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

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

   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 Lesser 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 Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser 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 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_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
35428fb6 LC	1	/* A GNU-like <signal.h>.
35428fb6 LC	2
5e69ceb7	3	Copyright (C) 2006-2014 Free Software Foundation, Inc.
35428fb6 LC	4
	5	This program is free software: you can redistribute it and/or modify
	6	it under the terms of the GNU Lesser 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 Lesser General Public License for more details.
	14
	15	You should have received a copy of the GNU Lesser 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
	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
005de2e8	58	/* Mac OS X 10.3, FreeBSD 6.4, OpenBSD 3.8, OSF/1 4.0, Solaris 2.6 declare
35428fb6 LC	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
	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@
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));
144	# endif
145	_GL_CXXALIASWARN (pthread_sigmask);
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_RAISE@
156	# if @REPLACE_RAISE@
157	# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
158	# undef raise
159	# define raise rpl_raise
160	# endif
161	_GL_FUNCDECL_RPL (raise, int, (int sig));
162	_GL_CXXALIAS_RPL (raise, int, (int sig));
163	# else
164	# if !@HAVE_RAISE@
165	_GL_FUNCDECL_SYS (raise, int, (int sig));
166	# endif
167	_GL_CXXALIAS_SYS (raise, int, (int sig));
168	# endif
169	_GL_CXXALIASWARN (raise);
170	#elif defined GNULIB_POSIXCHECK
171	# undef raise
172	/* Assume raise is always declared. */
173	_GL_WARN_ON_USE (raise, "raise can crash on native Windows - "
174	"use gnulib module raise for portability");
175	#endif
176
177
178	#if @GNULIB_SIGPROCMASK@
179	# if !@HAVE_POSIX_SIGNALBLOCKING@
180
181	# ifndef GNULIB_defined_signal_blocking
182	# define GNULIB_defined_signal_blocking 1
183	# endif
184
185	/* Maximum signal number + 1. */
186	# ifndef NSIG
187	# define NSIG 32
188	# endif
189
190	/* This code supports only 32 signals. */
191	# if !GNULIB_defined_verify_NSIG_constraint
192	typedef int verify_NSIG_constraint[NSIG <= 32 ? 1 : -1];
193	# define GNULIB_defined_verify_NSIG_constraint 1
194	# endif
195
196	# endif
197
5e69ceb7 MW	198	/* When also using extern inline, suppress the use of static inline in
	199	standard headers of problematic Apple configurations, as Libc at
	200	least through Libc-825.26 (2013-04-09) mishandles it; see, e.g.,
	201	<http://lists.gnu.org/archive/html/bug-gnulib/2012-12/msg00023.html>.
	202	Perhaps Apple will fix this some day. */
	203	#if (defined _GL_EXTERN_INLINE_IN_USE && defined __APPLE__ \
	204	&& (defined __i386__ \|\| defined __x86_64__))
	205	# undef sigaddset
	206	# undef sigdelset
	207	# undef sigemptyset
	208	# undef sigfillset
	209	# undef sigismember
	210	#endif
	211
35428fb6 LC	212	/* Test whether a given signal is contained in a signal set. */
35428fb6 LC	213	# if @HAVE_POSIX_SIGNALBLOCKING@
005de2e8	214	/* This function is defined as a macro on Mac OS X. */
35428fb6 LC	215	# if defined __cplusplus && defined GNULIB_NAMESPACE
	216	# undef sigismember
	217	# endif
	218	# else
	219	_GL_FUNCDECL_SYS (sigismember, int, (const sigset_t *set, int sig)
	220	_GL_ARG_NONNULL ((1)));
	221	# endif
	222	_GL_CXXALIAS_SYS (sigismember, int, (const sigset_t *set, int sig));
	223	_GL_CXXALIASWARN (sigismember);
	224
	225	/* Initialize a signal set to the empty set. */
	226	# if @HAVE_POSIX_SIGNALBLOCKING@
005de2e8	227	/* This function is defined as a macro on Mac OS X. */
35428fb6 LC	228	# if defined __cplusplus && defined GNULIB_NAMESPACE
	229	# undef sigemptyset
	230	# endif
	231	# else
