From 28f540f45bbacd939bfd07f213bcad2bf730b1bf Mon Sep 17 00:00:00 2001
From: Roland McGrath <roland@gnu.org>
Date: Sat, 18 Feb 1995 01:27:10 +0000
Subject: initial import

---
 sysdeps/generic/sigset.h | 79 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 79 insertions(+)
 create mode 100644 sysdeps/generic/sigset.h

(limited to 'sysdeps/generic/sigset.h')

diff --git a/sysdeps/generic/sigset.h b/sysdeps/generic/sigset.h
new file mode 100644
index 0000000000..bc56d96daf
--- /dev/null
+++ b/sysdeps/generic/sigset.h
@@ -0,0 +1,79 @@
+/* __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.  */
-- 
cgit 1.4.1