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/>. */
19 @PRAGMA_SYSTEM_HEADER@
22 #if defined __need_sig_atomic_t || defined __need_sigset_t
23 /* Special invocation convention inside glibc header files. */
25 # @INCLUDE_NEXT@ @NEXT_SIGNAL_H@
28 /* Normal invocation convention. */
32 /* The include_next requires a split double-inclusion guard. */
33 #@INCLUDE_NEXT@ @NEXT_SIGNAL_H@
38 /* The definition of GL_LINK_WARNING is copied here. */
40 /* Define pid_t, uid_t.
41 Also, mingw defines sigset_t not in <signal.h>, but in <sys/types.h>. */
42 #include <sys/types.h>
49 #if @GNULIB_SIGNAL_H_SIGPIPE@
51 /* Define SIGPIPE to a value that does not overlap with other signals. */
53 # define GNULIB_defined_SIGPIPE 1
54 /* To actually use SIGPIPE, you also need the gnulib modules 'sigprocmask',
60 #if !@HAVE_POSIX_SIGNALBLOCKING@
62 /* Maximum signal number + 1. */
67 /* This code supports only 32 signals. */
68 typedef int verify_NSIG_constraint[2 * (NSIG <= 32) - 1];
70 /* A set or mask of signals. */
72 typedef unsigned int sigset_t;
75 /* Test whether a given signal is contained in a signal set. */
76 extern int sigismember (const sigset_t *set, int sig);
78 /* Initialize a signal set to the empty set. */
79 extern int sigemptyset (sigset_t *set);
81 /* Add a signal to a signal set. */
82 extern int sigaddset (sigset_t *set, int sig);
84 /* Remove a signal from a signal set. */
85 extern int sigdelset (sigset_t *set, int sig);
87 /* Fill a signal set with all possible signals. */
88 extern int sigfillset (sigset_t *set);
90 /* Return the set of those blocked signals that are pending. */
91 extern int sigpending (sigset_t *set);
93 /* If OLD_SET is not NULL, put the current set of blocked signals in *OLD_SET.
94 Then, if SET is not NULL, affect the current set of blocked signals by
95 combining it with *SET as indicated in OPERATION.
96 In this implementation, you are not allowed to change a signal handler
97 while the signal is blocked. */
98 # define SIG_BLOCK 0 /* blocked_set = blocked_set | *set; */
99 # define SIG_SETMASK 1 /* blocked_set = *set; */
100 # define SIG_UNBLOCK 2 /* blocked_set = blocked_set & ~*set; */
101 extern int sigprocmask (int operation, const sigset_t *set, sigset_t *old_set);
103 # define signal rpl_signal
104 /* Install the handler FUNC for signal SIG, and return the previous
106 extern void (*signal (int sig, void (*func) (int))) (int);
108 # if GNULIB_defined_SIGPIPE
110 /* Raise signal SIG. */
112 # define raise rpl_raise
113 extern int raise (int sig);
117 #endif /* !@HAVE_POSIX_SIGNALBLOCKING@ */
120 #if !@HAVE_SIGACTION@
122 # if !@HAVE_SIGINFO_T@
123 /* Present to allow compilation, but unsupported by gnulib. */
130 /* Present to allow compilation, but unsupported by gnulib. */
141 union sigval si_value;
143 typedef struct siginfo_t siginfo_t;
144 # endif /* !@HAVE_SIGINFO_T@ */
146 /* We assume that platforms which lack the sigaction() function also lack
147 the 'struct sigaction' type, and vice versa. */
153 void (*_sa_handler) (int);
154 /* Present to allow compilation, but unsupported by gnulib. POSIX
155 says that implementations may, but not must, make sa_sigaction
156 overlap with sa_handler, but we know of no implementation where
157 they do not overlap. */
158 void (*_sa_sigaction) (int, siginfo_t *, void *);
161 /* Not all POSIX flags are supported. */
164 # define sa_handler _sa_func._sa_handler
165 # define sa_sigaction _sa_func._sa_sigaction
166 /* Unsupported flags are not present. */
167 # define SA_RESETHAND 1
168 # define SA_NODEFER 2
169 # define SA_RESTART 4
171 extern int sigaction (int, const struct sigaction *restrict,
172 struct sigaction *restrict);
174 #elif !@HAVE_STRUCT_SIGACTION_SA_SIGACTION@
176 # define sa_sigaction sa_handler
178 #endif /* !@HAVE_SIGACTION@, !@HAVE_STRUCT_SIGACTION_SA_SIGACTION@ */
181 /* Some systems don't have SA_NODEFER. */
183 # define SA_NODEFER 0
191 #endif /* _GL_SIGNAL_H */
192 #endif /* _GL_SIGNAL_H */