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diff --git a/include/mach/thread_info.h b/include/mach/thread_info.h
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+/* 
+ * Mach Operating System
+ * Copyright (c) 1991,1990,1989,1988,1987 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.
+ */
+/*
+ *	File:	mach/thread_info
+ *
+ *	Thread information structure and definitions.
+ *
+ *	The defintions in this file are exported to the user.  The kernel
+ *	will translate its internal data structures to these structures
+ *	as appropriate.
+ *
+ */
+
+#ifndef	_MACH_THREAD_INFO_H_
+#define _MACH_THREAD_INFO_H_
+
+#include <mach/boolean.h>
+#include <mach/policy.h>
+#include <mach/time_value.h>
+
+/*
+ *	Generic information structure to allow for expansion.
+ */
+typedef	integer_t	*thread_info_t;		/* varying array of ints */
+
+#define THREAD_INFO_MAX		(1024)	/* maximum array size */
+typedef	integer_t	thread_info_data_t[THREAD_INFO_MAX];
+
+/*
+ *	Currently defined information.
+ */
+#define THREAD_BASIC_INFO	1		/* basic information */
+
+struct thread_basic_info {
+	time_value_t	user_time;	/* user run time */
+	time_value_t	system_time;	/* system run time */
+	integer_t	cpu_usage;	/* scaled cpu usage percentage */
+	integer_t	base_priority;	/* base scheduling priority */
+	integer_t	cur_priority;	/* current scheduling priority */
+	integer_t	run_state;	/* run state (see below) */
+	integer_t	flags;		/* various flags (see below) */
+	integer_t	suspend_count;	/* suspend count for thread */
+	integer_t	sleep_time;	/* number of seconds that thread
+					   has been sleeping */
+};
+
+typedef struct thread_basic_info	thread_basic_info_data_t;
+typedef struct thread_basic_info	*thread_basic_info_t;
+#define THREAD_BASIC_INFO_COUNT	\
+		(sizeof(thread_basic_info_data_t) / sizeof(natural_t))
+
+/*
+ *	Scale factor for usage field.
+ */
+
+#define TH_USAGE_SCALE	1000
+
+/*
+ *	Thread run states (state field).
+ */
+
+#define TH_STATE_RUNNING	1	/* thread is running normally */
+#define TH_STATE_STOPPED	2	/* thread is stopped */
+#define TH_STATE_WAITING	3	/* thread is waiting normally */
+#define TH_STATE_UNINTERRUPTIBLE 4	/* thread is in an uninterruptible
+					   wait */
+#define TH_STATE_HALTED		5	/* thread is halted at a
+					   clean point */
+
+/*
+ *	Thread flags (flags field).
+ */
+#define TH_FLAGS_SWAPPED	0x1	/* thread is swapped out */
+#define TH_FLAGS_IDLE		0x2	/* thread is an idle thread */
+
+#define THREAD_SCHED_INFO	2
+
+struct thread_sched_info {
+	integer_t	policy;		/* scheduling policy */
+	integer_t	data;		/* associated data */
+	integer_t	base_priority;	/* base priority */
+	integer_t	max_priority;   /* max priority */
+	integer_t	cur_priority;	/* current priority */
+/*boolean_t*/integer_t	depressed;	/* depressed ? */
+	integer_t	depress_priority; /* priority depressed from */
+};
+
+typedef struct thread_sched_info	thread_sched_info_data_t;
+typedef struct thread_sched_info	*thread_sched_info_t;
+#define	THREAD_SCHED_INFO_COUNT	\
+		(sizeof(thread_sched_info_data_t) / sizeof(natural_t))
+
+#endif	/* _MACH_THREAD_INFO_H_ */