmask (SIG_SETMASK, SIGFULLMASK & ~(sig), NULL))
#else
#ifdef USG
#define sigunblock(sig)
#else
#define sigunblock(SIG) \
{ SIGMASKTYPE omask = sigblock (SIGEMPTYMASK); sigsetmask (omask & ~SIG); }
#endif /* ! defined (USG) */
#endif /* ! defined (USG5_4) */
#endif /* ! defined (POSIX_SIGNALS) */
#ifndef SIGMASKTYPE
#define SIGMASKTYPE int
#endif
#ifndef SIGEMPTYMASK
#define SIGEMPTYMASK (0)
#endif
#ifndef SIGFULLMASK
#define SIGFULLMASK (0xffffffff)
#endif
#ifndef sigmask
#define sigmask(no) (1L << ((no) - 1))
#endif
#ifndef sigunblock
#define sigunblock(SIG) \
{ SIGMASKTYPE omask = sigblock (SIGFULLMASK); sigsetmask (omask & ~SIG); }
#endif
/* It would be very nice if we could somehow clean up all this trash. */
#ifndef BSD4_1
#define sigfree() sigsetmask (SIGEMPTYMASK)
#define sigholdx(sig) sigsetmask (sigmask (sig))
#define sigblockx(sig) sigblock (sigmask (sig))
#define sigunblockx(sig) sigblock (SIGEMPTYMASK)
#define sigpausex(sig) sigpause (0)
#endif /* BSD4_1 */
#ifdef BSD4_1
#define SIGIO SIGTINT
/* sigfree and sigholdx are in sysdep.c */
#define sigblockx(sig) sighold (sig)
#define sigunblockx(sig) sigrelse (sig)
#define sigpausex(sig) sigpause (sig)
#endif /* ! defined (BSD4_1) */
/* On bsd, [man says] kill does not accept a negative number to kill a pgrp.
Must do that using the killpg call. */
#ifdef BSD
#define EMACS_KILLPG(gid, signo) (killpg ( (gid), (signo)))
#else
#ifdef WINDOWSNT
#define EMACS_KILLPG(gid, signo) (win32_kill_process (gid, signo))
#else
#define EMACS_KILLPG(gid, signo) (kill (-(gid), (signo)))
#endif
#endif
/* Define SIGCHLD as an alias for SIGCLD. There are many conditionals
testing SIGCHLD. */
#ifndef VMS
#ifdef SIGCLD
#ifndef SIGCHLD
#define SIGCHLD SIGCLD
#endif /* SIGCHLD */
#endif /* ! defined (SIGCLD) */
#endif /* VMS */
|
