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Diffstat (limited to 'bits/sigset.h')
| -rw-r--r-- | bits/sigset.h | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/bits/sigset.h b/bits/sigset.h new file mode 100644 index 0000000000..9fad4538d7 --- /dev/null +++ b/bits/sigset.h @@ -0,0 +1,81 @@ +/* __sig_atomic_t, __sigset_t, and related definitions. Generic/BSD version. + Copyright (C) 1991, 1992, 1994, 1996, 1997 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. */ + +#ifndef _SIGSET_H_types +#define _SIGSET_H_types 1 + +typedef int __sig_atomic_t; + +/* A `sigset_t' has a bit for each signal. */ +typedef unsigned long int __sigset_t; + +#endif + + +/* We only want to define these functions if <signal.h> was actually + included; otherwise we were included just to define the types. Since we + are namespace-clean, it wouldn't hurt to define extra macros. But + trouble can be caused by functions being defined (e.g., any global + register vars declared later will cause compilation errors). */ + +#if !defined (_SIGSET_H_fns) && defined (_SIGNAL_H) +#define _SIGSET_H_fns 1 + +#ifndef _EXTERN_INLINE +#define _EXTERN_INLINE extern __inline +#endif + +/* Return a mask that includes SIG only. The cast to `sigset_t' avoids + overflow if `sigset_t' is wider than `int'. */ +#define __sigmask(sig) (((__sigset_t) 1) << ((sig) - 1)) + +#define __sigemptyset(set) ((*(set) = (__sigset_t) 0), 0) +#define __sigfillset(set) ((*(set) = ~(__sigset_t) 0), 0) + +#ifdef _GNU_SOURCE +# define __sigisemptyset(set) (*(set) == (__sigset_t) 0) +# define __sigandset(dest, left, right) \ + ((*(dest) = (*(left) & *(right))), 0) +# define __sigorset(dest, left, right) \ + ((*(dest) = (*(left) | *(right))), 0) +#endif + +/* These functions needn't check for a bogus signal number -- error + checking is done in the non __ versions. */ + +extern int __sigismember (__const __sigset_t *, int); +extern int __sigaddset (__sigset_t *, int); +extern int __sigdelset (__sigset_t *, int); + +#define __SIGSETFN(NAME, BODY, CONST) \ + _EXTERN_INLINE int \ + NAME (CONST __sigset_t *__set, int __sig) \ + { \ + __sigset_t __mask = __sigmask (__sig); \ + return BODY; \ + } + +__SIGSETFN (__sigismember, (*__set & __mask) ? 1 : 0, __const) +__SIGSETFN (__sigaddset, ((*__set |= __mask), 0), ) +__SIGSETFN (__sigdelset, ((*__set &= ~__mask), 0), ) + +#undef __SIGSETFN + + +#endif /* ! _SIGSET_H_fns. */ |