/* Definitions for 31 & 64 bit S/390 sigaction.

   Copyright (C) 2001-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library 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 2.1 of the License, or (at your option) any later version.

   The GNU C Library 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 the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#ifndef _BITS_SIGACTION_H

#define _BITS_SIGACTION_H 1

#ifndef _SIGNAL_H

# error "Never include <bits/sigaction.h> directly; use <signal.h> instead."

#endif

#include <bits/wordsize.h>

#if __WORDSIZE == 64

/* Structure describing the action to be taken when a signal arrives.  */

struct sigaction

  {

    /* Signal handler.	*/

#if defined __USE_POSIX199309 || defined __USE_XOPEN_EXTENDED

    union

      {

	/* Used if SA_SIGINFO is not set.  */

	__sighandler_t sa_handler;

	/* Used if SA_SIGINFO is set.  */

	void (*sa_sigaction) (int, siginfo_t *, void *);

      }

    __sigaction_handler;

# define sa_handler	__sigaction_handler.sa_handler

# define sa_sigaction	__sigaction_handler.sa_sigaction

#else

    __sighandler_t sa_handler;

#endif

    /* Special flags.  */

    int __glibc_reserved0;

    int sa_flags;

    /* Restore handler.  */

    void (*sa_restorer) (void);

    /* Additional set of signals to be blocked.	 */

    __sigset_t sa_mask;

  };

#else

/* Structure describing the action to be taken when a signal arrives.  */

struct sigaction

  {

    /* Signal handler.  */

#if defined __USE_POSIX199309 || defined __USE_XOPEN_EXTENDED

    union

      {

	/* Used if SA_SIGINFO is not set.  */

	__sighandler_t sa_handler;

	/* Used if SA_SIGINFO is set.  */

	void (*sa_sigaction) (int, siginfo_t *, void *);

      }

    __sigaction_handler;

# define sa_handler	__sigaction_handler.sa_handler

# define sa_sigaction	__sigaction_handler.sa_sigaction

#else

    __sighandler_t sa_handler;

#endif

    /* Additional set of signals to be blocked.  */

    __sigset_t sa_mask;

    /* Special flags.  */

    int sa_flags;

    /* Restore handler.  */

    void (*sa_restorer) (void);

  };

#endif

/* Bits in `sa_flags'.  */

#define	SA_NOCLDSTOP  1		 /* Don't send SIGCHLD when children stop.  */

#define SA_NOCLDWAIT  2		 /* Don't create zombie on child death.  */

#define SA_SIGINFO    4		 /* Invoke signal-catching function with

				    three arguments instead of one.  */

#if defined __USE_XOPEN_EXTENDED || defined __USE_MISC

# define SA_ONSTACK   0x08000000 /* Use signal stack by using `sa_restorer'. */

#endif

#if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8

# define SA_RESTART   0x10000000 /* Restart syscall on signal return.  */

# define SA_NODEFER   0x40000000 /* Don't automatically block the signal when

				    its handler is being executed.	 */

# define SA_RESETHAND 0x80000000 /* Reset to SIG_DFL on entry to handler.  */

#endif

#ifdef __USE_MISC

# define SA_INTERRUPT 0x20000000 /* Historical no-op.  */

/* Some aliases for the SA_ constants.	*/

# define SA_NOMASK    SA_NODEFER

# define SA_ONESHOT   SA_RESETHAND

# define SA_STACK     SA_ONSTACK

#endif

/* Values for the HOW argument to `sigprocmask'.  */

#define	SIG_BLOCK     0		 /* Block signals.  */

#define	SIG_UNBLOCK   1		 /* Unblock signals.  */

#define	SIG_SETMASK   2		 /* Set the set of blocked signals.  */

#endif