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+/*
+ * Mach Operating System
+ * Copyright (c) 1991,1990,1989,1988 Carnegie Mellon University
+ * All Rights Reserved.
+ *
+ * Permission to use, copy, modify and distribute this software and its
+ * documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ *
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
+ * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ *
+ * Carnegie Mellon requests users of this software to return to
+ *
+ * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
+ * School of Computer Science
+ * Carnegie Mellon University
+ * Pittsburgh PA 15213-3890
+ *
+ * any improvements or extensions that they make and grant Carnegie Mellon
+ * the rights to redistribute these changes.
+ */
+
+#ifndef _MACH_POLICY_H_
+#define _MACH_POLICY_H_
+
+/*
+ * mach/policy.h
+ *
+ * Definitions for scheduing policy.
+ */
+
+/*
+ * Policy definitions. Policies must be powers of 2.
+ */
+#define POLICY_TIMESHARE 1
+#define POLICY_FIXEDPRI 2
+#define POLICY_LAST 2
+
+#define invalid_policy(policy) (((policy) <= 0) || ((policy) > POLICY_LAST))
+
+#endif /* _MACH_POLICY_H_ */