1 /* A GNU-like <signal.h>.
3 Copyright (C) 2006-2007 Free Software Foundation, Inc.
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2, or (at your option)
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software Foundation,
17 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
19 #if defined __need_sig_atomic_t || defined __need_sigset_t
20 /* Special invocation convention inside glibc header files. */
22 # if @HAVE_INCLUDE_NEXT@
23 # include_next <signal.h>
25 # include @ABSOLUTE_SIGNAL_H@
29 /* Normal invocation convention. */
34 #if @HAVE_INCLUDE_NEXT@
35 # include_next <signal.h>
37 # include @ABSOLUTE_SIGNAL_H@
40 /* The definition of GL_LINK_WARNING is copied here. */
48 #if !@HAVE_POSIX_SIGNALBLOCKING@
50 /* Mingw defines sigset_t not in <signal.h>, but in <sys/types.h>. */
51 # include <sys/types.h>
53 /* Maximum signal number + 1. */
58 /* This code supports only 32 signals. */
59 typedef int verify_NSIG_constraint[2 * (NSIG <= 32) - 1];
61 /* A set or mask of signals. */
63 typedef unsigned int sigset_t;
66 /* Test whether a given signal is contained in a signal set. */
67 extern int sigismember (const sigset_t *set, int sig);
69 /* Initialize a signal set to the empty set. */
70 extern int sigemptyset (sigset_t *set);
72 /* Add a signal to a signal set. */
73 extern int sigaddset (sigset_t *set, int sig);
75 /* Remove a signal from a signal set. */
76 extern int sigdelset (sigset_t *set, int sig);
78 /* Fill a signal set with all possible signals. */
79 extern int sigfillset (sigset_t *set);
81 /* Return the set of those blocked signals that are pending. */
82 extern int sigpending (sigset_t *set);
84 /* If OLD_SET is not NULL, put the current set of blocked signals in *OLD_SET.
85 Then, if SET is not NULL, affect the current set of blocked signals by
86 combining it with *SET as indicated in OPERATION.
87 In this implementation, you are not allowed to change a signal handler
88 while the signal is blocked. */
89 # define SIG_BLOCK 0 /* blocked_set = blocked_set | *set; */
90 # define SIG_SETMASK 1 /* blocked_set = *set; */
91 # define SIG_UNBLOCK 2 /* blocked_set = blocked_set & ~*set; */
92 extern int sigprocmask (int operation, const sigset_t *set, sigset_t *old_set);
101 #endif /* _GL_SIGNAL_H */