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84 lines
2.9 KiB
C
84 lines
2.9 KiB
C
/* __sig_atomic_t, __sigset_t, and related definitions. Generic/BSD version.
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Copyright (C) 1991, 1992, 1994, 1996, 1997 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#ifndef _SIGSET_H_types
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#define _SIGSET_H_types 1
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typedef int __sig_atomic_t;
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/* A `sigset_t' has a bit for each signal. */
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typedef unsigned long int __sigset_t;
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#endif
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/* We only want to define these functions if <signal.h> was actually
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included; otherwise we were included just to define the types. Since we
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are namespace-clean, it wouldn't hurt to define extra macros. But
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trouble can be caused by functions being defined (e.g., any global
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register vars declared later will cause compilation errors). */
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#if !defined _SIGSET_H_fns && defined _SIGNAL_H
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#define _SIGSET_H_fns 1
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#ifndef _EXTERN_INLINE
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# define _EXTERN_INLINE extern __inline
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#endif
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/* Return a mask that includes SIG only. The cast to `sigset_t' avoids
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overflow if `sigset_t' is wider than `int'. */
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#define __sigmask(sig) (((__sigset_t) 1) << ((sig) - 1))
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#define __sigemptyset(set) ((*(set) = (__sigset_t) 0), 0)
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#define __sigfillset(set) ((*(set) = ~(__sigset_t) 0), 0)
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#ifdef _GNU_SOURCE
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# define __sigisemptyset(set) (*(set) == (__sigset_t) 0)
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# define __sigandset(dest, left, right) \
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((*(dest) = (*(left) & *(right))), 0)
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# define __sigorset(dest, left, right) \
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((*(dest) = (*(left) | *(right))), 0)
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#endif
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/* These functions needn't check for a bogus signal number -- error
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checking is done in the non __ versions. */
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extern int __sigismember (__const __sigset_t *, int);
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extern int __sigaddset (__sigset_t *, int);
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extern int __sigdelset (__sigset_t *, int);
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#ifdef __USE_EXTERN_INLINES
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# define __SIGSETFN(NAME, BODY, CONST) \
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_EXTERN_INLINE int \
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NAME (CONST __sigset_t *__set, int __sig) \
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{ \
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__sigset_t __mask = __sigmask (__sig); \
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return BODY; \
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}
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__SIGSETFN (__sigismember, (*__set & __mask) ? 1 : 0, __const)
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__SIGSETFN (__sigaddset, ((*__set |= __mask), 0), )
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__SIGSETFN (__sigdelset, ((*__set &= ~__mask), 0), )
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# undef __SIGSETFN
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#endif
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#endif /* ! _SIGSET_H_fns. */
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