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diff --git a/lib/isc/win32/include/isc/win32os.h b/lib/isc/win32/include/isc/win32os.h
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+/*
+ * Copyright (C) 2004, 2007 Internet Systems Consortium, Inc. ("ISC")
+ * Copyright (C) 2002 Internet Software Consortium.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
+ * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/* $Id: win32os.h,v 1.5 2007/06/19 23:47:20 tbox Exp $ */
+
+#ifndef ISC_WIN32OS_H
+#define ISC_WIN32OS_H 1
+
+#include <isc/lang.h>
+
+ISC_LANG_BEGINDECLS
+
+/*
+ * Return the number of CPUs available on the system, or 1 if this cannot
+ * be determined.
+ */
+
+unsigned int
+isc_win32os_majorversion(void);
+/*
+ * Major Version of the O/S.
+ */
+
+unsigned int
+isc_win32os_minorversion(void);
+/*
+ * Minor Version of the O/S.
+ */
+
+unsigned int
+isc_win32os_servicepackmajor(void);
+/*
+ * Major Version of the Service Pack for O/S.
+ */
+
+unsigned int
+isc_win32os_servicepackminor(void);
+/*
+ * Minor Version of the Service Pack for O/S.
+ */
+
+int
+isc_win32os_versioncheck(unsigned int major, unsigned int minor,
+ unsigned int updatemajor, unsigned int updateminor);
+
+/*
+ * Checks the current version of the operating system with the
+ * supplied version information.
+ * Returns:
+ * -1 if less than the version information supplied
+ * 0 if equal to all of the version information supplied
+ * +1 if greater than the version information supplied
+ */
+
+ISC_LANG_ENDDECLS
+
+#endif /* ISC_OS_H */