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* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or
* See the License for the specific language governing permissions
* and limitations under the License.
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
#ifndef _MDB_WCB_H
#define _MDB_WCB_H
#pragma ident "%Z%%M% %I% %E% SMI"
#include <mdb/mdb_module.h>
#ifdef __cplusplus
extern "C" {
* Values for w_buftag, used as a guard to ensure that the walk state hasn't
* overflowed into the wcb. w_buftag is INITIAL when the wcb is first
* allocated, ACTIVE when added to a frame, and PASSIVE when removed.
#define WCB_TAG_INITIAL 0xcbbabecb /* Magic tag for initialized wcb */
#define WCB_TAG_ACTIVE 0xcba1cba1 /* Magic tag for active wcb */
#define WCB_TAG_PASSIVE 0xcbdeadcb /* Magic tag for inactive wcb */
struct mdb_frame; /* Forward declaration */
typedef struct mdb_wcb {
mdb_walk_state_t w_state; /* Walk soft state */
uint32_t w_buftag; /* WCB_TAG_* */
int w_inited; /* Set if we've called walk_init */
struct mdb_wcb *w_lyr_head; /* Link to head wcb in layer chain */
struct mdb_wcb *w_lyr_link; /* Link to next wcb in layer chain */
struct mdb_wcb *w_link; /* Link to next wcb in global chain */
const mdb_iwalker_t *w_walker; /* Walker corresponding to this wcb */
} mdb_wcb_t;
extern mdb_wcb_t *mdb_wcb_create(mdb_iwalker_t *, mdb_walk_cb_t,
void *, uintptr_t);
extern void mdb_wcb_destroy(mdb_wcb_t *);
extern mdb_wcb_t *mdb_wcb_from_state(mdb_walk_state_t *);
extern void mdb_wcb_insert(mdb_wcb_t *, struct mdb_frame *);
extern void mdb_wcb_delete(mdb_wcb_t *, struct mdb_frame *);
extern void mdb_wcb_purge(mdb_wcb_t **);
#ifdef __cplusplus
#endif /* _MDB_WCB_H */