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Annotation of OSKit-Mach/ipc/ipc_splay.h, revision 1.1

1.1     ! root        1: /* 
        !             2:  * Mach Operating System
        !             3:  * Copyright (c) 1991,1990,1989 Carnegie Mellon University
        !             4:  * All Rights Reserved.
        !             5:  * 
        !             6:  * Permission to use, copy, modify and distribute this software and its
        !             7:  * documentation is hereby granted, provided that both the copyright
        !             8:  * notice and this permission notice appear in all copies of the
        !             9:  * software, derivative works or modified versions, and any portions
        !            10:  * thereof, and that both notices appear in supporting documentation.
        !            11:  * 
        !            12:  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
        !            13:  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
        !            14:  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
        !            15:  * 
        !            16:  * Carnegie Mellon requests users of this software to return to
        !            17:  * 
        !            18:  *  Software Distribution Coordinator  or  [email protected]
        !            19:  *  School of Computer Science
        !            20:  *  Carnegie Mellon University
        !            21:  *  Pittsburgh PA 15213-3890
        !            22:  * 
        !            23:  * any improvements or extensions that they make and grant Carnegie Mellon
        !            24:  * the rights to redistribute these changes.
        !            25:  */
        !            26: /*
        !            27:  */
        !            28: /*
        !            29:  *     File:   ipc/ipc_splay.h
        !            30:  *     Author: Rich Draves
        !            31:  *     Date:   1989
        !            32:  *
        !            33:  *     Declarations of primitive splay tree operations.
        !            34:  */
        !            35: 
        !            36: #ifndef        _IPC_IPC_SPLAY_H_
        !            37: #define _IPC_IPC_SPLAY_H_
        !            38: 
        !            39: #include <mach/port.h>
        !            40: #include <kern/assert.h>
        !            41: #include <kern/macro_help.h>
        !            42: #include <ipc/ipc_entry.h>
        !            43: 
        !            44: typedef struct ipc_splay_tree {
        !            45:        mach_port_t ist_name;           /* name used in last lookup */
        !            46:        ipc_tree_entry_t ist_root;      /* root of middle tree */
        !            47:        ipc_tree_entry_t ist_ltree;     /* root of left tree */
        !            48:        ipc_tree_entry_t *ist_ltreep;   /* pointer into left tree */
        !            49:        ipc_tree_entry_t ist_rtree;     /* root of right tree */
        !            50:        ipc_tree_entry_t *ist_rtreep;   /* pointer into right tree */
        !            51: } *ipc_splay_tree_t;
        !            52: 
        !            53: #define        ist_lock(splay)         /* no locking */
        !            54: #define ist_unlock(splay)      /* no locking */
        !            55: 
        !            56: /* Initialize a raw splay tree */
        !            57: extern void ipc_splay_tree_init(
        !            58:        ipc_splay_tree_t        splay);
        !            59: 
        !            60: /* Pick a random entry in a splay tree */
        !            61: extern boolean_t ipc_splay_tree_pick(
        !            62:        ipc_splay_tree_t        splay,
        !            63:        mach_port_t             *namep,
        !            64:        ipc_tree_entry_t        *entryp);
        !            65: 
        !            66: /* Find an entry in a splay tree */
        !            67: extern ipc_tree_entry_t ipc_splay_tree_lookup(
        !            68:        ipc_splay_tree_t        splay,
        !            69:        mach_port_t             name);
        !            70: 
        !            71: /* Insert a new entry into a splay tree */
        !            72: extern void ipc_splay_tree_insert(
        !            73:        ipc_splay_tree_t        splay,
        !            74:        mach_port_t             name,
        !            75:        ipc_tree_entry_t        entry);
        !            76: 
        !            77: /* Delete an entry from a splay tree */
        !            78: extern void ipc_splay_tree_delete(
        !            79:        ipc_splay_tree_t        splay,
        !            80:        mach_port_t             name,
        !            81:        ipc_tree_entry_t        entry);
        !            82: 
        !            83: /* Split a splay tree */
        !            84: extern void ipc_splay_tree_split(
        !            85:        ipc_splay_tree_t        splay,
        !            86:        mach_port_t             name,
        !            87:        ipc_splay_tree_t        entry);
        !            88: 
        !            89: /* Join two splay trees */
        !            90: extern void ipc_splay_tree_join(
        !            91:        ipc_splay_tree_t        splay,
        !            92:        ipc_splay_tree_t        small);
        !            93: 
        !            94: /* Do a bounded splay tree lookup */
        !            95: extern void ipc_splay_tree_bounds(
        !            96:        ipc_splay_tree_t        splay,
        !            97:        mach_port_t             name,
        !            98:        mach_port_t             *lowerp, 
        !            99:        mach_port_t             *upperp);
        !           100: 
        !           101: /* Initialize a symmetric order traversal of a splay tree */
        !           102: extern ipc_tree_entry_t ipc_splay_traverse_start(
        !           103:        ipc_splay_tree_t        splay);
        !           104: 
        !           105: /* Return the next entry in a symmetric order traversal of a splay tree */
        !           106: extern ipc_tree_entry_t ipc_splay_traverse_next(
        !           107:        ipc_splay_tree_t        splay,
        !           108:        boolean_t               delete);
        !           109: 
        !           110: /* Terminate a symmetric order traversal of a splay tree */
        !           111: extern void ipc_splay_traverse_finish(
        !           112:        ipc_splay_tree_t        splay);
        !           113: 
        !           114: #endif /* _IPC_IPC_SPLAY_H_ */

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