| /* 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) __THROWNL; |
| |
| __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) |
| __THROWNL; |
| |
| #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]) __THROWNL; |
| |
| /* 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) |
| __THROWNL __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) |
| __THROWNL __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) |
| __THROWNL __attribute__ ((__noreturn__)); |
| #endif /* Use POSIX. */ |
| |
| __END_DECLS |
| |
| #endif /* setjmp.h */ |