diff options
Diffstat (limited to 'sysdeps/unix/sysv/aix/bits/sigset.h')
| -rw-r--r-- | sysdeps/unix/sysv/aix/bits/sigset.h | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/aix/bits/sigset.h b/sysdeps/unix/sysv/aix/bits/sigset.h new file mode 100644 index 0000000000..4735796259 --- /dev/null +++ b/sysdeps/unix/sysv/aix/bits/sigset.h @@ -0,0 +1,125 @@ +/* __sig_atomic_t, __sigset_t, and related definitions. AIX version. + Copyright (C) 1991,1992,1994,1996,1997,2000 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 struct + { + unsigned int __losigs; + unsigned int __hisigs; + } __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 the bit for SIG only. */ +# define __sigmask(sig) \ + (((unsigned long int) 1) << (((sig) - 1) % (8 * sizeof (unsigned int)))) + +# if defined __GNUC__ && __GNUC__ >= 2 +# define __sigemptyset(set) \ + (__extension__ ({ sigset_t *__set = (set); \ + __set->__losigs = __set->__hisigs = 0; \ + 0; })) +# define __sigfillset(set) \ + (__extension__ ({ sigset_t *__set = (set); \ + __set->__losigs = __set->__hisigs = ~0u; \ + 0; })) + +# ifdef __USE_GNU +/* The POSIX does not specify for handling the whole signal set in one + command. This is often wanted and so we define three more functions + here. */ +# define __sigisemptyset(set) \ + (__extension__ ({ const sigset_t *__set = (set); \ + (__set->__losigs | __set->__hisigs) == 0; })) +# define __sigandset(dest, left, right) \ + (__extension__ ({ sigset_t *__dest = (dest); \ + const sigset_t *__left = (left); \ + const sigset_t *__right = (right); \ + __dest->__losigs = __left->__losigs & __right->__losigs; \ + __dest->__hisigs = __left->__hisigs & __right->__hisigs; \ + 0; })) +# define __sigorset(dest, left, right) \ + (__extension__ ({ sigset_t *__dest = (dest); \ + const sigset_t *__left = (left); \ + const sigset_t *__right = (right); \ + __dest->__losigs = __left->__losigs | __right->__losigs; \ + __dest->__hisigs = __left->__hisigs | __right->__hisigs; \ + 0; })) +# endif +# 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); + +# ifdef __USE_EXTERN_INLINES +_EXTERN_INLINE int +__sigismember (__const __sigset_t *__set, int __sig) +{ + unsigned int __mask = __sigmask (__sig); + + return ((__sig < 33 ? __set->__losigs : __set->__hisigs) & __mask ) ? 1 : 0; +} + +_EXTERN_INLINE int +__sigaddset (__sigset_t *__set, int __sig) +{ + unsigned int __mask = __sigmask (__sig); + + (__sig < 33 ? __set->__losigs : __set->__hisigs) |= __mask; + + return 0; +} + +_EXTERN_INLINE int +__sigdelset (__sigset_t *__set, int __sig) +{ + unsigned int __mask = __sigmask (__sig); + + (__sig < 33 ? __set->__losigs : __set->__hisigs) &= ~__mask; + + return 0; +} +# endif + + +#endif /* ! _SIGSET_H_fns. */ |