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

   Copyright (C) 2006-2018 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 <https://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@ || defined 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.,

   <https://lists.gnu.org/r/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