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/* __sig_atomic_t, __sigset_t, and related definitions. Generic/BSD version.
Copyright (C) 1991, 1992, 1994, 1996, 1997 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 unsigned long int __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 SIG only. The cast to `sigset_t' avoids
overflow if `sigset_t' is wider than `int'. */
#define __sigmask(sig) (((__sigset_t) 1) << ((sig) - 1))
#define __sigemptyset(set) ((*(set) = (__sigset_t) 0), 0)
#define __sigfillset(set) ((*(set) = ~(__sigset_t) 0), 0)
#ifdef _GNU_SOURCE
# define __sigisemptyset(set) (*(set) == (__sigset_t) 0)
# define __sigandset(dest, left, right) \
((*(dest) = (*(left) & *(right))), 0)
# define __sigorset(dest, left, right) \
((*(dest) = (*(left) | *(right))), 0)
#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) \
{ \
__sigset_t __mask = __sigmask (__sig); \
return BODY; \
}
__SIGSETFN (__sigismember, (*__set & __mask) ? 1 : 0, __const)
__SIGSETFN (__sigaddset, ((*__set |= __mask), 0), )
__SIGSETFN (__sigdelset, ((*__set &= ~__mask), 0), )
# undef __SIGSETFN
#endif
#endif /* ! _SIGSET_H_fns. */
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