/* A GNU-like <signal.h>.
- Copyright (C) 2006-2010 Free Software Foundation, Inc.
+ Copyright (C) 2006-2014 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
#if __GNUC__ >= 3
@PRAGMA_SYSTEM_HEADER@
#endif
-
-#if defined __need_sig_atomic_t || defined __need_sigset_t
-/* Special invocation convention inside glibc header files. */
+@PRAGMA_COLUMNS@
+
+#if defined __need_sig_atomic_t || defined __need_sigset_t || defined _GL_ALREADY_INCLUDING_SIGNAL_H || (defined _SIGNAL_H && !defined __SIZEOF_PTHREAD_MUTEX_T)
+/* Special invocation convention:
+ - Inside glibc header files.
+ - On glibc systems we have a sequence of nested includes
+ <signal.h> -> <ucontext.h> -> <signal.h>.
+ In this situation, the functions are not yet declared, therefore we cannot
+ provide the C++ aliases.
+ - On glibc systems with GCC 4.3 we have a sequence of nested includes
+ <csignal> -> </usr/include/signal.h> -> <sys/ucontext.h> -> <signal.h>.
+ In this situation, some of the functions are not yet declared, therefore
+ we cannot provide the C++ aliases. */
# @INCLUDE_NEXT@ @NEXT_SIGNAL_H@
#else
/* Normal invocation convention. */
-#ifndef _GL_SIGNAL_H
+#ifndef _@GUARD_PREFIX@_SIGNAL_H
+
+#define _GL_ALREADY_INCLUDING_SIGNAL_H
+
+/* Define pid_t, uid_t.
+ Also, mingw defines sigset_t not in <signal.h>, but in <sys/types.h>.
+ On Solaris 10, <signal.h> includes <sys/types.h>, which eventually includes
+ us; so include <sys/types.h> now, before the second inclusion guard. */
+#include <sys/types.h>
/* The include_next requires a split double-inclusion guard. */
#@INCLUDE_NEXT@ @NEXT_SIGNAL_H@
-#ifndef _GL_SIGNAL_H
-#define _GL_SIGNAL_H
+#undef _GL_ALREADY_INCLUDING_SIGNAL_H
+
+#ifndef _@GUARD_PREFIX@_SIGNAL_H
+#define _@GUARD_PREFIX@_SIGNAL_H
-/* The definition of GL_LINK_WARNING is copied here. */
+/* Mac OS X 10.3, FreeBSD 6.4, OpenBSD 3.8, OSF/1 4.0, Solaris 2.6 declare
+ pthread_sigmask in <pthread.h>, not in <signal.h>.
+ But avoid namespace pollution on glibc systems.*/
+#if (@GNULIB_PTHREAD_SIGMASK@ || defined GNULIB_POSIXCHECK) \
+ && ((defined __APPLE__ && defined __MACH__) || defined __FreeBSD__ || defined __OpenBSD__ || defined __osf__ || defined __sun) \
+ && ! defined __GLIBC__
+# include <pthread.h>
+#endif
+
+/* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */
/* The definition of _GL_ARG_NONNULL is copied here. */
-/* Define pid_t, uid_t.
- Also, mingw defines sigset_t not in <signal.h>, but in <sys/types.h>. */
-#include <sys/types.h>
+/* The definition of _GL_WARN_ON_USE is copied here. */
/* On AIX, sig_atomic_t already includes volatile. C99 requires that
'volatile sig_atomic_t' ignore the extra modifier, but C89 did not.
