[deliverable/binutils-gdb.git] / gnulib / import / signal.in.h

/* A GNU-like <signal.h>.

   Copyright (C) 2006-2016 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
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#if __GNUC__ >= 3
@PRAGMA_SYSTEM_HEADER@
#endif
@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 _@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@

#undef _GL_ALREADY_INCLUDING_SIGNAL_H

#ifndef _@GUARD_PREFIX@_SIGNAL_H
#define _@GUARD_PREFIX@_SIGNAL_H

/* Mac OS X 10.3, FreeBSD 6.4, OpenBSD 3.8, OSF/1 4.0, Solaris 2.6, Android
   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 __ANDROID__) \
    && ! 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.  */

/* 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
#  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

/* 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


#if @GNULIB_SIGNAL_H_SIGPIPE@
# ifndef SIGPIPE
/* Define SIGPIPE to a value that does not overlap with other signals.  */
#  define SIGPIPE 13
#  define GNULIB_defined_SIGPIPE 1
/* To actually use SIGPIPE, you also need the gnulib modules 'sigprocmask',
   'write', 'stdio'.  */
# 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.  */
#  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.  */
# 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.  */
# 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.  */
# 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.  */
# 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.  */
# 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.  */
# 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; */
_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);

/* Install the handler FUNC for signal SIG, and return the previous
   handler.  */
# 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

#elif defined GNULIB_POSIXCHECK
# undef sigaddset
# if HAVE_RAW_DECL_SIGADDSET
_GL_WARN_ON_USE (sigaddset, "sigaddset is unportable - "
                 "use the gnulib module sigprocmask for portability");
# endif
# undef sigdelset
# if HAVE_RAW_DECL_SIGDELSET
_GL_WARN_ON_USE (sigdelset, "sigdelset is unportable - "
                 "use the gnulib module sigprocmask for portability");
# endif
# undef sigemptyset
# if HAVE_RAW_DECL_SIGEMPTYSET
_GL_WARN_ON_USE (sigemptyset, "sigemptyset is unportable - "
                 "use the gnulib module sigprocmask for portability");
# endif
# undef sigfillset
# if HAVE_RAW_DECL_SIGFILLSET
_GL_WARN_ON_USE (sigfillset, "sigfillset is unportable - "
                 "use the gnulib module sigprocmask for portability");
# endif
# undef sigismember
# if HAVE_RAW_DECL_SIGISMEMBER
_GL_WARN_ON_USE (sigismember, "sigismember is unportable - "
                 "use the gnulib module sigprocmask for portability");
# endif
# undef sigpending
# if HAVE_RAW_DECL_SIGPENDING
_GL_WARN_ON_USE (sigpending, "sigpending is unportable - "
                 "use the gnulib module sigprocmask for portability");
# endif
# undef sigprocmask
# 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 @GNULIB_SIGACTION@
# if !@HAVE_SIGACTION@

#  if !@HAVE_SIGINFO_T@

#   if !GNULIB_defined_siginfo_types

/* Present to allow compilation, but unsupported by gnulib.  */
union sigval
{
  int sival_int;
  void *sival_ptr;
};

/* Present to allow compilation, but unsupported by gnulib.  */
struct siginfo_t
{
  int si_signo;
  int si_code;
  int si_errno;
  pid_t si_pid;
  uid_t si_uid;
  void *si_addr;
  int si_status;
  long si_band;
  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
  {
    void (*_sa_handler) (int);
    /* Present to allow compilation, but unsupported by gnulib.  POSIX
       says that implementations may, but not must, make sa_sigaction
       overlap with sa_handler, but we know of no implementation where
       they do not overlap.  */
    void (*_sa_sigaction) (int, siginfo_t *, void *);
  } _sa_func;
  sigset_t sa_mask;
  /* Not all POSIX flags are supported.  */
  int sa_flags;
};
#   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 GNULIB_defined_struct_sigaction 1
#  endif

_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
# 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.  */
#ifndef SA_NODEFER
# define SA_NODEFER 0
#endif


