mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-17 18:40:14 +00:00
80 lines
2.9 KiB
C
80 lines
2.9 KiB
C
/* __sig_atomic_t, __sigset_t, and related definitions. Generic/BSD version.
|
|
Copyright (C) 1991, 1992, 1994 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, 1992 Free Software Foundation, Inc., 675 Mass Ave,
|
|
Cambridge, MA 02139, 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
|
|
|
|
/* 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)
|
|
|
|
/* These functions must check for a bogus signal number. We detect it by a
|
|
zero sigmask, since a number too low or too high will have shifted the 1
|
|
off the high end of the mask. If we find an error, we punt to a random
|
|
call we know fails with EINVAL (kludge city!), so as to avoid referring
|
|
to `errno' in this file (sigh). */
|
|
|
|
#ifndef _EXTERN_INLINE
|
|
#define _EXTERN_INLINE extern __inline
|
|
#endif
|
|
#define __SIGSETFN(NAME, BODY, CONST) \
|
|
_EXTERN_INLINE int \
|
|
__##NAME (CONST __sigset_t *__set, int __sig) \
|
|
{ \
|
|
if (__sig < 1 || __sig > sizeof (__sigset_t) * 8) \
|
|
{ \
|
|
extern int raise (int); \
|
|
return raise (-1); \
|
|
} \
|
|
else \
|
|
{ \
|
|
__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 /* ! _SIGSET_H_fns. */
|