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 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #ifndef _MDB_WCB_H 28 #define _MDB_WCB_H 29 30 #include <mdb/mdb_module.h> 31 32 #ifdef __cplusplus 33 extern "C" { 34 #endif 35 36 /* 37 * Values for w_buftag, used as a guard to ensure that the walk state hasn't 38 * overflowed into the wcb. w_buftag is INITIAL when the wcb is first 39 * allocated, ACTIVE when added to a frame, and PASSIVE when removed. 40 */ 41 #define WCB_TAG_INITIAL 0xcbbabecb /* Magic tag for initialized wcb */ 42 #define WCB_TAG_ACTIVE 0xcba1cba1 /* Magic tag for active wcb */ 43 #define WCB_TAG_PASSIVE 0xcbdeadcb /* Magic tag for inactive wcb */ 44 45 struct mdb_frame; /* Forward declaration */ 46 47 typedef struct mdb_wcb { 48 mdb_walk_state_t w_state; /* Walk soft state */ 49 uint32_t w_buftag; /* WCB_TAG_* */ 50 int w_inited; /* Set if we've called walk_init */ 51 struct mdb_wcb *w_lyr_head; /* Link to head wcb in layer chain */ 52 struct mdb_wcb *w_lyr_link; /* Link to next wcb in layer chain */ 53 struct mdb_wcb *w_link; /* Link to next wcb in global chain */ 54 const mdb_iwalker_t *w_walker; /* Walker corresponding to this wcb */ 55 } mdb_wcb_t; 56 57 extern mdb_wcb_t *mdb_wcb_create(mdb_iwalker_t *, mdb_walk_cb_t, 58 void *, uintptr_t); 59 60 extern void mdb_wcb_destroy(mdb_wcb_t *); 61 extern mdb_wcb_t *mdb_wcb_from_state(mdb_walk_state_t *); 62 63 extern void mdb_wcb_insert(mdb_wcb_t *, struct mdb_frame *); 64 extern void mdb_wcb_delete(mdb_wcb_t *, struct mdb_frame *); 65 extern void mdb_wcb_purge(mdb_wcb_t **); 66 67 #ifdef __cplusplus 68 } 69 #endif 70 71 #endif /* _MDB_WCB_H */ 72