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      1 /*
      2  * CDDL HEADER START
      3  *
      4  * The contents of this file are subject to the terms of the
      5  * Common Development and Distribution License, Version 1.0 only
      6  * (the "License").  You may not use this file except in compliance
      7  * with the License.
      8  *
      9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
     10  * or http://www.opensolaris.org/os/licensing.
     11  * See the License for the specific language governing permissions
     12  * and limitations under the License.
     13  *
     14  * When distributing Covered Code, include this CDDL HEADER in each
     15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     16  * If applicable, add the following below this CDDL HEADER, with the
     17  * fields enclosed by brackets "[]" replaced with your own identifying
     18  * information: Portions Copyright [yyyy] [name of copyright owner]
     19  *
     20  * CDDL HEADER END
     21  */
     22 /*
     23  * Copyright (c) 1999 by Sun Microsystems, Inc.
     24  * All rights reserved.
     25  */
     26 
     27 #ifndef	_MDB_LIST_H
     28 #define	_MDB_LIST_H
     29 
     30 #pragma ident	"%Z%%M%	%I%	%E% SMI"
     31 
     32 #ifdef	__cplusplus
     33 extern "C" {
     34 #endif
     35 
     36 #ifdef _MDB
     37 
     38 /*
     39  * Simple doubly-linked list implementation.  This implementation assumes that
     40  * each element contains an embedded mdb_list_t structure.  An additional
     41  * mdb_list_t is used to store the head and tail pointers.  The caller can
     42  * use mdb_list_prev() on the master list_t to obtain the tail element, or
     43  * mdb_list_next() to obtain the head element.  The head and tail list elements
     44  * have their previous and next pointers set to NULL, respectively.
     45  */
     46 
     47 typedef struct mdb_list {
     48 	struct mdb_list *ml_prev;	/* Link to previous list element */
     49 	struct mdb_list *ml_next;	/* Link to next list element */
     50 } mdb_list_t;
     51 
     52 #define	mdb_list_prev(elem)	((void *)(((mdb_list_t *)(elem))->ml_prev))
     53 #define	mdb_list_next(elem)	((void *)(((mdb_list_t *)(elem))->ml_next))
     54 
     55 extern void mdb_list_append(mdb_list_t *, void *);
     56 extern void mdb_list_prepend(mdb_list_t *, void *);
     57 extern void mdb_list_insert(mdb_list_t *, void *, void *);
     58 extern void mdb_list_delete(mdb_list_t *, void *);
     59 extern void mdb_list_move(mdb_list_t *, mdb_list_t *);
     60 
     61 #endif	/* _MDB */
     62 
     63 #ifdef	__cplusplus
     64 }
     65 #endif
     66 
     67 #endif	/* _MDB_LIST_H */
     68