#endif /* _@GUARD_PREFIX@_SIGNAL_H */
#endif /* _@GUARD_PREFIX@_SIGNAL_H */
#endif
Commit	Line	Data
0750520d PA	1	/* A GNU-like <signal.h>.
0750520d PA	2
5e8754f9	3	Copyright (C) 2006-2016 Free Software Foundation, Inc.
0750520d PA	4
	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.
	9
	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.
	14
	15	You should have received a copy of the GNU General Public License
5e8754f9	16	along with this program. If not, see <http://www.gnu.org/licenses/>. */
0750520d PA	17
	18	#if __GNUC__ >= 3
	19	@PRAGMA_SYSTEM_HEADER@
	20	#endif
	21	@PRAGMA_COLUMNS@
	22
	23	#if defined __need_sig_atomic_t \|\| defined __need_sigset_t \|\| defined _GL_ALREADY_INCLUDING_SIGNAL_H \|\| (defined _SIGNAL_H && !defined __SIZEOF_PTHREAD_MUTEX_T)
	24	/* Special invocation convention:
	25	- Inside glibc header files.
	26	- On glibc systems we have a sequence of nested includes
	27	<signal.h> -> <ucontext.h> -> <signal.h>.
	28	In this situation, the functions are not yet declared, therefore we cannot
	29	provide the C++ aliases.
	30	- On glibc systems with GCC 4.3 we have a sequence of nested includes
	31	<csignal> -> </usr/include/signal.h> -> <sys/ucontext.h> -> <signal.h>.
	32	In this situation, some of the functions are not yet declared, therefore
	33	we cannot provide the C++ aliases. */
	34
	35	# @INCLUDE_NEXT@ @NEXT_SIGNAL_H@
	36
	37	#else
	38	/* Normal invocation convention. */
	39
	40	#ifndef _@GUARD_PREFIX@_SIGNAL_H
	41
	42	#define _GL_ALREADY_INCLUDING_SIGNAL_H
	43
	44	/* Define pid_t, uid_t.
	45	Also, mingw defines sigset_t not in <signal.h>, but in <sys/types.h>.
	46	On Solaris 10, <signal.h> includes <sys/types.h>, which eventually includes
	47	us; so include <sys/types.h> now, before the second inclusion guard. */
	48	#include <sys/types.h>
	49
	50	/* The include_next requires a split double-inclusion guard. */
	51	#@INCLUDE_NEXT@ @NEXT_SIGNAL_H@
	52
	53	#undef _GL_ALREADY_INCLUDING_SIGNAL_H
	54
	55	#ifndef _@GUARD_PREFIX@_SIGNAL_H
	56	#define _@GUARD_PREFIX@_SIGNAL_H
	57
	58	/* Mac OS X 10.3, FreeBSD 6.4, OpenBSD 3.8, OSF/1 4.0, Solaris 2.6, Android
	59	declare pthread_sigmask in <pthread.h>, not in <signal.h>.
	60	But avoid namespace pollution on glibc systems.*/
	61	#if (@GNULIB_PTHREAD_SIGMASK@ \|\| defined GNULIB_POSIXCHECK) \
	62	&& ((defined __APPLE__ && defined __MACH__) \
	63	\|\| defined __FreeBSD__ \|\| defined __OpenBSD__ \|\| defined __osf__ \
	64	\|\| defined __sun \|\| defined __ANDROID__) \
	65	&& ! defined __GLIBC__
	66	# include <pthread.h>
	67	#endif
	68
	69	/* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */
	70
	71	/* The definition of _GL_ARG_NONNULL is copied here. */
	72
	73	/* The definition of _GL_WARN_ON_USE is copied here. */
	74
	75	/* On AIX, sig_atomic_t already includes volatile. C99 requires that
	76	'volatile sig_atomic_t' ignore the extra modifier, but C89 did not.
	77	Hence, redefine this to a non-volatile type as needed. */
	78	#if ! @HAVE_TYPE_VOLATILE_SIG_ATOMIC_T@
	79	# if !GNULIB_defined_sig_atomic_t
	80	typedef int rpl_sig_atomic_t;
81	# undef sig_atomic_t
