/* Copyright (C) 1991-2018 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/>.  */

/*

 *	ISO C99 Standard: 7.13 Nonlocal jumps	<setjmp.h>

 */

#ifndef	_SETJMP_H

#define	_SETJMP_H	1

#include <features.h>

__BEGIN_DECLS

#include <bits/setjmp.h>		/* Get `__jmp_buf'.  */

#include <bits/types/__sigset_t.h>

/* Calling environment, plus possibly a saved signal mask.  */

struct __jmp_buf_tag

  {

    /* NOTE: The machine-dependent definitions of `__sigsetjmp'

       assume that a `jmp_buf' begins with a `__jmp_buf' and that

       `__mask_was_saved' follows it.  Do not move these members

       or add others before it.  */

    __jmp_buf __jmpbuf;		/* Calling environment.  */

    int __mask_was_saved;	/* Saved the signal mask?  */

    __sigset_t __saved_mask;	/* Saved signal mask.  */

  };

typedef struct __jmp_buf_tag jmp_buf[1];

/* Store the calling environment in ENV, also saving the signal mask.

   Return 0.  */

extern int setjmp (jmp_buf __env) __THROWNL;

/* Store the calling environment in ENV, also saving the

   signal mask if SAVEMASK is nonzero.  Return 0.

   This is the internal name for `sigsetjmp'.  */

extern int __sigsetjmp (struct __jmp_buf_tag __env[1], int __savemask) __THROWNL;

/* Store the calling environment in ENV, not saving the signal mask.

   Return 0.  */

extern int _setjmp (struct __jmp_buf_tag __env[1]) __THROWNL;

/* Do not save the signal mask.  This is equivalent to the `_setjmp'

   BSD function.  */

#define setjmp(env)	_setjmp (env)

/* Jump to the environment saved in ENV, making the

   `setjmp' call there return VAL, or 1 if VAL is 0.  */

extern void longjmp (struct __jmp_buf_tag __env[1], int __val)

     __THROWNL __attribute__ ((__noreturn__));

#if defined __USE_MISC || defined __USE_XOPEN

/* Same.  Usually `_longjmp' is used with `_setjmp', which does not save

   the signal mask.  But it is how ENV was saved that determines whether

   `longjmp' restores the mask; `_longjmp' is just an alias.  */

extern void _longjmp (struct __jmp_buf_tag __env[1], int __val)

     __THROWNL __attribute__ ((__noreturn__));

#endif

#ifdef	__USE_POSIX

/* Use the same type for `jmp_buf' and `sigjmp_buf'.

   The `__mask_was_saved' flag determines whether

   or not `longjmp' will restore the signal mask.  */

typedef struct __jmp_buf_tag sigjmp_buf[1];

/* Store the calling environment in ENV, also saving the

   signal mask if SAVEMASK is nonzero.  Return 0.  */

# define sigsetjmp(env, savemask)	__sigsetjmp (env, savemask)

/* Jump to the environment saved in ENV, making the

   sigsetjmp call there return VAL, or 1 if VAL is 0.

   Restore the signal mask if that sigsetjmp call saved it.

   This is just an alias `longjmp'.  */

extern void siglongjmp (sigjmp_buf __env, int __val)

     __THROWNL __attribute__ ((__noreturn__));

#endif /* Use POSIX.  */

/* Define helper functions to catch unsafe code.  */

#if __USE_FORTIFY_LEVEL > 0

# include <bits/setjmp2.h>

#endif

__END_DECLS

#endif /* setjmp.h  */