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41bdb6e20c
2001-07-06 Paul Eggert <eggert@twinsun.com> * manual/argp.texi: Remove ignored LGPL copyright notice; it's not appropriate for documentation anyway. * manual/libc-texinfo.sh: "Library General Public License" -> "Lesser General Public License". 2001-07-06 Andreas Jaeger <aj@suse.de> * All files under GPL/LGPL version 2: Place under LGPL version 2.1.
126 lines
4.5 KiB
C
126 lines
4.5 KiB
C
/* __sig_atomic_t, __sigset_t, and related definitions. Linux version.
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Copyright (C) 1991, 1992, 1994, 1996, 1997 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 Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the 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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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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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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# define _SIGSET_NWORDS (1024 / (8 * sizeof (unsigned long int)))
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typedef struct
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{
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unsigned long int __val[_SIGSET_NWORDS];
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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 long int))))
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/* Return the word index for SIG. */
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# define __sigword(sig) (((sig) - 1) / (8 * sizeof (unsigned long int)))
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# if defined __GNUC__ && __GNUC__ >= 2
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# define __sigemptyset(set) \
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(__extension__ ({ int __cnt = _SIGSET_NWORDS; \
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sigset_t *__set = (set); \
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while (--__cnt >= 0) __set->__val[__cnt] = 0; \
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0; }))
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# define __sigfillset(set) \
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(__extension__ ({ int __cnt = _SIGSET_NWORDS; \
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sigset_t *__set = (set); \
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while (--__cnt >= 0) __set->__val[__cnt] = ~0UL; \
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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__ ({ int __cnt = _SIGSET_NWORDS; \
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const sigset_t *__set = (set); \
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int __ret = __set->__val[--__cnt]; \
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while (!__ret && --__cnt >= 0) \
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__ret = __set->__val[__cnt]; \
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__ret == 0; }))
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# define __sigandset(dest, left, right) \
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(__extension__ ({ int __cnt = _SIGSET_NWORDS; \
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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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while (--__cnt >= 0) \
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__dest->__val[__cnt] = (__left->__val[__cnt] \
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& __right->__val[__cnt]); \
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0; }))
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# define __sigorset(dest, left, right) \
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(__extension__ ({ int __cnt = _SIGSET_NWORDS; \
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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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while (--__cnt >= 0) \
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__dest->__val[__cnt] = (__left->__val[__cnt] \
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| __right->__val[__cnt]); \
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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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# define __SIGSETFN(NAME, BODY, CONST) \
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_EXTERN_INLINE int \
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NAME (CONST __sigset_t *__set, int __sig) \
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{ \
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unsigned long int __mask = __sigmask (__sig); \
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unsigned long int __word = __sigword (__sig); \
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return BODY; \
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}
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__SIGSETFN (__sigismember, (__set->__val[__word] & __mask) ? 1 : 0, __const)
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__SIGSETFN (__sigaddset, ((__set->__val[__word] |= __mask), 0), )
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__SIGSETFN (__sigdelset, ((__set->__val[__word] &= ~__mask), 0), )
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# undef __SIGSETFN
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# endif
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#endif /* ! _SIGSET_H_fns. */
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