mirror of
git://sourceware.org/git/glibc.git
synced 2024-12-27 04:41:02 +08:00
99 lines
3.0 KiB
C
99 lines
3.0 KiB
C
/* __sig_atomic_t, __sigset_t, and related definitions. SVR4 version.
|
|
Copyright (C) 1994, 1995, 1996 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 Library General Public License as
|
|
published by the Free Software Foundation; either version 2 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
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. 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 struct
|
|
{
|
|
unsigned long int __sigbits[4];
|
|
} __sigset_t;
|
|
|
|
#endif /* ! _SIGSET_H_types */
|
|
|
|
/* 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
|
|
|
|
/* Return a mask that includes SIG only. */
|
|
#define __sigmask(sig) (1 << ((sig) - 1))
|
|
|
|
|
|
/* It's easier to assume 8-bit bytes than to get CHAR_BIT. */
|
|
#define __NSSBITS (sizeof (__sigset_t) * 8)
|
|
#define __SSELT(s) ((s) / __NSSBITS)
|
|
#define __SSMASK(s) (1 << ((s) % __NSSBITS))
|
|
|
|
#ifdef __USE_EXTERN_INLINES
|
|
# ifndef _EXTERN_INLINE
|
|
# define _EXTERN_INLINE extern __inline
|
|
# endif
|
|
|
|
_EXTERN_INLINE int
|
|
__sigemptyset (__sigset_t *__set)
|
|
{
|
|
__set->__sigbits[0] = __set->__sigbits[1] =
|
|
__set->__sigbits[2] = __set->__sigbits[3] = 0L;
|
|
return 0;
|
|
}
|
|
|
|
_EXTERN_INLINE int
|
|
__sigfillset (__sigset_t *__set)
|
|
{
|
|
/* SVR4 has a system call for `sigfillset' (!), and it only sets the bits
|
|
for signals [1,31]. Setting bits for unimplemented signals seems
|
|
harmless (and we will find out if it really is). */
|
|
__set->__sigbits[0] = __set->__sigbits[1] =
|
|
__set->__sigbits[2] = __set->__sigbits[3] = ~0L;
|
|
return 0;
|
|
}
|
|
|
|
_EXTERN_INLINE int
|
|
__sigaddset (__sigset_t *__set, int __sig)
|
|
{
|
|
__set->__sigbits[__SSELT (__sig)] |= __SSMASK (__sig);
|
|
return 0;
|
|
}
|
|
|
|
_EXTERN_INLINE int
|
|
__sigdelset (__sigset_t *__set, int __sig)
|
|
{
|
|
__set->__sigbits[__SSELT (__sig)] &= ~__SSMASK (__sig);
|
|
return 0;
|
|
}
|
|
|
|
_EXTERN_INLINE int
|
|
__sigismember (__const __sigset_t *__set, int __sig)
|
|
{
|
|
if (__set->__sigbits[__SSELT (__sig)] & __SSMASK (__sig))
|
|
return 1;
|
|
return 0;
|
|
}
|
|
#endif /* use extern inlines. */
|
|
|
|
#endif /* ! _SIGSET_H_fns */
|