usr/src/cmd/mdb/common/mdb/mdb_list.h

   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 */