Hence, redefine this to a non-volatile type as needed. */
#if ! @HAVE_TYPE_VOLATILE_SIG_ATOMIC_T@
+# if !GNULIB_defined_sig_atomic_t
typedef int rpl_sig_atomic_t;
-# undef sig_atomic_t
-# define sig_atomic_t rpl_sig_atomic_t
+# undef sig_atomic_t
+# define sig_atomic_t rpl_sig_atomic_t
+# define GNULIB_defined_sig_atomic_t 1
+# endif
#endif
/* A set or mask of signals. */
#if !@HAVE_SIGSET_T@
+# if !GNULIB_defined_sigset_t
typedef unsigned int sigset_t;
+# define GNULIB_defined_sigset_t 1
+# endif
#endif
-#ifdef __cplusplus
+/* Define sighandler_t, the type of signal handlers. A GNU extension. */
+#if !@HAVE_SIGHANDLER_T@
+# ifdef __cplusplus
extern "C" {
+# endif
+# if !GNULIB_defined_sighandler_t
+typedef void (*sighandler_t) (int);
+# define GNULIB_defined_sighandler_t 1
+# endif
+# ifdef __cplusplus
+}
+# endif
#endif
#endif
+/* Maximum signal number + 1. */
+#ifndef NSIG
+# if defined __TANDEM
+# define NSIG 32
+# endif
+#endif
+
+
+#if @GNULIB_PTHREAD_SIGMASK@
+# if @REPLACE_PTHREAD_SIGMASK@
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# undef pthread_sigmask
+# define pthread_sigmask rpl_pthread_sigmask
+# endif
+_GL_FUNCDECL_RPL (pthread_sigmask, int,
+ (int how, const sigset_t *new_mask, sigset_t *old_mask));
+_GL_CXXALIAS_RPL (pthread_sigmask, int,
+ (int how, const sigset_t *new_mask, sigset_t *old_mask));
+# else
+# if !@HAVE_PTHREAD_SIGMASK@
+_GL_FUNCDECL_SYS (pthread_sigmask, int,
+ (int how, const sigset_t *new_mask, sigset_t *old_mask));
+# endif
+_GL_CXXALIAS_SYS (pthread_sigmask, int,
+ (int how, const sigset_t *new_mask, sigset_t *old_mask));
+# endif
+_GL_CXXALIASWARN (pthread_sigmask);
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_sigmask
+# if HAVE_RAW_DECL_PTHREAD_SIGMASK
+_GL_WARN_ON_USE (pthread_sigmask, "pthread_sigmask is not portable - "
+ "use gnulib module pthread_sigmask for portability");
+# endif
+#endif
+
+
+#if @GNULIB_RAISE@
+# if @REPLACE_RAISE@
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# undef raise
+# define raise rpl_raise
+# endif
+_GL_FUNCDECL_RPL (raise, int, (int sig));
+_GL_CXXALIAS_RPL (raise, int, (int sig));
+# else
+# if !@HAVE_RAISE@
+_GL_FUNCDECL_SYS (raise, int, (int sig));
+# endif
+_GL_CXXALIAS_SYS (raise, int, (int sig));
+# endif
+_GL_CXXALIASWARN (raise);
+#elif defined GNULIB_POSIXCHECK
+# undef raise
+/* Assume raise is always declared. */
+_GL_WARN_ON_USE (raise, "raise can crash on native Windows - "
+ "use gnulib module raise for portability");
+#endif
+
+
#if @GNULIB_SIGPROCMASK@
# if !@HAVE_POSIX_SIGNALBLOCKING@
+# ifndef GNULIB_defined_signal_blocking
+# define GNULIB_defined_signal_blocking 1
+# endif
+
/* Maximum signal number + 1. */
# ifndef NSIG
# define NSIG 32
# endif
/* This code supports only 32 signals. */
-typedef int verify_NSIG_constraint[2 * (NSIG <= 32) - 1];
+# if !GNULIB_defined_verify_NSIG_constraint
+typedef int verify_NSIG_constraint[NSIG <= 32 ? 1 : -1];
+# define GNULIB_defined_verify_NSIG_constraint 1
+# endif
+
+# endif
+
+/* When also using extern inline, suppress the use of static inline in
+ standard headers of problematic Apple configurations, as Libc at
+ least through Libc-825.26 (2013-04-09) mishandles it; see, e.g.,
+ <http://lists.gnu.org/archive/html/bug-gnulib/2012-12/msg00023.html>.
