mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-22 13:00:06 +00:00
85 lines
2.9 KiB
C
85 lines
2.9 KiB
C
/* __sig_atomic_t, __sigset_t, and related definitions. Generic/BSD 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, 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. */
|