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126 lines
4.1 KiB
C
126 lines
4.1 KiB
C
/* __sig_atomic_t, __sigset_t, and related definitions. AIX version.
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Copyright (C) 1991,1992,1994,1996,1997,2000 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#ifndef _SIGSET_H_types
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# define _SIGSET_H_types 1
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typedef int __sig_atomic_t;
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/* A `sigset_t' has a bit for each signal. */
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typedef struct
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{
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unsigned int __losigs;
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unsigned int __hisigs;
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} __sigset_t;
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#endif
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/* We only want to define these functions if <signal.h> was actually
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included; otherwise we were included just to define the types. Since we
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are namespace-clean, it wouldn't hurt to define extra macros. But
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trouble can be caused by functions being defined (e.g., any global
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register vars declared later will cause compilation errors). */
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#if !defined _SIGSET_H_fns && defined _SIGNAL_H
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# define _SIGSET_H_fns 1
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# ifndef _EXTERN_INLINE
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# define _EXTERN_INLINE extern __inline
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# endif
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/* Return a mask that includes the bit for SIG only. */
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# define __sigmask(sig) \
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(((unsigned long int) 1) << (((sig) - 1) % (8 * sizeof (unsigned int))))
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# if defined __GNUC__ && __GNUC__ >= 2
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# define __sigemptyset(set) \
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(__extension__ ({ sigset_t *__set = (set); \
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__set->__losigs = __set->__hisigs = 0; \
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0; }))
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# define __sigfillset(set) \
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(__extension__ ({ sigset_t *__set = (set); \
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__set->__losigs = __set->__hisigs = ~0u; \
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0; }))
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# ifdef __USE_GNU
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/* The POSIX does not specify for handling the whole signal set in one
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command. This is often wanted and so we define three more functions
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here. */
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# define __sigisemptyset(set) \
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(__extension__ ({ const sigset_t *__set = (set); \
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(__set->__losigs | __set->__hisigs) == 0; }))
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# define __sigandset(dest, left, right) \
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(__extension__ ({ sigset_t *__dest = (dest); \
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const sigset_t *__left = (left); \
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const sigset_t *__right = (right); \
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__dest->__losigs = __left->__losigs & __right->__losigs; \
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__dest->__hisigs = __left->__hisigs & __right->__hisigs; \
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0; }))
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# define __sigorset(dest, left, right) \
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(__extension__ ({ sigset_t *__dest = (dest); \
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const sigset_t *__left = (left); \
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const sigset_t *__right = (right); \
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__dest->__losigs = __left->__losigs | __right->__losigs; \
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__dest->__hisigs = __left->__hisigs | __right->__hisigs; \
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0; }))
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# endif
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# endif
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/* These functions needn't check for a bogus signal number -- error
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checking is done in the non __ versions. */
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extern int __sigismember (__const __sigset_t *, int);
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extern int __sigaddset (__sigset_t *, int);
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extern int __sigdelset (__sigset_t *, int);
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# ifdef __USE_EXTERN_INLINES
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_EXTERN_INLINE int
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__sigismember (__const __sigset_t *__set, int __sig)
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{
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unsigned int __mask = __sigmask (__sig);
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return ((__sig < 33 ? __set->__losigs : __set->__hisigs) & __mask ) ? 1 : 0;
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}
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_EXTERN_INLINE int
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__sigaddset (__sigset_t *__set, int __sig)
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{
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unsigned int __mask = __sigmask (__sig);
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(__sig < 33 ? __set->__losigs : __set->__hisigs) |= __mask;
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return 0;
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}
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_EXTERN_INLINE int
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__sigdelset (__sigset_t *__set, int __sig)
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{
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unsigned int __mask = __sigmask (__sig);
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(__sig < 33 ? __set->__losigs : __set->__hisigs) &= ~__mask;
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return 0;
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}
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# endif
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#endif /* ! _SIGSET_H_fns. */
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