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- /* Copyright (C) 1991, 1992, 1993 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, 1992 Free Software Foundation, Inc., 675 Mass Ave,
- Cambridge, MA 02139, USA. */
-
- /*
- * ANSI Standard: 4.6 NON-LOCAL JUMPS <setjmp.h>
- */
-
- #ifndef _SETJMP_H
-
- #define _SETJMP_H 1
- #include <features.h>
-
- __BEGIN_DECLS
-
- /* Get the machine-dependent definition of `__jmp_buf'. */
- #include <jmp_buf.h>
-
-
- #ifdef __USE_POSIX
- #define __need_sigset_t
- #include <signal.h>
-
- /* Calling environment, plus possibly a saved signal mask. */
- typedef struct
- {
- __jmp_buf __jmpbuf; /* Calling environment. */
- int __mask_was_saved; /* Saved the signal mask? */
- sigset_t __saved_mask; /* Saved signal mask. */
- } sigjmp_buf[1];
-
- /* Store the calling environment in ENV, also saving the
- signal mask if SAVEMASK is nonzero. Return 0. */
- extern void __sigjmp_save __P ((sigjmp_buf __env, int __savemask));
- #ifdef __GNUC__
- #define sigsetjmp(env, savemask) \
- ({ __typeof ((*((sigjmp_buf *) 0))[0]) *__e = (env); \
- __sigjmp_save (__e, (savemask)); \
- __setjmp (__e[0].__jmpbuf); })
- #else
- /* Not strictly POSIX-compliant, because it evaluates ENV more than once. */
- #define sigsetjmp(env, savemask) \
- (__sigjmp_save ((env), (savemask)), __setjmp ((env)[0].__jmpbuf))
- #endif
-
-
- /* 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. */
- extern __NORETURN void siglongjmp __P ((__const sigjmp_buf __env, int __val));
- #endif /* Use POSIX. */
-
-
- #ifdef __FAVOR_BSD
-
- /* BSD defines `setjmp' and `longjmp' to save and restore the set of
- blocked signals. For this, `jmp_buf' must be what POSIX calls
- `sigjmp_buf', which includes that information. */
- typedef sigjmp_buf jmp_buf;
-
- #else /* Don't favor BSD. */
-
- /* A `jmp_buf' really is a `jmp_buf'. Oh boy. */
- typedef __jmp_buf jmp_buf;
-
- #endif /* Favor BSD. */
-
-
- /* Jump to the environment saved in ENV, making the
- setjmp call there return VAL, or 1 if VAL is 0. */
- extern __NORETURN void __longjmp __P ((__const __jmp_buf __env, int __val));
- extern __NORETURN void longjmp __P ((__const jmp_buf __env, int __val));
-
- #ifdef __OPTIMIZE__
- #define longjmp(env, val) __longjmp ((env), (val))
- #endif /* Optimizing. */
-
- /* Set ENV to the current position and return 0. */
- extern int __setjmp __P ((__jmp_buf __env));
- /* The ANSI C standard says `setjmp' is a macro. */
- #define setjmp(env) __setjmp (env)
-
-
- #ifdef __USE_BSD
- extern __NORETURN void _longjmp __P ((__const jmp_buf __env, int __val));
- #endif /* Use BSD. */
-
- #ifdef __FAVOR_BSD
-
- /* We are in the mode in which `setjmp' and `longjmp' save and restore
- the signal mask, and `jmp_buf' is `sigjmp_buf'. */
-
- #undef setjmp
- #undef longjmp
-
- #define setjmp(env) sigsetjmp ((env), 1)
-
- #ifdef __OPTIMIZE__
- #define longjmp(env, val) siglongjmp ((env), (val))
- #endif /* Optimizing. */
-
- #define _setjmp(env) sigsetjmp ((env), 0)
-
- #else /* Don't favor BSD. */
-
- /* `setjmp' and `_setjmp' are the same. */
- #define _setjmp(env) setjmp (env)
-
- /* `longjmp' and `_longjmp' are the same. */
- #define _longjmp(env, val) longjmp ((env), (val))
-
- #endif /* Favor BSD. */
-
-
- __END_DECLS
-
- #endif /* setjmp.h */
-