[bpt/emacs.git] / lib / signal.in.h

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

   Copyright (C) 2006-2011 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

/* MacOS 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.  */

/* 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_SIGPROCMASK@
# if !@HAVE_POSIX_SIGNALBLOCKING@

/* 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

/* Test whether a given signal is contained in a signal set.  */
# if @HAVE_POSIX_SIGNALBLOCKING@
/* This function is defined as a macro on MacOS 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 MacOS 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 MacOS 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 MacOS 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 MacOS 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);

/* Raise signal SIG.  */
# if !@HAVE_POSIX_SIGNALBLOCKING@ && GNULIB_defined_SIGPIPE
#  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
_GL_CXXALIAS_SYS (raise, int, (int sig));
# endif
_GL_CXXALIASWARN (raise);

#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
6db30f83 PE	1	/* A GNU-like <signal.h>.
	2
	3	Copyright (C) 2006-2011 Free Software Foundation, Inc.
	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
	16	along with this program. If not, see <http://www.gnu.org/licenses/>. */
	17
	18	#if __GNUC__ >= 3
	19	@PRAGMA_SYSTEM_HEADER@
	20	#endif
	21	@PRAGMA_COLUMNS@
	22
2a84b02d PE	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. */
6db30f83 PE	34
	35	# @INCLUDE_NEXT@ @NEXT_SIGNAL_H@
	36
	37	#else
	38	/* Normal invocation convention. */
	39
	40	#ifndef _@GUARD_PREFIX@_SIGNAL_H
	41
2a84b02d PE	42	#define _GL_ALREADY_INCLUDING_SIGNAL_H
2a84b02d PE	43
6db30f83 PE	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
2a84b02d PE	53	#undef _GL_ALREADY_INCLUDING_SIGNAL_H
2a84b02d PE	54
6db30f83 PE	55	#ifndef _@GUARD_PREFIX@_SIGNAL_H
	56	#define _@GUARD_PREFIX@_SIGNAL_H
	57
2a84b02d PE	58	/* MacOS X 10.3, FreeBSD 6.4, OpenBSD 3.8, OSF/1 4.0, Solaris 2.6 declare
	59	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__) \|\| defined __FreeBSD__ \|\| defined __OpenBSD__ \|\| defined __osf__ \|\| defined __sun) \
	63	&& ! defined __GLIBC__
	64	# include <pthread.h>
	65	#endif
	66
6db30f83 PE	67	/* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */
	68
	69	/* The definition of _GL_ARG_NONNULL is copied here. */
	70
	71	/* The definition of _GL_WARN_ON_USE is copied here. */
	72
	73	/* On AIX, sig_atomic_t already includes volatile. C99 requires that
	74	'volatile sig_atomic_t' ignore the extra modifier, but C89 did not.
	75	Hence, redefine this to a non-volatile type as needed. */
	76	#if ! @HAVE_TYPE_VOLATILE_SIG_ATOMIC_T@
	77	# if !GNULIB_defined_sig_atomic_t
	78	typedef int rpl_sig_atomic_t;
	79	# undef sig_atomic_t
	80	# define sig_atomic_t rpl_sig_atomic_t
	81	# define GNULIB_defined_sig_atomic_t 1
	82	# endif
	83	#endif
	84
	85	/* A set or mask of signals. */
	86	#if !@HAVE_SIGSET_T@
	87	# if !GNULIB_defined_sigset_t
	88	typedef unsigned int sigset_t;
	89	# define GNULIB_defined_sigset_t 1
	90	# endif
	91	#endif
	92
	93	/* Define sighandler_t, the type of signal handlers. A GNU extension. */
	94	#if !@HAVE_SIGHANDLER_T@
	95	# ifdef __cplusplus
	96	extern "C" {
	97	# endif
	98	# if !GNULIB_defined_sighandler_t
	99	typedef void (*sighandler_t) (int);
	100	# define GNULIB_defined_sighandler_t 1
	101	# endif
	102	# ifdef __cplusplus
	103	}
	104	# endif
	105	#endif
	106
	107
	108	#if @GNULIB_SIGNAL_H_SIGPIPE@
	109	# ifndef SIGPIPE