	232	_GL_FUNCDECL_SYS (sigemptyset, int, (sigset_t *set) _GL_ARG_NONNULL ((1)));
	233	# endif
	234	_GL_CXXALIAS_SYS (sigemptyset, int, (sigset_t *set));
	235	_GL_CXXALIASWARN (sigemptyset);
	236
	237	/* Add a signal to a signal set. */
	238	# if @HAVE_POSIX_SIGNALBLOCKING@
005de2e8	239	/* This function is defined as a macro on Mac OS X. */
35428fb6 LC	240	# if defined __cplusplus && defined GNULIB_NAMESPACE
	241	# undef sigaddset
	242	# endif
	243	# else
	244	_GL_FUNCDECL_SYS (sigaddset, int, (sigset_t *set, int sig)
	245	_GL_ARG_NONNULL ((1)));
	246	# endif
	247	_GL_CXXALIAS_SYS (sigaddset, int, (sigset_t *set, int sig));
	248	_GL_CXXALIASWARN (sigaddset);
	249
	250	/* Remove a signal from a signal set. */
	251	# if @HAVE_POSIX_SIGNALBLOCKING@
005de2e8	252	/* This function is defined as a macro on Mac OS X. */
35428fb6 LC	253	# if defined __cplusplus && defined GNULIB_NAMESPACE
	254	# undef sigdelset
	255	# endif
	256	# else
	257	_GL_FUNCDECL_SYS (sigdelset, int, (sigset_t *set, int sig)
	258	_GL_ARG_NONNULL ((1)));
	259	# endif
	260	_GL_CXXALIAS_SYS (sigdelset, int, (sigset_t *set, int sig));
	261	_GL_CXXALIASWARN (sigdelset);
	262
	263	/* Fill a signal set with all possible signals. */
	264	# if @HAVE_POSIX_SIGNALBLOCKING@
005de2e8	265	/* This function is defined as a macro on Mac OS X. */
35428fb6 LC	266	# if defined __cplusplus && defined GNULIB_NAMESPACE
	267	# undef sigfillset
	268	# endif
	269	# else
	270	_GL_FUNCDECL_SYS (sigfillset, int, (sigset_t *set) _GL_ARG_NONNULL ((1)));
	271	# endif
	272	_GL_CXXALIAS_SYS (sigfillset, int, (sigset_t *set));
	273	_GL_CXXALIASWARN (sigfillset);
	274
	275	/* Return the set of those blocked signals that are pending. */
	276	# if !@HAVE_POSIX_SIGNALBLOCKING@
	277	_GL_FUNCDECL_SYS (sigpending, int, (sigset_t *set) _GL_ARG_NONNULL ((1)));
	278	# endif
	279	_GL_CXXALIAS_SYS (sigpending, int, (sigset_t *set));
	280	_GL_CXXALIASWARN (sigpending);
	281
	282	/* If OLD_SET is not NULL, put the current set of blocked signals in *OLD_SET.
	283	Then, if SET is not NULL, affect the current set of blocked signals by
	284	combining it with *SET as indicated in OPERATION.
	285	In this implementation, you are not allowed to change a signal handler
	286	while the signal is blocked. */
	287	# if !@HAVE_POSIX_SIGNALBLOCKING@
	288	# define SIG_BLOCK 0 /* blocked_set = blocked_set \| set; /
	289	# define SIG_SETMASK 1 /* blocked_set = set; /
	290	# define SIG_UNBLOCK 2 /* blocked_set = blocked_set & ~set; /
	291	_GL_FUNCDECL_SYS (sigprocmask, int,
	292	(int operation, const sigset_t set, sigset_t old_set));
	293	# endif
	294	_GL_CXXALIAS_SYS (sigprocmask, int,
	295	(int operation, const sigset_t set, sigset_t old_set));
	296	_GL_CXXALIASWARN (sigprocmask);
	297
	298	/* Install the handler FUNC for signal SIG, and return the previous
	299	handler. */
	300	# ifdef __cplusplus
	301	extern "C" {
	302	# endif
	303	# if !GNULIB_defined_function_taking_int_returning_void_t
	304	typedef void (*_gl_function_taking_int_returning_void_t) (int);
	305	# define GNULIB_defined_function_taking_int_returning_void_t 1
	306	# endif
	307	# ifdef __cplusplus
	308	}
	309	# endif
	310	# if !@HAVE_POSIX_SIGNALBLOCKING@
	311	# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
	312	# define signal rpl_signal
	313	# endif
	314	_GL_FUNCDECL_RPL (signal, _gl_function_taking_int_returning_void_t,
	315	(int sig, _gl_function_taking_int_returning_void_t func));
	316	_GL_CXXALIAS_RPL (signal, _gl_function_taking_int_returning_void_t,
	317	(int sig, _gl_function_taking_int_returning_void_t func));
	318	# else
	319	_GL_CXXALIAS_SYS (signal, _gl_function_taking_int_returning_void_t,
	320	(int sig, _gl_function_taking_int_returning_void_t func));
	321	# endif
	322	_GL_CXXALIASWARN (signal);
	323
	324	# if !@HAVE_POSIX_SIGNALBLOCKING@ && GNULIB_defined_SIGPIPE
	325	/* Raise signal SIGPIPE. */
	326	_GL_EXTERN_C int _gl_raise_SIGPIPE (void);
	327	# endif
	328
