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/* __sig_atomic_t, __sigset_t, and related definitions. Linux version.
Copyright (C) 1991, 1992, 1994, 1996, 1997, 2007, 2012
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, see
<http://www.gnu.org/licenses/>. */
#ifndef _SIGSET_H_types
# define _SIGSET_H_types 1
typedef int __sig_atomic_t;
/* A `sigset_t' has a bit for each signal. */
# define _SIGSET_NWORDS (1024 / (8 * sizeof (unsigned long int)))
typedef struct
{
unsigned long int __val[_SIGSET_NWORDS];
} __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 long int))))
/* Return the word index for SIG. */
# define __sigword(sig) (((sig) - 1) / (8 * sizeof (unsigned long int)))
# if defined __GNUC__ && __GNUC__ >= 2
# define __sigemptyset(set) \
(__extension__ ({ int __cnt = _SIGSET_NWORDS; \
sigset_t *__set = (set); \
while (--__cnt >= 0) __set->__val[__cnt] = 0; \
0; }))
# define __sigfillset(set) \
(__extension__ ({ int __cnt = _SIGSET_NWORDS; \
sigset_t *__set = (set); \
while (--__cnt >= 0) __set->__val[__cnt] = ~0UL; \
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__ ({ int __cnt = _SIGSET_NWORDS; \
const sigset_t *__set = (set); \
int __ret = __set->__val[--__cnt]; \
while (!__ret && --__cnt >= 0) \
__ret = __set->__val[__cnt]; \
__ret == 0; }))
# define __sigandset(dest, left, right) \
(__extension__ ({ int __cnt = _SIGSET_NWORDS; \
sigset_t *__dest = (dest); \
const sigset_t *__left = (left); \
const sigset_t *__right = (right); \
while (--__cnt >= 0) \
__dest->__val[__cnt] = (__left->__val[__cnt] \
& __right->__val[__cnt]); \
0; }))
# define __sigorset(dest, left, right) \
(__extension__ ({ int __cnt = _SIGSET_NWORDS; \
sigset_t *__dest = (dest); \
const sigset_t *__left = (left); \
const sigset_t *__right = (right); \
while (--__cnt >= 0) \
__dest->__val[__cnt] = (__left->__val[__cnt] \
| __right->__val[__cnt]); \
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
# define __SIGSETFN(NAME, BODY, CONST) \
_EXTERN_INLINE int \
NAME (CONST __sigset_t *__set, int __sig) \
{ \
unsigned long int __mask = __sigmask (__sig); \
unsigned long int __word = __sigword (__sig); \
return BODY; \
}
__SIGSETFN (__sigismember, (__set->__val[__word] & __mask) ? 1 : 0, const)
__SIGSETFN (__sigaddset, ((__set->__val[__word] |= __mask), 0), )
__SIGSETFN (__sigdelset, ((__set->__val[__word] &= ~__mask), 0), )
# undef __SIGSETFN
# endif
#endif /* ! _SIGSET_H_fns. */