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- /* Copyright (C) 1991-1999,2001,2002,2007,2009 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 Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 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
- Lesser General Public License for more details.
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, see
- <http://www.gnu.org/licenses/>. */
- /*
- * ISO C99 Standard: 7.13 Nonlocal 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. */
- struct __jmp_buf_tag
- {
- /* NOTE: The machine-dependent definitions of `__sigsetjmp'
- assume that a `jmp_buf' begins with a `__jmp_buf' and that
- `__mask_was_saved' follows it. Do not move these members
- 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. */
- };
- __BEGIN_NAMESPACE_STD
- typedef struct __jmp_buf_tag jmp_buf[1];
- /* Store the calling environment in ENV, also saving the signal mask.
- Return 0. */
- extern int setjmp (jmp_buf __env) __THROW;
- __END_NAMESPACE_STD
- /* 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 (struct __jmp_buf_tag __env[1], int __savemask) __THROW;
- #ifndef __FAVOR_BSD
- /* Store the calling environment in ENV, not saving the signal mask.
- Return 0. */
- extern int _setjmp (struct __jmp_buf_tag __env[1]) __THROW;
- /* Do not save the signal mask. This is equivalent to the `_setjmp'
- BSD function. */
- # define setjmp(env) _setjmp (env)
- #else
- /* We are in 4.3 BSD-compatibility mode in which `setjmp'
- saves the signal mask like `sigsetjmp (ENV, 1)'. We have to
- define a macro since ISO C says `setjmp' is one. */
- # define setjmp(env) setjmp (env)
- #endif /* Favor BSD. */
- __BEGIN_NAMESPACE_STD
- /* Jump to the environment saved in ENV, making the
- `setjmp' call there return VAL, or 1 if VAL is 0. */
- extern void longjmp (struct __jmp_buf_tag __env[1], int __val)
- __THROW __attribute__ ((__noreturn__));
- __END_NAMESPACE_STD
- #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 (struct __jmp_buf_tag __env[1], int __val)
- __THROW __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 struct __jmp_buf_tag sigjmp_buf[1];
- /* 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 (sigjmp_buf __env, int __val)
- __THROW __attribute__ ((__noreturn__));
- #endif /* Use POSIX. */
- __END_DECLS
- #ifdef _LIBC
- extern void __longjmp(__jmp_buf __env, int __val) attribute_noreturn;
- libc_hidden_proto(__longjmp)
- extern __typeof(longjmp) __libc_longjmp attribute_noreturn;
- extern __typeof(siglongjmp) __libc_siglongjmp attribute_noreturn;
- extern void _longjmp_unwind(jmp_buf __env, int __val);
- libc_hidden_proto(_longjmp_unwind)
- extern int __sigjmp_save(sigjmp_buf __env, int __savemask) attribute_hidden;
- /* We use the normal longjmp for unwinding */
- # define __libc_unwind_longjmp(buf, val) __libc_longjmp(buf, val)
- #endif
- #endif /* setjmp.h */
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