	329	#elif defined GNULIB_POSIXCHECK
330	# undef sigaddset
331	# if HAVE_RAW_DECL_SIGADDSET
332	_GL_WARN_ON_USE (sigaddset, "sigaddset is unportable - "
333	"use the gnulib module sigprocmask for portability");
334	# endif
335	# undef sigdelset
336	# if HAVE_RAW_DECL_SIGDELSET
337	_GL_WARN_ON_USE (sigdelset, "sigdelset is unportable - "
338	"use the gnulib module sigprocmask for portability");
339	# endif
340	# undef sigemptyset
341	# if HAVE_RAW_DECL_SIGEMPTYSET
342	_GL_WARN_ON_USE (sigemptyset, "sigemptyset is unportable - "
343	"use the gnulib module sigprocmask for portability");
344	# endif
345	# undef sigfillset
346	# if HAVE_RAW_DECL_SIGFILLSET
347	_GL_WARN_ON_USE (sigfillset, "sigfillset is unportable - "
348	"use the gnulib module sigprocmask for portability");
349	# endif
350	# undef sigismember
351	# if HAVE_RAW_DECL_SIGISMEMBER
352	_GL_WARN_ON_USE (sigismember, "sigismember is unportable - "
353	"use the gnulib module sigprocmask for portability");
354	# endif
355	# undef sigpending
356	# if HAVE_RAW_DECL_SIGPENDING
357	_GL_WARN_ON_USE (sigpending, "sigpending is unportable - "
358	"use the gnulib module sigprocmask for portability");
359	# endif
360	# undef sigprocmask
361	# if HAVE_RAW_DECL_SIGPROCMASK
362	_GL_WARN_ON_USE (sigprocmask, "sigprocmask is unportable - "
363	"use the gnulib module sigprocmask for portability");
364	# endif
365	#endif /* @GNULIB_SIGPROCMASK@ */
366
367
368	#if @GNULIB_SIGACTION@
369	# if !@HAVE_SIGACTION@
370
371	# if !@HAVE_SIGINFO_T@
372
373	# if !GNULIB_defined_siginfo_types
374
375	/* Present to allow compilation, but unsupported by gnulib. */
376	union sigval
377	{
378	int sival_int;
379	void *sival_ptr;
380	};
381
382	/* Present to allow compilation, but unsupported by gnulib. */
383	struct siginfo_t
384	{
385	int si_signo;
386	int si_code;
387	int si_errno;
388	pid_t si_pid;
389	uid_t si_uid;
390	void *si_addr;
391	int si_status;
392	long si_band;
393	union sigval si_value;
394	};
395	typedef struct siginfo_t siginfo_t;
396
397	# define GNULIB_defined_siginfo_types 1
398	# endif
399
400	# endif /* !@HAVE_SIGINFO_T@ */
401
402	/* We assume that platforms which lack the sigaction() function also lack
403	the 'struct sigaction' type, and vice versa. */
404
405	# if !GNULIB_defined_struct_sigaction
406
407	struct sigaction
408	{
409	union
410	{
411	void (*_sa_handler) (int);
412	/* Present to allow compilation, but unsupported by gnulib. POSIX
413	says that implementations may, but not must, make sa_sigaction
414	overlap with sa_handler, but we know of no implementation where
415	they do not overlap. */
416	void (_sa_sigaction) (int, siginfo_t , void *);
417	} _sa_func;
418	sigset_t sa_mask;
419	/* Not all POSIX flags are supported. */
420	int sa_flags;
421	};
422	# define sa_handler _sa_func._sa_handler
423	# define sa_sigaction _sa_func._sa_sigaction
424	/* Unsupported flags are not present. */
425	# define SA_RESETHAND 1
426	# define SA_NODEFER 2
427	# define SA_RESTART 4
428
429	# define GNULIB_defined_struct_sigaction 1
430	# endif
431
432	_GL_FUNCDECL_SYS (sigaction, int, (int, const struct sigaction *restrict,
433	struct sigaction *restrict));
434
435	# elif !@HAVE_STRUCT_SIGACTION_SA_SIGACTION@
436
437	# define sa_sigaction sa_handler
438
439	# endif /* !@HAVE_SIGACTION@, !@HAVE_STRUCT_SIGACTION_SA_SIGACTION@ */
440
441	_GL_CXXALIAS_SYS (sigaction, int, (int, const struct sigaction *restrict,
442	struct sigaction *restrict));
443	_GL_CXXALIASWARN (sigaction);
444
445	#elif defined GNULIB_POSIXCHECK
446	# undef sigaction
447	# if HAVE_RAW_DECL_SIGACTION
448	_GL_WARN_ON_USE (sigaction, "sigaction is unportable - "
449	"use the gnulib module sigaction for portability");
450	# endif
451	#endif
452
453	/* Some systems don't have SA_NODEFER. */
454	#ifndef SA_NODEFER
455	# define SA_NODEFER 0
456	#endif
457
458
459	#endif /* _@GUARD_PREFIX@_SIGNAL_H */
460	#endif /* _@GUARD_PREFIX@_SIGNAL_H */
461	#endif