82	# define sig_atomic_t rpl_sig_atomic_t
83	# define GNULIB_defined_sig_atomic_t 1
84	# endif
85	#endif
86
87	/* A set or mask of signals. */
88	#if !@HAVE_SIGSET_T@
89	# if !GNULIB_defined_sigset_t
90	typedef unsigned int sigset_t;
91	# define GNULIB_defined_sigset_t 1
92	# endif
93	#endif
94
95	/* Define sighandler_t, the type of signal handlers. A GNU extension. */
96	#if !@HAVE_SIGHANDLER_T@
97	# ifdef __cplusplus
98	extern "C" {
99	# endif
100	# if !GNULIB_defined_sighandler_t
101	typedef void (*sighandler_t) (int);
102	# define GNULIB_defined_sighandler_t 1
103	# endif
104	# ifdef __cplusplus
105	}
106	# endif
107	#endif
108
109
110	#if @GNULIB_SIGNAL_H_SIGPIPE@
111	# ifndef SIGPIPE
112	/* Define SIGPIPE to a value that does not overlap with other signals. */
113	# define SIGPIPE 13
114	# define GNULIB_defined_SIGPIPE 1
115	/* To actually use SIGPIPE, you also need the gnulib modules 'sigprocmask',
116	'write', 'stdio'. */
117	# endif
118	#endif
119
120
121	/* Maximum signal number + 1. */
122	#ifndef NSIG
123	# if defined __TANDEM
124	# define NSIG 32
125	# endif
126	#endif
127
128
129	#if @GNULIB_PTHREAD_SIGMASK@
130	# if @REPLACE_PTHREAD_SIGMASK@
131	# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
132	# undef pthread_sigmask
133	# define pthread_sigmask rpl_pthread_sigmask
134	# endif
135	_GL_FUNCDECL_RPL (pthread_sigmask, int,
136	(int how, const sigset_t new_mask, sigset_t old_mask));
137	_GL_CXXALIAS_RPL (pthread_sigmask, int,
138	(int how, const sigset_t new_mask, sigset_t old_mask));
139	# else
5e8754f9	140	# if !@HAVE_PTHREAD_SIGMASK@
0750520d PA	141	_GL_FUNCDECL_SYS (pthread_sigmask, int,
	142	(int how, const sigset_t new_mask, sigset_t old_mask));
	143	# endif
	144	_GL_CXXALIAS_SYS (pthread_sigmask, int,
	145	(int how, const sigset_t new_mask, sigset_t old_mask));
	146	# endif
	147	_GL_CXXALIASWARN (pthread_sigmask);
	148	#elif defined GNULIB_POSIXCHECK
	149	# undef pthread_sigmask
	150	# if HAVE_RAW_DECL_PTHREAD_SIGMASK
	151	_GL_WARN_ON_USE (pthread_sigmask, "pthread_sigmask is not portable - "
	152	"use gnulib module pthread_sigmask for portability");
	153	# endif
	154	#endif
	155
	156
	157	#if @GNULIB_RAISE@
	158	# if @REPLACE_RAISE@
	159	# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
	160	# undef raise
	161	# define raise rpl_raise
	162	# endif
	163	_GL_FUNCDECL_RPL (raise, int, (int sig));
	164	_GL_CXXALIAS_RPL (raise, int, (int sig));
	165	# else
	166	# if !@HAVE_RAISE@
	167	_GL_FUNCDECL_SYS (raise, int, (int sig));
	168	# endif
	169	_GL_CXXALIAS_SYS (raise, int, (int sig));
	170	# endif
	171	_GL_CXXALIASWARN (raise);
	172	#elif defined GNULIB_POSIXCHECK
	173	# undef raise
	174	/* Assume raise is always declared. */
	175	_GL_WARN_ON_USE (raise, "raise can crash on native Windows - "
	176	"use gnulib module raise for portability");
	177	#endif
	178
	179
	180	#if @GNULIB_SIGPROCMASK@
	181	# if !@HAVE_POSIX_SIGNALBLOCKING@
	182
	183	# ifndef GNULIB_defined_signal_blocking
	184	# define GNULIB_defined_signal_blocking 1
	185	# endif
	186
	187	/* Maximum signal number + 1. */
	188	# ifndef NSIG
	189	# define NSIG 32
	190	# endif
	191
