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/* Copyright (C) 1991,92,93,94,95,96,97,98 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 Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
/*
* ISO C Standard: 4.6 NON-LOCAL JUMPS <setjmp.h>
*/
#ifndef _SETJMP_H
#define _SETJMP_H 1
#include <features.h>
__BEGIN_DECLS
#include <machine/setjmp.h> /* Get `__jmp_buf'. */
#include <machine/sigset.h> /* Get `__sigset_t'. */
/* Calling environment, plus possibly a saved signal mask. */
typedef struct __jmp_buf_tag /* C++ doesn't like tagless structs. */
{
/* NOTE: The machine-dependent definitions of `__sigsetjmp'
assume that a `jmp_buf' begins with a `__jmp_buf'.
Do not move this member 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. */
} jmp_buf[1];
/* 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 __P ((jmp_buf __env, int __savemask));
#ifndef __FAVOR_BSD
/* Set ENV to the current position and return 0, not saving the signal mask.
This is just like `sigsetjmp (ENV, 0)'.
The ISO C standard says `setjmp' is a macro. */
# define setjmp(env) __sigsetjmp ((env), 0)
#else
/* We are in 4.3 BSD-compatibility mode in which `setjmp'
saves the signal mask like `sigsetjmp (ENV, 1)'. */
# define setjmp(env) __sigsetjmp ((env), 1)
#endif /* Favor BSD. */
#if defined __USE_BSD || defined __USE_XOPEN
/* Set ENV to the current position and return 0, not saving the signal mask.
This is the 4.3 BSD name for ISO `setjmp'. */
# define _setjmp(env) __sigsetjmp ((env), 0)
#endif
/* Jump to the environment saved in ENV, making the
`setjmp' call there return VAL, or 1 if VAL is 0. */
extern void longjmp __P ((jmp_buf __env, int __val))
__attribute__ ((__noreturn__));
#if defined __USE_BSD || 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 __P ((jmp_buf __env, int __val))
__attribute__ ((__noreturn__));
#endif
/* 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 jmp_buf sigjmp_buf;
/* 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 __P ((sigjmp_buf __env, int __val))
__attribute__ ((__noreturn__));
__END_DECLS
#endif /* setjmp.h */
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