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/* __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 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, 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. */
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