	192	/* This code supports only 32 signals. */
	193	# if !GNULIB_defined_verify_NSIG_constraint
	194	typedef int verify_NSIG_constraint[NSIG <= 32 ? 1 : -1];
	195	# define GNULIB_defined_verify_NSIG_constraint 1
	196	# endif
	197
	198	# endif
	199
	200	/* When also using extern inline, suppress the use of static inline in
	201	standard headers of problematic Apple configurations, as Libc at
	202	least through Libc-825.26 (2013-04-09) mishandles it; see, e.g.,
5e8754f9	203	<http://lists.gnu.org/archive/html/bug-gnulib/2012-12/msg00023.html>.
0750520d PA	204	Perhaps Apple will fix this some day. */
	205	#if (defined _GL_EXTERN_INLINE_IN_USE && defined __APPLE__ \
	206	&& (defined __i386__ \|\| defined __x86_64__))
	207	# undef sigaddset
	208	# undef sigdelset
	209	# undef sigemptyset
	210	# undef sigfillset
	211	# undef sigismember
	212	#endif
	213
	214	/* Test whether a given signal is contained in a signal set. */
	215	# if @HAVE_POSIX_SIGNALBLOCKING@
	216	/* This function is defined as a macro on Mac OS X. */
	217	# if defined __cplusplus && defined GNULIB_NAMESPACE
	218	# undef sigismember
	219	# endif
	220	# else
	221	_GL_FUNCDECL_SYS (sigismember, int, (const sigset_t *set, int sig)
	222	_GL_ARG_NONNULL ((1)));
	223	# endif
	224	_GL_CXXALIAS_SYS (sigismember, int, (const sigset_t *set, int sig));
	225	_GL_CXXALIASWARN (sigismember);
	226
	227	/* Initialize a signal set to the empty set. */
	228	# if @HAVE_POSIX_SIGNALBLOCKING@
	229	/* This function is defined as a macro on Mac OS X. */
	230	# if defined __cplusplus && defined GNULIB_NAMESPACE
	231	# undef sigemptyset
	232	# endif
	233	# else
	234	_GL_FUNCDECL_SYS (sigemptyset, int, (sigset_t *set) _GL_ARG_NONNULL ((1)));
	235	# endif
	236	_GL_CXXALIAS_SYS (sigemptyset, int, (sigset_t *set));
	237	_GL_CXXALIASWARN (sigemptyset);
	238
	239	/* Add a signal to a signal set. */
	240	# if @HAVE_POSIX_SIGNALBLOCKING@
	241	/* This function is defined as a macro on Mac OS X. */
	242	# if defined __cplusplus && defined GNULIB_NAMESPACE
	243	# undef sigaddset
	244	# endif
	245	# else
	246	_GL_FUNCDECL_SYS (sigaddset, int, (sigset_t *set, int sig)
	247	_GL_ARG_NONNULL ((1)));
	248	# endif
	249	_GL_CXXALIAS_SYS (sigaddset, int, (sigset_t *set, int sig));
	250	_GL_CXXALIASWARN (sigaddset);
	251
	252	/* Remove a signal from a signal set. */
	253	# if @HAVE_POSIX_SIGNALBLOCKING@
	254	/* This function is defined as a macro on Mac OS X. */
	255	# if defined __cplusplus && defined GNULIB_NAMESPACE
	256	# undef sigdelset
	257	# endif
	258	# else
	259	_GL_FUNCDECL_SYS (sigdelset, int, (sigset_t *set, int sig)
	260	_GL_ARG_NONNULL ((1)));
	261	# endif
	262	_GL_CXXALIAS_SYS (sigdelset, int, (sigset_t *set, int sig));
	263	_GL_CXXALIASWARN (sigdelset);
	264
	265	/* Fill a signal set with all possible signals. */
	266	# if @HAVE_POSIX_SIGNALBLOCKING@
	267	/* This function is defined as a macro on Mac OS X. */
268	# if defined __cplusplus && defined GNULIB_NAMESPACE
269	# undef sigfillset
270	# endif
271	# else
272	_GL_FUNCDECL_SYS (sigfillset, int, (sigset_t *set) _GL_ARG_NONNULL ((1)));
273	# endif
274	_GL_CXXALIAS_SYS (sigfillset, int, (sigset_t *set));
