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102 lines
3.7 KiB
C
102 lines
3.7 KiB
C
/* Copyright (C) 1991,92,93,94,95,96,97,98,99 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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/*
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* ISO C Standard: 4.6 NON-LOCAL JUMPS <setjmp.h>
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*/
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#ifndef _SETJMP_H
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#define _SETJMP_H 1
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#include <features.h>
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__BEGIN_DECLS
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#include <bits/setjmp.h> /* Get `__jmp_buf'. */
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#include <bits/sigset.h> /* Get `__sigset_t'. */
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/* Calling environment, plus possibly a saved signal mask. */
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typedef struct __jmp_buf_tag /* C++ doesn't like tagless structs. */
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{
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/* NOTE: The machine-dependent definitions of `__sigsetjmp'
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assume that a `jmp_buf' begins with a `__jmp_buf'.
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Do not move this member or add others before it. */
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__jmp_buf __jmpbuf; /* Calling environment. */
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int __mask_was_saved; /* Saved the signal mask? */
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__sigset_t __saved_mask; /* Saved signal mask. */
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} jmp_buf[1];
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/* Store the calling environment in ENV, also saving the
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signal mask if SAVEMASK is nonzero. Return 0.
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This is the internal name for `sigsetjmp'. */
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extern int __sigsetjmp (jmp_buf __env, int __savemask) __THROW;
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#ifndef __FAVOR_BSD
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/* Set ENV to the current position and return 0, not saving the signal mask.
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This is just like `sigsetjmp (ENV, 0)'.
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The ISO C standard says `setjmp' is a macro. */
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# define setjmp(env) __sigsetjmp ((env), 0)
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#else
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/* We are in 4.3 BSD-compatibility mode in which `setjmp'
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saves the signal mask like `sigsetjmp (ENV, 1)'. */
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# define setjmp(env) __sigsetjmp ((env), 1)
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#endif /* Favor BSD. */
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#if defined __USE_BSD || defined __USE_XOPEN
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/* Set ENV to the current position and return 0, not saving the signal mask.
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This is the 4.3 BSD name for ISO `setjmp'. */
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# define _setjmp(env) __sigsetjmp ((env), 0)
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#endif
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/* Jump to the environment saved in ENV, making the
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`setjmp' call there return VAL, or 1 if VAL is 0. */
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extern void longjmp (jmp_buf __env, int __val)
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__THROW __attribute__ ((__noreturn__));
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#if defined __USE_BSD || defined __USE_XOPEN
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/* Same. Usually `_longjmp' is used with `_setjmp', which does not save
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the signal mask. But it is how ENV was saved that determines whether
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`longjmp' restores the mask; `_longjmp' is just an alias. */
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extern void _longjmp (jmp_buf __env, int __val)
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__THROW __attribute__ ((__noreturn__));
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#endif
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#ifdef __USE_POSIX
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/* Use the same type for `jmp_buf' and `sigjmp_buf'.
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The `__mask_was_saved' flag determines whether
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or not `longjmp' will restore the signal mask. */
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typedef jmp_buf sigjmp_buf;
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/* Store the calling environment in ENV, also saving the
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signal mask if SAVEMASK is nonzero. Return 0. */
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# define sigsetjmp(env, savemask) __sigsetjmp ((env), (savemask))
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/* Jump to the environment saved in ENV, making the
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sigsetjmp call there return VAL, or 1 if VAL is 0.
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Restore the signal mask if that sigsetjmp call saved it.
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This is just an alias `longjmp'. */
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extern void siglongjmp (sigjmp_buf __env, int __val)
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__THROW __attribute__ ((__noreturn__));
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#endif /* Use POSIX. */
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__END_DECLS
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#endif /* setjmp.h */
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