122 lines
3.4 KiB
C
122 lines
3.4 KiB
C
/* Copyright (C) 1991 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
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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/*
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* ANSI 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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#include <traditional.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Get the machine-dependent definition of `__jmp_buf'. */
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#include <jmp_buf.h>
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#ifndef __NORETURN
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#ifdef __GNUC__
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/* The `volatile' keyword tells GCC that a function never returns. */
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#define __NORETURN __volatile
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#else /* Not GCC. */
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#define __NORETURN
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#endif /* GCC. */
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#endif /* __NORETURN not defined. */
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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 __NORETURN void __longjmp _ARGS((const __jmp_buf __env,
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int __val));
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extern __NORETURN void longjmp _ARGS((const __jmp_buf __env,
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int __val));
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#ifdef __OPTIMIZE__
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#define longjmp(env, val) __longjmp((env), (val))
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#endif /* Optimizing. */
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/* Set ENV to the current position and return 0. */
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extern int __setjmp _ARGS((__jmp_buf __env));
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/* The ANSI standard says `setjmp' is a macro. */
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#define setjmp(env) __setjmp(env)
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#ifdef __USE_POSIX
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#define __need_sigset_t
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#include <signal.h>
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/* Calling environment, plus possibly a saved signal mask. */
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typedef struct
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{
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__jmp_buf __jmpbuf; /* Calling environment. */
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sigset_t __sigmask; /* Saved signal mask. */
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unsigned int __savemask:1; /* Saved the signal mask? */
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} sigjmp_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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extern int sigsetjmp _ARGS((sigjmp_buf __env, int __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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extern __NORETURN void siglongjmp _ARGS((const sigjmp_buf __env,
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int __val));
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#endif /* Use POSIX. */
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#ifdef __USE_BSD
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extern __NORETURN void _longjmp _ARGS((const __jmp_buf __env,
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int __val));
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extern int _setjmp _ARGS((__jmp_buf __env));
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#ifdef __OPTIMIZE__
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#define _longjmp(env, val) longjmp((env), (val))
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#define _setjmp(env) setjmp(env)
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#endif /* Optimizing. */
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#endif /* Use BSD. */
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#ifdef __FAVOR_BSD
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/* BSD defines `setjmp' and `longjmp' to save and restore the set of
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blocked signals. For this, `jmp_buf' must be what POSIX calls
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`sigjmp_buf', which includes that information. */
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typedef sigjmp_buf jmp_buf;
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#undef setjmp
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#define setjmp(env) sigsetjmp((env), 1)
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#undef longjmp
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#define longjmp(env, val) siglongjmp((env), (val))
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#else /* Don't favor BSD. */
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/* A `jmp_buf' really is a `jmp_buf'. Oh boy. */
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typedef __jmp_buf jmp_buf;
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#endif /* Favor BSD. */
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#ifdef __cplusplus
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}
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#endif
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#endif /* setjmp.h */
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