275	_GL_CXXALIASWARN (sigfillset);
276
277	/* Return the set of those blocked signals that are pending. */
278	# if !@HAVE_POSIX_SIGNALBLOCKING@
279	_GL_FUNCDECL_SYS (sigpending, int, (sigset_t *set) _GL_ARG_NONNULL ((1)));
280	# endif
281	_GL_CXXALIAS_SYS (sigpending, int, (sigset_t *set));
282	_GL_CXXALIASWARN (sigpending);
283
284	/* If OLD_SET is not NULL, put the current set of blocked signals in *OLD_SET.
285	Then, if SET is not NULL, affect the current set of blocked signals by
286	combining it with *SET as indicated in OPERATION.
287	In this implementation, you are not allowed to change a signal handler
288	while the signal is blocked. */
289	# if !@HAVE_POSIX_SIGNALBLOCKING@
290	# define SIG_BLOCK 0 /* blocked_set = blocked_set \| set; /
291	# define SIG_SETMASK 1 /* blocked_set = set; /
292	# define SIG_UNBLOCK 2 /* blocked_set = blocked_set & ~set; /
293	_GL_FUNCDECL_SYS (sigprocmask, int,
294	(int operation, const sigset_t set, sigset_t old_set));
295	# endif
296	_GL_CXXALIAS_SYS (sigprocmask, int,
297	(int operation, const sigset_t set, sigset_t old_set));
298	_GL_CXXALIASWARN (sigprocmask);
299
300	/* Install the handler FUNC for signal SIG, and return the previous
301	handler. */
302	# ifdef __cplusplus
303	extern "C" {
304	# endif
305	# if !GNULIB_defined_function_taking_int_returning_void_t
306	typedef void (*_gl_function_taking_int_returning_void_t) (int);
307	# define GNULIB_defined_function_taking_int_returning_void_t 1
308	# endif
309	# ifdef __cplusplus
310	}
311	# endif
312	# if !@HAVE_POSIX_SIGNALBLOCKING@
313	# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
314	# define signal rpl_signal
315	# endif
316	_GL_FUNCDECL_RPL (signal, _gl_function_taking_int_returning_void_t,
317	(int sig, _gl_function_taking_int_returning_void_t func));
318	_GL_CXXALIAS_RPL (signal, _gl_function_taking_int_returning_void_t,
319	(int sig, _gl_function_taking_int_returning_void_t func));
320	# else
321	_GL_CXXALIAS_SYS (signal, _gl_function_taking_int_returning_void_t,
322	(int sig, _gl_function_taking_int_returning_void_t func));
323	# endif
324	_GL_CXXALIASWARN (signal);
325
326	# if !@HAVE_POSIX_SIGNALBLOCKING@ && GNULIB_defined_SIGPIPE
327	/* Raise signal SIGPIPE. */
328	_GL_EXTERN_C int _gl_raise_SIGPIPE (void);
329	# endif
330
331	#elif defined GNULIB_POSIXCHECK
332	# undef sigaddset
333	# if HAVE_RAW_DECL_SIGADDSET
334	_GL_WARN_ON_USE (sigaddset, "sigaddset is unportable - "
335	"use the gnulib module sigprocmask for portability");
336	# endif
337	# undef sigdelset
338	# if HAVE_RAW_DECL_SIGDELSET
339	_GL_WARN_ON_USE (sigdelset, "sigdelset is unportable - "
340	"use the gnulib module sigprocmask for portability");
341	# endif
342	# undef sigemptyset
343	# if HAVE_RAW_DECL_SIGEMPTYSET
344	_GL_WARN_ON_USE (sigemptyset, "sigemptyset is unportable - "
345	"use the gnulib module sigprocmask for portability");
346	# endif
347	# undef sigfillset
348	# if HAVE_RAW_DECL_SIGFILLSET
349	_GL_WARN_ON_USE (sigfillset, "sigfillset is unportable - "
350	"use the gnulib module sigprocmask for portability");
351	# endif
352	# undef sigismember
