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
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
|
/* syssignal.h - System-dependent definitions for signals.
Copyright (C) 1993, 1999, 2001, 2002, 2003, 2004,
2005, 2006, 2007 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 3, 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, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA. */
extern void init_signals P_ ((void));
#ifdef HAVE_GTK_AND_PTHREAD
#include <pthread.h>
extern pthread_t main_thread;
#endif
#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. */
/* XXX This is not correct anymore, there is a BROKEN_SIGIO macro. */
#define SIGMASKTYPE sigset_t
#define SIGEMPTYMASK (empty_mask)
#define SIGFULLMASK (full_mask)
extern sigset_t empty_mask, full_mask;
/* POSIX pretty much destroys any possibility of writing sigmask as a
macro in standard C. We always define our own version because the
predefined macro in Glibc 2.1 is only provided for compatility for old
programs that use int as signal mask type. */
#undef 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__) */
#undef sigpause
#define sigpause(MASK) sigsuspend (&(MASK))
#define sigblock(SIG) sys_sigblock (SIG)
#define sigunblock(SIG) sys_sigunblock (SIG)
#ifndef sigsetmask
#define sigsetmask(SIG) sys_sigsetmask (SIG)
#endif
#define sighold(SIG) ONLY_USED_IN_BSD_4_1
#define sigrelse(SIG) ONLY_USED_IN_BSD_4_1
#undef signal
#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 P_ ((int signal_number, signal_handler_t action));
sigset_t sys_sigblock P_ ((sigset_t new_mask));
sigset_t sys_sigunblock P_ ((sigset_t new_mask));
sigset_t sys_sigsetmask P_ ((sigset_t new_mask));
#define sys_sigdel(MASK,SIG) sigdelset (&MASK,SIG)
#else /* ! defined (POSIX_SIGNALS) */
#ifdef USG5_4
extern SIGMASKTYPE sigprocmask_set;
#ifndef sigblock
#define sigblock(sig) \
(sigprocmask_set = SIGEMPTYMASK | (sig), \
sigprocmask (SIG_BLOCK, &sigprocmask_set, NULL))
#endif
#ifndef sigunblock
#define sigunblock(sig) \
(sigprocmask_set = SIGFULLMASK & ~(sig), \
sigprocmask (SIG_SETMASK, &sigprocmask_set, NULL))
#endif
#else
#ifdef USG
#ifndef sigunblock
#define sigunblock(sig)
#endif
#else
#ifndef sigunblock
#define sigunblock(SIG) \
{ SIGMASKTYPE omask = sigblock (SIGEMPTYMASK); sigsetmask (omask & ~SIG); }
#endif
#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
#ifndef BSD4_1
#define sigfree() sigsetmask (SIGEMPTYMASK)
#endif /* not BSD4_1 */
#if defined (SIGINFO) && defined (BROKEN_SIGINFO)
#undef SIGINFO
#endif
#if defined (SIGIO) && defined (BROKEN_SIGIO)
# undef SIGIO
# if defined (__Lynx__)
# undef SIGPOLL /* Defined as SIGIO on LynxOS */
# endif
#endif
#if defined (SIGPOLL) && defined (BROKEN_SIGPOLL)
#undef SIGPOLL
#endif
#if defined (SIGTSTP) && defined (BROKEN_SIGTSTP)
#undef SIGTSTP
#endif
#if defined (SIGURG) && defined (BROKEN_SIGURG)
#undef SIGURG
#endif
#if defined (SIGAIO) && defined (BROKEN_SIGAIO)
#undef SIGAIO
#endif
#if defined (SIGPTY) && defined (BROKEN_SIGPTY)
#undef SIGPTY
#endif
#if NSIG < NSIG_MINIMUM
# ifdef NSIG
# undef NSIG
# endif
# define NSIG NSIG_MINIMUM
#endif
#ifdef BSD4_1
#define SIGIO SIGTINT
/* sigfree is in sysdep.c */
#endif /* 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_SYSTEM
#define EMACS_KILLPG(gid, signo) (killpg ( (gid), (signo)))
#else
#ifdef WINDOWSNT
#define EMACS_KILLPG(gid, signo) (kill (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 */
#ifndef HAVE_STRSIGNAL
/* strsignal is in sysdep.c */
char *strsignal ();
#endif
#ifdef HAVE_GTK_AND_PTHREAD
#define SIGNAL_THREAD_CHECK(signo) \
do { \
if (!pthread_equal (pthread_self (), main_thread)) \
{ \
/* POSIX says any thread can receive the signal. On GNU/Linux \
that is not true, but for other systems (FreeBSD at least) \
it is. So direct the signal to the correct thread and block \
it from this thread. */ \
sigset_t new_mask; \
\
sigemptyset (&new_mask); \
sigaddset (&new_mask, signo); \
pthread_sigmask (SIG_BLOCK, &new_mask, 0); \
pthread_kill (main_thread, signo); \
return; \
} \
} while (0)
#else /* not HAVE_GTK_AND_PTHREAD */
#define SIGNAL_THREAD_CHECK(signo)
#endif /* not HAVE_GTK_AND_PTHREAD */
/* arch-tag: 4580e86a-340d-4574-9e11-a742b6e1a152
(do not change this comment) */
|