+ Perhaps Apple will fix this some day. */
+#if (defined _GL_EXTERN_INLINE_IN_USE && defined __APPLE__ \
+ && (defined __i386__ || defined __x86_64__))
+# undef sigaddset
+# undef sigdelset
+# undef sigemptyset
+# undef sigfillset
+# undef sigismember
+#endif
/* Test whether a given signal is contained in a signal set. */
-extern int sigismember (const sigset_t *set, int sig) _GL_ARG_NONNULL ((1));
+# if @HAVE_POSIX_SIGNALBLOCKING@
+/* This function is defined as a macro on Mac OS X. */
+# if defined __cplusplus && defined GNULIB_NAMESPACE
+# undef sigismember
+# endif
+# else
+_GL_FUNCDECL_SYS (sigismember, int, (const sigset_t *set, int sig)
+ _GL_ARG_NONNULL ((1)));
+# endif
+_GL_CXXALIAS_SYS (sigismember, int, (const sigset_t *set, int sig));
+_GL_CXXALIASWARN (sigismember);
/* Initialize a signal set to the empty set. */
-extern int sigemptyset (sigset_t *set) _GL_ARG_NONNULL ((1));
+# if @HAVE_POSIX_SIGNALBLOCKING@
+/* This function is defined as a macro on Mac OS X. */
+# if defined __cplusplus && defined GNULIB_NAMESPACE
+# undef sigemptyset
+# endif
+# else
+_GL_FUNCDECL_SYS (sigemptyset, int, (sigset_t *set) _GL_ARG_NONNULL ((1)));
+# endif
+_GL_CXXALIAS_SYS (sigemptyset, int, (sigset_t *set));
+_GL_CXXALIASWARN (sigemptyset);
/* Add a signal to a signal set. */
-extern int sigaddset (sigset_t *set, int sig) _GL_ARG_NONNULL ((1));
+# if @HAVE_POSIX_SIGNALBLOCKING@
+/* This function is defined as a macro on Mac OS X. */
+# if defined __cplusplus && defined GNULIB_NAMESPACE
+# undef sigaddset
+# endif
+# else
+_GL_FUNCDECL_SYS (sigaddset, int, (sigset_t *set, int sig)
+ _GL_ARG_NONNULL ((1)));
+# endif
+_GL_CXXALIAS_SYS (sigaddset, int, (sigset_t *set, int sig));
+_GL_CXXALIASWARN (sigaddset);
/* Remove a signal from a signal set. */
-extern int sigdelset (sigset_t *set, int sig) _GL_ARG_NONNULL ((1));
+# if @HAVE_POSIX_SIGNALBLOCKING@
+/* This function is defined as a macro on Mac OS X. */
+# if defined __cplusplus && defined GNULIB_NAMESPACE
+# undef sigdelset
+# endif
+# else
+_GL_FUNCDECL_SYS (sigdelset, int, (sigset_t *set, int sig)
+ _GL_ARG_NONNULL ((1)));
+# endif
+_GL_CXXALIAS_SYS (sigdelset, int, (sigset_t *set, int sig));
+_GL_CXXALIASWARN (sigdelset);
/* Fill a signal set with all possible signals. */
-extern int sigfillset (sigset_t *set) _GL_ARG_NONNULL ((1));
+# if @HAVE_POSIX_SIGNALBLOCKING@
+/* This function is defined as a macro on Mac OS X. */
+# if defined __cplusplus && defined GNULIB_NAMESPACE
+# undef sigfillset
+# endif
+# else
+_GL_FUNCDECL_SYS (sigfillset, int, (sigset_t *set) _GL_ARG_NONNULL ((1)));
+# endif
+_GL_CXXALIAS_SYS (sigfillset, int, (sigset_t *set));
+_GL_CXXALIASWARN (sigfillset);
/* Return the set of those blocked signals that are pending. */
-extern int sigpending (sigset_t *set) _GL_ARG_NONNULL ((1));
+# if !@HAVE_POSIX_SIGNALBLOCKING@
+_GL_FUNCDECL_SYS (sigpending, int, (sigset_t *set) _GL_ARG_NONNULL ((1)));
+# endif
+_GL_CXXALIAS_SYS (sigpending, int, (sigset_t *set));
+_GL_CXXALIASWARN (sigpending);
/* If OLD_SET is not NULL, put the current set of blocked signals in *OLD_SET.
Then, if SET is not NULL, affect the current set of blocked signals by
combining it with *SET as indicated in OPERATION.