353	# if HAVE_RAW_DECL_SIGISMEMBER
354	_GL_WARN_ON_USE (sigismember, "sigismember is unportable - "
355	"use the gnulib module sigprocmask for portability");
356	# endif
357	# undef sigpending
358	# if HAVE_RAW_DECL_SIGPENDING
359	_GL_WARN_ON_USE (sigpending, "sigpending is unportable - "
360	"use the gnulib module sigprocmask for portability");
361	# endif
362	# undef sigprocmask
363	# if HAVE_RAW_DECL_SIGPROCMASK
364	_GL_WARN_ON_USE (sigprocmask, "sigprocmask is unportable - "
365	"use the gnulib module sigprocmask for portability");
366	# endif
367	#endif /* @GNULIB_SIGPROCMASK@ */
368
369
370	#if @GNULIB_SIGACTION@
371	# if !@HAVE_SIGACTION@
372
373	# if !@HAVE_SIGINFO_T@
374
375	# if !GNULIB_defined_siginfo_types
376
377	/* Present to allow compilation, but unsupported by gnulib. */
378	union sigval
379	{
380	int sival_int;
381	void *sival_ptr;
382	};
383
384	/* Present to allow compilation, but unsupported by gnulib. */
385	struct siginfo_t
386	{
387	int si_signo;
388	int si_code;
389	int si_errno;
390	pid_t si_pid;
391	uid_t si_uid;
392	void *si_addr;
393	int si_status;
394	long si_band;
395	union sigval si_value;
396	};
397	typedef struct siginfo_t siginfo_t;
398
399	# define GNULIB_defined_siginfo_types 1
400	# endif
401
402	# endif /* !@HAVE_SIGINFO_T@ */
403
404	/* We assume that platforms which lack the sigaction() function also lack
405	the 'struct sigaction' type, and vice versa. */
406
407	# if !GNULIB_defined_struct_sigaction
408
409	struct sigaction
410	{
411	union
412	{
413	void (*_sa_handler) (int);
414	/* Present to allow compilation, but unsupported by gnulib. POSIX
415	says that implementations may, but not must, make sa_sigaction
416	overlap with sa_handler, but we know of no implementation where
417	they do not overlap. */
418	void (_sa_sigaction) (int, siginfo_t , void *);
419	} _sa_func;
420	sigset_t sa_mask;
421	/* Not all POSIX flags are supported. */
422	int sa_flags;
423	};
424	# define sa_handler _sa_func._sa_handler
425	# define sa_sigaction _sa_func._sa_sigaction
426	/* Unsupported flags are not present. */
427	# define SA_RESETHAND 1
428	# define SA_NODEFER 2
429	# define SA_RESTART 4
430
431	# define GNULIB_defined_struct_sigaction 1
432	# endif
433
434	_GL_FUNCDECL_SYS (sigaction, int, (int, const struct sigaction *restrict,
435	struct sigaction *restrict));
436
437	# elif !@HAVE_STRUCT_SIGACTION_SA_SIGACTION@
438
439	# define sa_sigaction sa_handler
440
441	# endif /* !@HAVE_SIGACTION@, !@HAVE_STRUCT_SIGACTION_SA_SIGACTION@ */
442
443	_GL_CXXALIAS_SYS (sigaction, int, (int, const struct sigaction *restrict,
444	struct sigaction *restrict));
445	_GL_CXXALIASWARN (sigaction);
446
447	#elif defined GNULIB_POSIXCHECK
448	# undef sigaction
449	# if HAVE_RAW_DECL_SIGACTION
450	_GL_WARN_ON_USE (sigaction, "sigaction is unportable - "
451	"use the gnulib module sigaction for portability");
452	# endif
453	#endif
454
455	/* Some systems don't have SA_NODEFER. */
456	#ifndef SA_NODEFER
457	# define SA_NODEFER 0
458	#endif
459
460
461	#endif /* _@GUARD_PREFIX@_SIGNAL_H */
462	#endif /* _@GUARD_PREFIX@_SIGNAL_H */
463	#endif