	110	/* Define SIGPIPE to a value that does not overlap with other signals. */
	111	# define SIGPIPE 13
	112	# define GNULIB_defined_SIGPIPE 1
	113	/* To actually use SIGPIPE, you also need the gnulib modules 'sigprocmask',
	114	'write', 'stdio'. */
	115	# endif
	116	#endif
	117
	118
	119	/* Maximum signal number + 1. */
	120	#ifndef NSIG
	121	# if defined __TANDEM
	122	# define NSIG 32
	123	# endif
	124	#endif
	125
	126
	127	#if @GNULIB_PTHREAD_SIGMASK@
	128	# if @REPLACE_PTHREAD_SIGMASK@
2a84b02d PE	129	# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
	130	# undef pthread_sigmask
	131	# define pthread_sigmask rpl_pthread_sigmask
	132	# endif
	133	_GL_FUNCDECL_RPL (pthread_sigmask, int,
	134	(int how, const sigset_t new_mask, sigset_t old_mask));
	135	_GL_CXXALIAS_RPL (pthread_sigmask, int,
	136	(int how, const sigset_t new_mask, sigset_t old_mask));
	137	# else
	138	# if !@HAVE_PTHREAD_SIGMASK@
	139	_GL_FUNCDECL_SYS (pthread_sigmask, int,
	140	(int how, const sigset_t new_mask, sigset_t old_mask));
	141	# endif
	142	_GL_CXXALIAS_SYS (pthread_sigmask, int,
	143	(int how, const sigset_t new_mask, sigset_t old_mask));
6db30f83	144	# endif
2a84b02d	145	_GL_CXXALIASWARN (pthread_sigmask);
6db30f83 PE	146	#elif defined GNULIB_POSIXCHECK
	147	# undef pthread_sigmask
	148	# if HAVE_RAW_DECL_PTHREAD_SIGMASK
	149	_GL_WARN_ON_USE (pthread_sigmask, "pthread_sigmask is not portable - "
	150	"use gnulib module pthread_sigmask for portability");
	151	# endif
	152	#endif
	153
	154
	155	#if @GNULIB_SIGPROCMASK@
	156	# if !@HAVE_POSIX_SIGNALBLOCKING@
	157
	158	/* Maximum signal number + 1. */
	159	# ifndef NSIG
	160	# define NSIG 32
	161	# endif
	162
	163	/* This code supports only 32 signals. */
	164	# if !GNULIB_defined_verify_NSIG_constraint
	165	typedef int verify_NSIG_constraint[NSIG <= 32 ? 1 : -1];
	166	# define GNULIB_defined_verify_NSIG_constraint 1
	167	# endif
	168
	169	# endif
	170
	171	/* Test whether a given signal is contained in a signal set. */
	172	# if @HAVE_POSIX_SIGNALBLOCKING@
	173	/* This function is defined as a macro on MacOS X. */
	174	# if defined __cplusplus && defined GNULIB_NAMESPACE
	175	# undef sigismember
	176	# endif
	177	# else
	178	_GL_FUNCDECL_SYS (sigismember, int, (const sigset_t *set, int sig)
	179	_GL_ARG_NONNULL ((1)));
	180	# endif
	181	_GL_CXXALIAS_SYS (sigismember, int, (const sigset_t *set, int sig));
	182	_GL_CXXALIASWARN (sigismember);
	183
	184	/* Initialize a signal set to the empty set. */
	185	# if @HAVE_POSIX_SIGNALBLOCKING@
	186	/* This function is defined as a macro on MacOS X. */
	187	# if defined __cplusplus && defined GNULIB_NAMESPACE
	188	# undef sigemptyset
	189	# endif
	190	# else
	191	_GL_FUNCDECL_SYS (sigemptyset, int, (sigset_t *set) _GL_ARG_NONNULL ((1)));
	192	# endif
	193	_GL_CXXALIAS_SYS (sigemptyset, int, (sigset_t *set));
	194	_GL_CXXALIASWARN (sigemptyset);
	195
	196	/* Add a signal to a signal set. */
	197	# if @HAVE_POSIX_SIGNALBLOCKING@
	198	/* This function is defined as a macro on MacOS X. */
	199	# if defined __cplusplus && defined GNULIB_NAMESPACE
	200	# undef sigaddset
	201	# endif
	202	# else
	203	_GL_FUNCDECL_SYS (sigaddset, int, (sigset_t *set, int sig)
	204	_GL_ARG_NONNULL ((1)));
	205	# endif
	206	_GL_CXXALIAS_SYS (sigaddset, int, (sigset_t *set, int sig));
	207	_GL_CXXALIASWARN (sigaddset);
	208
	209	/* Remove a signal from a signal set. */
210	# if @HAVE_POSIX_SIGNALBLOCKING@
211	/* This function is defined as a macro on MacOS X. */
212	# if defined __cplusplus && defined GNULIB_NAMESPACE
213	# undef sigdelset
