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/*
* Mach Operating System
* Copyright (c) 1991,1990,1989 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: ipc/ipc_splay.h
* Author: Rich Draves
* Date: 1989
*
* Declarations of primitive splay tree operations.
*/
#ifndef _IPC_IPC_SPLAY_H_
#define _IPC_IPC_SPLAY_H_
#include <mach/port.h>
#include <kern/assert.h>
#include <kern/macro_help.h>
#include <ipc/ipc_entry.h>
typedef struct ipc_splay_tree {
mach_port_t ist_name; /* name used in last lookup */
ipc_tree_entry_t ist_root; /* root of middle tree */
ipc_tree_entry_t ist_ltree; /* root of left tree */
ipc_tree_entry_t *ist_ltreep; /* pointer into left tree */
ipc_tree_entry_t ist_rtree; /* root of right tree */
ipc_tree_entry_t *ist_rtreep; /* pointer into right tree */
} *ipc_splay_tree_t;
#define ist_lock(splay) /* no locking */
#define ist_unlock(splay) /* no locking */
/* Initialize a raw splay tree */
extern void ipc_splay_tree_init(
ipc_splay_tree_t splay);
/* Pick a random entry in a splay tree */
extern boolean_t ipc_splay_tree_pick(
ipc_splay_tree_t splay,
mach_port_t *namep,
ipc_tree_entry_t *entryp);
/* Find an entry in a splay tree */
extern ipc_tree_entry_t ipc_splay_tree_lookup(
ipc_splay_tree_t splay,
mach_port_t name);
/* Insert a new entry into a splay tree */
extern void ipc_splay_tree_insert(
ipc_splay_tree_t splay,
mach_port_t name,
ipc_tree_entry_t entry);
/* Delete an entry from a splay tree */
extern void ipc_splay_tree_delete(
ipc_splay_tree_t splay,
mach_port_t name,
ipc_tree_entry_t entry);
/* Split a splay tree */
extern void ipc_splay_tree_split(
ipc_splay_tree_t splay,
mach_port_t name,
ipc_splay_tree_t entry);
/* Join two splay trees */
extern void ipc_splay_tree_join(
ipc_splay_tree_t splay,
ipc_splay_tree_t small);
/* Do a bounded splay tree lookup */
extern void ipc_splay_tree_bounds(
ipc_splay_tree_t splay,
mach_port_t name,
mach_port_t *lowerp,
mach_port_t *upperp);
/* Initialize a symmetric order traversal of a splay tree */
extern ipc_tree_entry_t ipc_splay_traverse_start(
ipc_splay_tree_t splay);
/* Return the next entry in a symmetric order traversal of a splay tree */
extern ipc_tree_entry_t ipc_splay_traverse_next(
ipc_splay_tree_t splay,
boolean_t delete);
/* Terminate a symmetric order traversal of a splay tree */
extern void ipc_splay_traverse_finish(
ipc_splay_tree_t splay);
#endif /* _IPC_IPC_SPLAY_H_ */
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