In this implementation, you are not allowed to change a signal handler
while the signal is blocked. */
+# if !@HAVE_POSIX_SIGNALBLOCKING@
# define SIG_BLOCK 0 /* blocked_set = blocked_set | *set; */
# define SIG_SETMASK 1 /* blocked_set = *set; */
# define SIG_UNBLOCK 2 /* blocked_set = blocked_set & ~*set; */
-extern int sigprocmask (int operation, const sigset_t *set, sigset_t *old_set);
+_GL_FUNCDECL_SYS (sigprocmask, int,
+ (int operation, const sigset_t *set, sigset_t *old_set));
+# endif
+_GL_CXXALIAS_SYS (sigprocmask, int,
+ (int operation, const sigset_t *set, sigset_t *old_set));
+_GL_CXXALIASWARN (sigprocmask);
-# define signal rpl_signal
/* Install the handler FUNC for signal SIG, and return the previous
handler. */
-extern void (*signal (int sig, void (*func) (int))) (int);
-
-# if GNULIB_defined_SIGPIPE
-
-/* Raise signal SIG. */
-# undef raise
-# define raise rpl_raise
-extern int raise (int sig);
-
+# ifdef __cplusplus
+extern "C" {
+# endif
+# if !GNULIB_defined_function_taking_int_returning_void_t
+typedef void (*_gl_function_taking_int_returning_void_t) (int);
+# define GNULIB_defined_function_taking_int_returning_void_t 1
+# endif
+# ifdef __cplusplus
+}
+# endif
+# if !@HAVE_POSIX_SIGNALBLOCKING@
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# define signal rpl_signal
# endif
+_GL_FUNCDECL_RPL (signal, _gl_function_taking_int_returning_void_t,
+ (int sig, _gl_function_taking_int_returning_void_t func));
+_GL_CXXALIAS_RPL (signal, _gl_function_taking_int_returning_void_t,
+ (int sig, _gl_function_taking_int_returning_void_t func));
+# else
+_GL_CXXALIAS_SYS (signal, _gl_function_taking_int_returning_void_t,
+ (int sig, _gl_function_taking_int_returning_void_t func));
+# endif
+_GL_CXXALIASWARN (signal);
+
+# if !@HAVE_POSIX_SIGNALBLOCKING@ && GNULIB_defined_SIGPIPE
+/* Raise signal SIGPIPE. */
+_GL_EXTERN_C int _gl_raise_SIGPIPE (void);
+# endif
-# endif /* !@HAVE_POSIX_SIGNALBLOCKING@ */
#elif defined GNULIB_POSIXCHECK
# undef sigaddset
-# define sigaddset(s,n) \
- (GL_LINK_WARNING ("sigaddset is unportable - " \
- "use gnulib module sigprocmask for portability"), \
- sigaddset (s, n))
+# if HAVE_RAW_DECL_SIGADDSET
+_GL_WARN_ON_USE (sigaddset, "sigaddset is unportable - "
+ "use the gnulib module sigprocmask for portability");
+# endif
# undef sigdelset
-# define sigdelset(s,n) \
- (GL_LINK_WARNING ("sigdelset is unportable - " \
- "use gnulib module sigprocmask for portability"), \
- sigdelset (s, n))
+# if HAVE_RAW_DECL_SIGDELSET
+_GL_WARN_ON_USE (sigdelset, "sigdelset is unportable - "
+ "use the gnulib module sigprocmask for portability");
+# endif
# undef sigemptyset
-# define sigemptyset(s) \
- (GL_LINK_WARNING ("sigemptyset is unportable - " \
- "use gnulib module sigprocmask for portability"), \
- sigemptyset (s))
+# if HAVE_RAW_DECL_SIGEMPTYSET
+_GL_WARN_ON_USE (sigemptyset, "sigemptyset is unportable - "
+ "use the gnulib module sigprocmask for portability");
+# endif
# undef sigfillset
-# define sigfillset(s) \
- (GL_LINK_WARNING ("sigfillset is unportable - " \
- "use gnulib module sigprocmask for portability"), \
- sigfillset (s))
+# if HAVE_RAW_DECL_SIGFILLSET
+_GL_WARN_ON_USE (sigfillset, "sigfillset is unportable - "
