1 files changed, 96 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/sysv4/bits/sigset.h b/sysdeps/unix/sysv/sysv4/bits/sigset.h
new file mode 100644
index 0000000000..1461c93b3d
--- /dev/null
+++ b/sysdeps/unix/sysv/sysv4/bits/sigset.h
@@ -0,0 +1,96 @@
+/* __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))
+
+#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 /* ! _SIGSET_H_fns */