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+/* 
+ * Mach Operating System
+ * Copyright (c) 1993-1988 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.
+ */
+/*
+ *	File:	task.h
+ *	Author:	Avadis Tevanian, Jr.
+ *
+ *	This file contains the structure definitions for tasks.
+ *
+ */
+
+#ifndef	_KERN_TASK_H_
+#define _KERN_TASK_H_
+
+#include <norma_task.h>
+#include <fast_tas.h>
+#include <net_atm.h>
+
+#include <mach/boolean.h>
+#include <mach/port.h>
+#include <mach/time_value.h>
+#include <mach/mach_param.h>
+#include <mach/task_info.h>
+#include <kern/kern_types.h>
+#include <kern/lock.h>
+#include <kern/queue.h>
+#include <kern/pc_sample.h>
+#include <kern/processor.h>
+#include <kern/syscall_emulation.h>
+#include <vm/vm_map.h>
+
+#if	NET_ATM
+typedef struct nw_ep_owned {
+  unsigned int ep;
+  struct nw_ep_owned *next;
+} nw_ep_owned_s, *nw_ep_owned_t;
+#endif
+
+struct task {
+	/* Synchronization/destruction information */
+	decl_simple_lock_data(,lock)	/* Task's lock */
+	int		ref_count;	/* Number of references to me */
+	boolean_t	active;		/* Task has not been terminated */
+
+	/* Miscellaneous */
+	vm_map_t	map;		/* Address space description */
+	queue_chain_t	pset_tasks;	/* list of tasks assigned to pset */
+	int		suspend_count;	/* Internal scheduling only */
+
+	/* Thread information */
+	queue_head_t	thread_list;	/* list of threads */
+	int		thread_count;	/* number of threads */
+	processor_set_t	processor_set;	/* processor set for new threads */
+	boolean_t	may_assign;	/* can assigned pset be changed? */
+	boolean_t	assign_active;	/* waiting for may_assign */
+
+	/* User-visible scheduling information */
+	int		user_stop_count;	/* outstanding stops */
+	int		priority;		/* for new threads */
+
+	/* Statistics */
+	time_value_t	total_user_time;
+				/* total user time for dead threads */
+	time_value_t	total_system_time;
+				/* total system time for dead threads */
+
+	/* IPC structures */
+	decl_simple_lock_data(, itk_lock_data)
+	struct ipc_port *itk_self;	/* not a right, doesn't hold ref */
+	struct ipc_port *itk_sself;	/* a send right */
+	struct ipc_port *itk_exception;	/* a send right */
+	struct ipc_port *itk_bootstrap;	/* a send right */
+	struct ipc_port *itk_registered[TASK_PORT_REGISTER_MAX];
+					/* all send rights */
+
+	struct ipc_space *itk_space;
+
+	/* User space system call emulation support */
+	struct 	eml_dispatch	*eml_dispatch;
+
+	sample_control_t pc_sample;
+
+#if	NORMA_TASK
+	long		child_node;	/* if != -1, node for new children */
+#endif	/* NORMA_TASK */
+
+#if	FAST_TAS
+#define TASK_FAST_TAS_NRAS	8	
+	vm_offset_t	fast_tas_base[TASK_FAST_TAS_NRAS];
+	vm_offset_t	fast_tas_end[TASK_FAST_TAS_NRAS];
+#endif	/* FAST_TAS */
+
+#if	NET_ATM
+	nw_ep_owned_t   nw_ep_owned;
+#endif	/* NET_ATM */
+};
+
+#define task_lock(task)		simple_lock(&(task)->lock)
+#define task_unlock(task)	simple_unlock(&(task)->lock)
+
+#define	itk_lock_init(task)	simple_lock_init(&(task)->itk_lock_data)
+#define	itk_lock(task)		simple_lock(&(task)->itk_lock_data)
+#define	itk_unlock(task)	simple_unlock(&(task)->itk_lock_data)
+
+/*
+ *	Exported routines/macros
+ */
+
+extern kern_return_t	task_create(
+	task_t		parent_task,
+	boolean_t	inherit_memory,
+	task_t		*child_task);
+extern kern_return_t	task_terminate(
+	task_t		task);
+extern kern_return_t	task_suspend(
+	task_t		task);
+extern kern_return_t	task_resume(
+	task_t		task);
+extern kern_return_t	task_threads(
+	task_t		task,
+	thread_array_t	*thread_list,
+	natural_t	*count);
+extern kern_return_t	task_info(
+	task_t		task,
+	int		flavor,
+	task_info_t	task_info_out,
+	natural_t	*task_info_count);
+extern kern_return_t	task_get_special_port(
+	task_t		task,
+	int		which,
+	struct ipc_port	**portp);
+extern kern_return_t	task_set_special_port(
+	task_t		task,
+	int		which,
+	struct ipc_port	*port);
+extern kern_return_t	task_assign(
+	task_t		task,
+	processor_set_t	new_pset,
+	boolean_t	assign_threads);
+extern kern_return_t	task_assign_default(
+	task_t		task,
+	boolean_t	assign_threads);
+
+/*
+ *	Internal only routines
+ */
+
+extern void		task_init();
+extern void		task_reference();
+extern void		task_deallocate();
+extern kern_return_t	task_hold();
+extern kern_return_t	task_dowait();
+extern kern_return_t	task_release();
+extern kern_return_t	task_halt();
+
+extern kern_return_t	task_suspend_nowait();
+extern task_t		kernel_task_create();
+
+extern task_t	kernel_task;
+
+#endif	_KERN_TASK_H_