projects / apple / xnu.git / blame
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1 | /* |
| 2 | * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. | |
| 3 | * | |
| 4 | * @APPLE_LICENSE_HEADER_START@ | |
| 5 | * | |
| ff6e181a A |
6 | * This file contains Original Code and/or Modifications of Original Code |
| 7 | * as defined in and that are subject to the Apple Public Source License | |
| 8 | * Version 2.0 (the 'License'). You may not use this file except in | |
| 9 | * compliance with the License. Please obtain a copy of the License at | |
| 10 | * http://www.opensource.apple.com/apsl/ and read it before using this | |
| 11 | * file. | |
| 1c79356b | 12 | * |
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13 | * The Original Code and all software distributed under the License are |
| 14 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER | |
| 1c79356b A |
15 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| 16 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| ff6e181a A |
17 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
| 18 | * Please see the License for the specific language governing rights and | |
| 19 | * limitations under the License. | |
| 1c79356b A |
20 | * |
| 21 | * @APPLE_LICENSE_HEADER_END@ | |
| 22 | */ | |
| 23 | /* | |
| 24 | * @OSF_COPYRIGHT@ | |
| 25 | */ | |
| 26 | /* | |
| 27 | * Mach Operating System | |
| 28 | * Copyright (c) 1991,1990,1989 Carnegie Mellon University | |
| 29 | * All Rights Reserved. | |
| 30 | * | |
| 31 | * Permission to use, copy, modify and distribute this software and its | |
| 32 | * documentation is hereby granted, provided that both the copyright | |
| 33 | * notice and this permission notice appear in all copies of the | |
| 34 | * software, derivative works or modified versions, and any portions | |
| 35 | * thereof, and that both notices appear in supporting documentation. | |
| 36 | * | |
| 37 | * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" | |
| 38 | * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR | |
| 39 | * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. | |
| 40 | * | |
| 41 | * Carnegie Mellon requests users of this software to return to | |
| 42 | * | |
| 43 | * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU | |
| 44 | * School of Computer Science | |
| 45 | * Carnegie Mellon University | |
| 46 | * Pittsburgh PA 15213-3890 | |
| 47 | * | |
| 48 | * any improvements or extensions that they make and grant Carnegie Mellon | |
| 49 | * the rights to redistribute these changes. | |
| 50 | */ | |
| 51 | /* | |
| 52 | */ | |
| 53 | /* | |
| 54 | * File: ipc/ipc_splay.h | |
| 55 | * Author: Rich Draves | |
| 56 | * Date: 1989 | |
| 57 | * | |
| 58 | * Declarations of primitive splay tree operations. | |
| 59 | */ | |
| 60 | ||
| 61 | #ifndef _IPC_IPC_SPLAY_H_ | |
| 62 | #define _IPC_IPC_SPLAY_H_ | |
| 63 | ||
| 64 | #include <mach/port.h> | |
| 65 | #include <kern/assert.h> | |
| 66 | #include <kern/macro_help.h> | |
| 67 | #include <ipc/ipc_entry.h> | |
| 68 | ||
| 69 | typedef struct ipc_splay_tree { | |
| 70 | mach_port_name_t ist_name; /* name used in last lookup */ | |
| 71 | ipc_tree_entry_t ist_root; /* root of middle tree */ | |
| 72 | ipc_tree_entry_t ist_ltree; /* root of left tree */ | |
| 73 | ipc_tree_entry_t *ist_ltreep; /* pointer into left tree */ | |
| 74 | ipc_tree_entry_t ist_rtree; /* root of right tree */ | |
| 75 | ipc_tree_entry_t *ist_rtreep; /* pointer into right tree */ | |
| 76 | } *ipc_splay_tree_t; | |
| 77 | ||
| 78 | #define ist_lock(splay) /* no locking */ | |
| 79 | #define ist_unlock(splay) /* no locking */ | |
| 80 | ||
| 81 | /* Initialize a raw splay tree */ | |
| 82 | extern void ipc_splay_tree_init( | |
| 83 | ipc_splay_tree_t splay); | |
| 84 | ||
| 85 | /* Pick a random entry in a splay tree */ | |
| 86 | extern boolean_t ipc_splay_tree_pick( | |
| 87 | ipc_splay_tree_t splay, | |
| 88 | mach_port_name_t *namep, | |
| 89 | ipc_tree_entry_t *entryp); | |
| 90 | ||
| 91 | /* Find an entry in a splay tree */ | |
| 92 | extern ipc_tree_entry_t ipc_splay_tree_lookup( | |
| 93 | ipc_splay_tree_t splay, | |
| 94 | mach_port_name_t name); | |
| 95 | ||
| 96 | /* Insert a new entry into a splay tree */ | |
| 97 | extern void ipc_splay_tree_insert( | |
| 98 | ipc_splay_tree_t splay, | |
| 99 | mach_port_name_t name, | |
| 100 | ipc_tree_entry_t entry); | |
| 101 | ||
| 102 | /* Delete an entry from a splay tree */ | |
| 103 | extern void ipc_splay_tree_delete( | |
| 104 | ipc_splay_tree_t splay, | |
| 105 | mach_port_name_t name, | |
| 106 | ipc_tree_entry_t entry); | |
| 107 | ||
| 108 | /* Split a splay tree */ | |
| 109 | extern void ipc_splay_tree_split( | |
| 110 | ipc_splay_tree_t splay, | |
| 111 | mach_port_name_t name, | |
| 112 | ipc_splay_tree_t entry); | |
| 113 | ||
| 114 | /* Join two splay trees */ | |
| 115 | extern void ipc_splay_tree_join( | |
| 116 | ipc_splay_tree_t splay, | |
| 117 | ipc_splay_tree_t small); | |
| 118 | ||
| 119 | /* Do a bounded splay tree lookup */ | |
| 120 | extern void ipc_splay_tree_bounds( | |
| 121 | ipc_splay_tree_t splay, | |
| 122 | mach_port_name_t name, | |
| 123 | mach_port_name_t *lowerp, | |
| 124 | mach_port_name_t *upperp); | |
| 125 | ||
| 126 | /* Initialize a symmetric order traversal of a splay tree */ | |
| 127 | extern ipc_tree_entry_t ipc_splay_traverse_start( | |
| 128 | ipc_splay_tree_t splay); | |
| 129 | ||
| 130 | /* Return the next entry in a symmetric order traversal of a splay tree */ | |
| 131 | extern ipc_tree_entry_t ipc_splay_traverse_next( | |
| 132 | ipc_splay_tree_t splay, | |
| 133 | boolean_t delete); | |
| 134 | ||
| 135 | /* Terminate a symmetric order traversal of a splay tree */ | |
| 136 | extern void ipc_splay_traverse_finish( | |
| 137 | ipc_splay_tree_t splay); | |
| 138 | ||
| 139 | #endif /* _IPC_IPC_SPLAY_H_ */ |