+ "use the gnulib module sigprocmask for portability");
+# endif
# undef sigismember
-# define sigismember(s,n) \
- (GL_LINK_WARNING ("sigismember is unportable - " \
- "use gnulib module sigprocmask for portability"), \
- sigismember (s, n))
+# if HAVE_RAW_DECL_SIGISMEMBER
+_GL_WARN_ON_USE (sigismember, "sigismember is unportable - "
+ "use the gnulib module sigprocmask for portability");
+# endif
# undef sigpending
-# define sigpending(s) \
- (GL_LINK_WARNING ("sigpending is unportable - " \
- "use gnulib module sigprocmask for portability"), \
- sigpending (s))
+# if HAVE_RAW_DECL_SIGPENDING
+_GL_WARN_ON_USE (sigpending, "sigpending is unportable - "
+ "use the gnulib module sigprocmask for portability");
+# endif
# undef sigprocmask
-# define sigprocmask(h,s,o) \
- (GL_LINK_WARNING ("sigprocmask is unportable - " \
- "use gnulib module sigprocmask for portability"), \
- sigprocmask (h, s, o))
+# if HAVE_RAW_DECL_SIGPROCMASK
+_GL_WARN_ON_USE (sigprocmask, "sigprocmask is unportable - "
+ "use the gnulib module sigprocmask for portability");
+# endif
#endif /* @GNULIB_SIGPROCMASK@ */
# if !@HAVE_SIGACTION@
# if !@HAVE_SIGINFO_T@
+
+# if !GNULIB_defined_siginfo_types
+
/* Present to allow compilation, but unsupported by gnulib. */
union sigval
{
union sigval si_value;
};
typedef struct siginfo_t siginfo_t;
+
+# define GNULIB_defined_siginfo_types 1
+# endif
+
# endif /* !@HAVE_SIGINFO_T@ */
/* We assume that platforms which lack the sigaction() function also lack
the 'struct sigaction' type, and vice versa. */
+# if !GNULIB_defined_struct_sigaction
+
struct sigaction
{
union
/* Not all POSIX flags are supported. */
int sa_flags;
};
-# define sa_handler _sa_func._sa_handler
-# define sa_sigaction _sa_func._sa_sigaction
+# define sa_handler _sa_func._sa_handler
+# define sa_sigaction _sa_func._sa_sigaction
/* Unsupported flags are not present. */
-# define SA_RESETHAND 1
-# define SA_NODEFER 2
-# define SA_RESTART 4
+# define SA_RESETHAND 1
+# define SA_NODEFER 2
+# define SA_RESTART 4
+
+# define GNULIB_defined_struct_sigaction 1
+# endif
-extern int sigaction (int, const struct sigaction *restrict,
- struct sigaction *restrict);
+_GL_FUNCDECL_SYS (sigaction, int, (int, const struct sigaction *restrict,
+ struct sigaction *restrict));
# elif !@HAVE_STRUCT_SIGACTION_SA_SIGACTION@
# define sa_sigaction sa_handler
# endif /* !@HAVE_SIGACTION@, !@HAVE_STRUCT_SIGACTION_SA_SIGACTION@ */
+
+_GL_CXXALIAS_SYS (sigaction, int, (int, const struct sigaction *restrict,
+ struct sigaction *restrict));
+_GL_CXXALIASWARN (sigaction);
+
#elif defined GNULIB_POSIXCHECK
# undef sigaction
-# define sigaction(s,a,o) \
- (GL_LINK_WARNING ("sigaction is unportable - " \
- "use gnulib module sigaction for portability"), \
- sigaction (s, a, o))
+# if HAVE_RAW_DECL_SIGACTION
+_GL_WARN_ON_USE (sigaction, "sigaction is unportable - "
+ "use the gnulib module sigaction for portability");
+# endif
#endif
/* Some systems don't have SA_NODEFER. */
#endif
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* _GL_SIGNAL_H */
-#endif /* _GL_SIGNAL_H */
+#endif /* _@GUARD_PREFIX@_SIGNAL_H */
+#endif /* _@GUARD_PREFIX@_SIGNAL_H */
#endif
projects / gnulib.git / blobdiff