214	# endif
215	# else
216	_GL_FUNCDECL_SYS (sigdelset, int, (sigset_t *set, int sig)
217	_GL_ARG_NONNULL ((1)));
218	# endif
219	_GL_CXXALIAS_SYS (sigdelset, int, (sigset_t *set, int sig));
220	_GL_CXXALIASWARN (sigdelset);
221
222	/* Fill a signal set with all possible signals. */
223	# if @HAVE_POSIX_SIGNALBLOCKING@
224	/* This function is defined as a macro on MacOS X. */
225	# if defined __cplusplus && defined GNULIB_NAMESPACE
226	# undef sigfillset
227	# endif
228	# else
229	_GL_FUNCDECL_SYS (sigfillset, int, (sigset_t *set) _GL_ARG_NONNULL ((1)));
230	# endif
231	_GL_CXXALIAS_SYS (sigfillset, int, (sigset_t *set));
232	_GL_CXXALIASWARN (sigfillset);
233
234	/* Return the set of those blocked signals that are pending. */
235	# if !@HAVE_POSIX_SIGNALBLOCKING@
236	_GL_FUNCDECL_SYS (sigpending, int, (sigset_t *set) _GL_ARG_NONNULL ((1)));
237	# endif
238	_GL_CXXALIAS_SYS (sigpending, int, (sigset_t *set));
239	_GL_CXXALIASWARN (sigpending);
240
241	/* If OLD_SET is not NULL, put the current set of blocked signals in *OLD_SET.
242	Then, if SET is not NULL, affect the current set of blocked signals by
243	combining it with *SET as indicated in OPERATION.
244	In this implementation, you are not allowed to change a signal handler
245	while the signal is blocked. */
246	# if !@HAVE_POSIX_SIGNALBLOCKING@
247	# define SIG_BLOCK 0 /* blocked_set = blocked_set \| set; /
248	# define SIG_SETMASK 1 /* blocked_set = set; /
249	# define SIG_UNBLOCK 2 /* blocked_set = blocked_set & ~set; /
250	_GL_FUNCDECL_SYS (sigprocmask, int,
251	(int operation, const sigset_t set, sigset_t old_set));
252	# endif
253	_GL_CXXALIAS_SYS (sigprocmask, int,
254	(int operation, const sigset_t set, sigset_t old_set));
255	_GL_CXXALIASWARN (sigprocmask);
256
257	/* Install the handler FUNC for signal SIG, and return the previous
258	handler. */
259	# ifdef __cplusplus
260	extern "C" {
261	# endif
262	# if !GNULIB_defined_function_taking_int_returning_void_t
263	typedef void (*_gl_function_taking_int_returning_void_t) (int);
264	# define GNULIB_defined_function_taking_int_returning_void_t 1
265	# endif
266	# ifdef __cplusplus
267	}
268	# endif
269	# if !@HAVE_POSIX_SIGNALBLOCKING@
270	# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
271	# define signal rpl_signal
272	# endif
273	_GL_FUNCDECL_RPL (signal, _gl_function_taking_int_returning_void_t,
274	(int sig, _gl_function_taking_int_returning_void_t func));
275	_GL_CXXALIAS_RPL (signal, _gl_function_taking_int_returning_void_t,
276	(int sig, _gl_function_taking_int_returning_void_t func));
277	# else
278	_GL_CXXALIAS_SYS (signal, _gl_function_taking_int_returning_void_t,
279	(int sig, _gl_function_taking_int_returning_void_t func));
280	# endif
281	_GL_CXXALIASWARN (signal);
282
283	/* Raise signal SIG. */
284	# if !@HAVE_POSIX_SIGNALBLOCKING@ && GNULIB_defined_SIGPIPE
285	# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
286	# undef raise
287	# define raise rpl_raise
288	# endif
289	_GL_FUNCDECL_RPL (raise, int, (int sig));
290	_GL_CXXALIAS_RPL (raise, int, (int sig));
291	# else
292	_GL_CXXALIAS_SYS (raise, int, (int sig));
293	# endif
294	_GL_CXXALIASWARN (raise);
295
296	#elif defined GNULIB_POSIXCHECK
297	# undef sigaddset
298	# if HAVE_RAW_DECL_SIGADDSET
299	_GL_WARN_ON_USE (sigaddset, "sigaddset is unportable - "
300	"use the gnulib module sigprocmask for portability");
301	# endif
302	# undef sigdelset
303	# if HAVE_RAW_DECL_SIGDELSET
304	_GL_WARN_ON_USE (sigdelset, "sigdelset is unportable - "
305	"use the gnulib module sigprocmask for portability");
