102 lines
3.7 KiB
C
102 lines
3.7 KiB
C
/* 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 <bits/setjmp.h> /* Get `__jmp_buf'. */
|
|
#include <bits/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
|
|
|
|
|
|
#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 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__));
|
|
#endif /* Use POSIX. */
|
|
|
|
__END_DECLS
|
|
|
|
#endif /* setjmp.h */
|