--- /dev/null
+/* __sig_atomic_t, __sigset_t, and related definitions. AIX version.
+ Copyright (C) 1991,1992,1994,1996,1997,2000 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 int __losigs;
+ unsigned int __hisigs;
+ } __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 the bit for SIG only. */
+# define __sigmask(sig) \
+ (((unsigned long int) 1) << (((sig) - 1) % (8 * sizeof (unsigned int))))
+
+# if defined __GNUC__ && __GNUC__ >= 2
+# define __sigemptyset(set) \
+ (__extension__ ({ sigset_t *__set = (set); \
+ __set->__losigs = __set->__hisigs = 0; \
+ 0; }))
+# define __sigfillset(set) \
+ (__extension__ ({ sigset_t *__set = (set); \
+ __set->__losigs = __set->__hisigs = ~0u; \
+ 0; }))
+
+# ifdef __USE_GNU
+/* The POSIX does not specify for handling the whole signal set in one
+ command. This is often wanted and so we define three more functions
+ here. */
+# define __sigisemptyset(set) \
+ (__extension__ ({ const sigset_t *__set = (set); \
+ (__set->__losigs | __set->__hisigs) == 0; }))
+# define __sigandset(dest, left, right) \
+ (__extension__ ({ sigset_t *__dest = (dest); \
+ const sigset_t *__left = (left); \
+ const sigset_t *__right = (right); \
+ __dest->__losigs = __left->__losigs & __right->__losigs; \
+ __dest->__hisigs = __left->__hisigs & __right->__hisigs; \
+ 0; }))
+# define __sigorset(dest, left, right) \
+ (__extension__ ({ sigset_t *__dest = (dest); \
+ const sigset_t *__left = (left); \
+ const sigset_t *__right = (right); \
+ __dest->__losigs = __left->__losigs | __right->__losigs; \
+ __dest->__hisigs = __left->__hisigs | __right->__hisigs; \
+ 0; }))
+# endif
+# 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
+_EXTERN_INLINE int
+__sigismember (__const __sigset_t *__set, int __sig)
+{
+ unsigned int __mask = __sigmask (__sig);
+
+ return ((__sig < 33 ? __set->__losigs : __set->__hisigs) & __mask ) ? 1 : 0;
+}
+
+_EXTERN_INLINE int
+__sigaddset (__sigset_t *__set, int __sig)
+{
+ unsigned int __mask = __sigmask (__sig);
+
+ (__sig < 33 ? __set->__losigs : __set->__hisigs) |= __mask;
+
+ return 0;
+}
+
+_EXTERN_INLINE int
+__sigdelset (__sigset_t *__set, int __sig)
+{
+ unsigned int __mask = __sigmask (__sig);
+
+ (__sig < 33 ? __set->__losigs : __set->__hisigs) &= ~__mask;
+
+ return 0;
+}
+# endif
+
+
+#endif /* ! _SIGSET_H_fns. */