1 /* syssignal.h - System-dependent definitions for signals.
3 Copyright (C) 1993, 1999, 2001-2012 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software: you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation, either version 3 of the License, or
10 (at your option) any later version.
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
22 extern void init_signals (void);
26 /* If defined, asynchronous signals delivered to a non-main thread are
27 forwarded to the main thread. */
28 #define FORWARD_SIGNAL_TO_MAIN_THREAD
31 extern sigset_t empty_mask
;
33 typedef void (*signal_handler_t
) (int);
35 extern void emacs_sigaction_init (struct sigaction
*, signal_handler_t
);
37 #if ! (defined TIOCNOTTY || defined USG5 || defined CYGWIN)
38 _Noreturn
void croak (char *);
41 #if defined (SIGIO) && defined (BROKEN_SIGIO)
44 /* These are only used by AIX */
45 #if defined (SIGPOLL) && defined (BROKEN_SIGPOLL)
48 #if defined (SIGAIO) && defined (BROKEN_SIGAIO)
51 #if defined (SIGPTY) && defined (BROKEN_SIGPTY)
55 #if NSIG < NSIG_MINIMUM
57 # define NSIG NSIG_MINIMUM
60 /* On bsd, [man says] kill does not accept a negative number to kill a pgrp.
61 Must do that using the killpg call. */
63 #define EMACS_KILLPG(gid, signo) (killpg ( (gid), (signo)))
66 #define EMACS_KILLPG(gid, signo) (kill (gid, signo))
68 #define EMACS_KILLPG(gid, signo) (kill (-(gid), (signo)))
72 /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals
76 #define SIGCHLD SIGCLD
78 #endif /* ! defined (SIGCLD) */
80 #ifndef HAVE_STRSIGNAL
81 /* strsignal is in sysdep.c */
82 char *strsignal (int);
85 #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
86 extern pthread_t main_thread
;
89 void handle_on_main_thread (int, signal_handler_t
);