1 /* A GNU-like <signal.h>.
3 Copyright (C) 2006-2008 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 3 of the License, or
8 (at your option) any later version.
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, see <http://www.gnu.org/licenses/>. */
18 #if defined __need_sig_atomic_t || defined __need_sigset_t
19 /* Special invocation convention inside glibc header files. */
21 # @INCLUDE_NEXT@ @NEXT_SIGNAL_H@
24 /* Normal invocation convention. */
28 /* The include_next requires a split double-inclusion guard. */
29 #@INCLUDE_NEXT@ @NEXT_SIGNAL_H@
34 /* The definition of GL_LINK_WARNING is copied here. */
36 /* Define pid_t, uid_t.
37 Also, mingw defines sigset_t not in <signal.h>, but in <sys/types.h>. */
38 #include <sys/types.h>
45 #if !@HAVE_POSIX_SIGNALBLOCKING@
47 /* Maximum signal number + 1. */
52 /* This code supports only 32 signals. */
53 typedef int verify_NSIG_constraint[2 * (NSIG <= 32) - 1];
55 /* A set or mask of signals. */
57 typedef unsigned int sigset_t;
60 /* Test whether a given signal is contained in a signal set. */
61 extern int sigismember (const sigset_t *set, int sig);
63 /* Initialize a signal set to the empty set. */
64 extern int sigemptyset (sigset_t *set);
66 /* Add a signal to a signal set. */
67 extern int sigaddset (sigset_t *set, int sig);
69 /* Remove a signal from a signal set. */
70 extern int sigdelset (sigset_t *set, int sig);
72 /* Fill a signal set with all possible signals. */
73 extern int sigfillset (sigset_t *set);
75 /* Return the set of those blocked signals that are pending. */
76 extern int sigpending (sigset_t *set);
78 /* If OLD_SET is not NULL, put the current set of blocked signals in *OLD_SET.
79 Then, if SET is not NULL, affect the current set of blocked signals by
80 combining it with *SET as indicated in OPERATION.
81 In this implementation, you are not allowed to change a signal handler
82 while the signal is blocked. */
83 # define SIG_BLOCK 0 /* blocked_set = blocked_set | *set; */
84 # define SIG_SETMASK 1 /* blocked_set = *set; */
85 # define SIG_UNBLOCK 2 /* blocked_set = blocked_set & ~*set; */
86 extern int sigprocmask (int operation, const sigset_t *set, sigset_t *old_set);
88 # define signal rpl_signal
89 /* Install the handler FUNC for signal SIG, and return the previous
91 extern void (*signal (int sig, void (*func) (int))) (int);
93 #endif /* !@HAVE_POSIX_SIGNALBLOCKING@ */
97 # if !@HAVE_SIGINFO_T@
98 /* Present to allow compilation, but unsupported by gnulib. */
105 /* Present to allow compilation, but unsupported by gnulib. */
116 union sigval si_value;
118 typedef struct siginfo_t siginfo_t;
119 # endif /* !@HAVE_SIGINFO_T@ */
121 /* We assume that platforms which lack the sigaction() function also lack
122 the 'struct sigaction' type, and vice versa. */
128 void (*_sa_handler) (int);
129 /* Present to allow compilation, but unsupported by gnulib. POSIX
130 says that implementations may, but not must, make sa_sigaction
131 overlap with sa_handler, but we know of no implementation where
132 they do not overlap. */
133 void (*_sa_sigaction) (int, siginfo_t *, void *);
136 /* Not all POSIX flags are supported. */
139 # define sa_handler _sa_func._sa_handler
140 # define sa_sigaction _sa_func._sa_sigaction
141 /* Unsupported flags are not present. */
142 # define SA_RESETHAND 1
143 # define SA_NODEFER 2
144 # define SA_RESTART 4
146 extern int sigaction (int, const struct sigaction *restrict,
147 struct sigaction *restrict);
149 #elif !@HAVE_STRUCT_SIGACTION_SA_SIGACTION@
151 # define sa_sigaction sa_handler
153 #endif /* !@HAVE_SIGACTION@, !@HAVE_STRUCT_SIGACTION_SA_SIGACTION@ */
160 #endif /* _GL_SIGNAL_H */
161 #endif /* _GL_SIGNAL_H */