306	# endif
307	# undef sigemptyset
308	# if HAVE_RAW_DECL_SIGEMPTYSET
309	_GL_WARN_ON_USE (sigemptyset, "sigemptyset is unportable - "
310	"use the gnulib module sigprocmask for portability");
311	# endif
312	# undef sigfillset
313	# if HAVE_RAW_DECL_SIGFILLSET
314	_GL_WARN_ON_USE (sigfillset, "sigfillset is unportable - "
315	"use the gnulib module sigprocmask for portability");
316	# endif
317	# undef sigismember
318	# if HAVE_RAW_DECL_SIGISMEMBER
319	_GL_WARN_ON_USE (sigismember, "sigismember is unportable - "
320	"use the gnulib module sigprocmask for portability");
321	# endif
322	# undef sigpending
323	# if HAVE_RAW_DECL_SIGPENDING
324	_GL_WARN_ON_USE (sigpending, "sigpending is unportable - "
325	"use the gnulib module sigprocmask for portability");
326	# endif
327	# undef sigprocmask
328	# if HAVE_RAW_DECL_SIGPROCMASK
329	_GL_WARN_ON_USE (sigprocmask, "sigprocmask is unportable - "
330	"use the gnulib module sigprocmask for portability");
331	# endif
332	#endif /* @GNULIB_SIGPROCMASK@ */
333
334
335	#if @GNULIB_SIGACTION@
336	# if !@HAVE_SIGACTION@
337
338	# if !@HAVE_SIGINFO_T@
339
340	# if !GNULIB_defined_siginfo_types
341
342	/* Present to allow compilation, but unsupported by gnulib. */
343	union sigval
344	{
345	int sival_int;
346	void *sival_ptr;
347	};
348
349	/* Present to allow compilation, but unsupported by gnulib. */
350	struct siginfo_t
351	{
352	int si_signo;
353	int si_code;
354	int si_errno;
355	pid_t si_pid;
356	uid_t si_uid;
357	void *si_addr;
358	int si_status;
359	long si_band;
360	union sigval si_value;
361	};
362	typedef struct siginfo_t siginfo_t;
363
364	# define GNULIB_defined_siginfo_types 1
365	# endif
366
367	# endif /* !@HAVE_SIGINFO_T@ */
368
369	/* We assume that platforms which lack the sigaction() function also lack
370	the 'struct sigaction' type, and vice versa. */
371
372	# if !GNULIB_defined_struct_sigaction
373
374	struct sigaction
375	{
376	union
377	{
378	void (*_sa_handler) (int);
379	/* Present to allow compilation, but unsupported by gnulib. POSIX
380	says that implementations may, but not must, make sa_sigaction
381	overlap with sa_handler, but we know of no implementation where
382	they do not overlap. */
383	void (_sa_sigaction) (int, siginfo_t , void *);
384	} _sa_func;
385	sigset_t sa_mask;
386	/* Not all POSIX flags are supported. */
387	int sa_flags;
388	};
389	# define sa_handler _sa_func._sa_handler
390	# define sa_sigaction _sa_func._sa_sigaction
391	/* Unsupported flags are not present. */
392	# define SA_RESETHAND 1
393	# define SA_NODEFER 2
394	# define SA_RESTART 4
395
396	# define GNULIB_defined_struct_sigaction 1
397	# endif
398
399	_GL_FUNCDECL_SYS (sigaction, int, (int, const struct sigaction *restrict,
400	struct sigaction *restrict));
401
402	# elif !@HAVE_STRUCT_SIGACTION_SA_SIGACTION@
403
404	# define sa_sigaction sa_handler
405
406	# endif /* !@HAVE_SIGACTION@, !@HAVE_STRUCT_SIGACTION_SA_SIGACTION@ */
407
408	_GL_CXXALIAS_SYS (sigaction, int, (int, const struct sigaction *restrict,
409	struct sigaction *restrict));
410	_GL_CXXALIASWARN (sigaction);
411
412	#elif defined GNULIB_POSIXCHECK
413	# undef sigaction
414	# if HAVE_RAW_DECL_SIGACTION
415	_GL_WARN_ON_USE (sigaction, "sigaction is unportable - "
416	"use the gnulib module sigaction for portability");
417	# endif
418	#endif
419
420	/* Some systems don't have SA_NODEFER. */
421	#ifndef SA_NODEFER
422	# define SA_NODEFER 0
423	#endif
424
425
426	#endif /* _@GUARD_PREFIX@_SIGNAL_H */
427	#endif /* _@GUARD_PREFIX@_SIGNAL_H */
428	#endif