diff options
Diffstat (limited to 'include/setjmp.h')
| -rw-r--r-- | include/setjmp.h | 107 |
1 files changed, 92 insertions, 15 deletions
diff --git a/include/setjmp.h b/include/setjmp.h index 53d0223fd..821e20bb7 100644 --- a/include/setjmp.h +++ b/include/setjmp.h @@ -1,22 +1,99 @@ +/* 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. */ + /* - setjmp.h - stubs for future use. -*/ + * ISO C Standard: 4.6 NON-LOCAL JUMPS <setjmp.h> + */ -#ifndef _SETJMP_H_ -#ifdef __cplusplus -extern "C" { -#endif -#define _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]; -#include "_ansi.h" -#include <machine/setjmp.h> -void _EXFUN(longjmp,(jmp_buf __jmpb, int __retval)); -int _EXFUN(setjmp,(jmp_buf __jmpb)); +/* 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)); -#ifdef __cplusplus -} +#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 -#endif /* _SETJMP_H_ */ + +/* 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 */ |