/* Copyright (C) 1991,92,93,94,95,96,97,98,99 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. */ /* * ISO C Standard: 4.6 NON-LOCAL 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. */ 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]; /* 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 (jmp_buf __env, int __savemask) __THROW; #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 /* Jump to the environment saved in ENV, making the `setjmp' call there return VAL, or 1 if VAL is 0. */ extern void longjmp (jmp_buf __env, int __val) __THROW __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 (jmp_buf __env, 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 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 (sigjmp_buf __env, int __val) __THROW __attribute__ ((__noreturn__)); #endif /* Use POSIX. */ __END_DECLS #endif /* setjmp.h */