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/*********************************************************
* Copyright (C) 1998 VMware, Inc. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation version 2.1 and no later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the Lesser GNU General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
*********************************************************/
/*
* dbllnklst.h --
*
* Double linked lists
*/
#ifndef _DBLLNKLST_H_
#define _DBLLNKLST_H_
#include "vm_basic_types.h"
#define INCLUDE_ALLOW_MODULE
#define INCLUDE_ALLOW_USERLEVEL
#include "includeCheck.h"
#define DblLnkLst_OffsetOf(type, field) ((intptr_t)&((type *)0)->field)
#define DblLnkLst_Container(addr, type, field) \
((type *)((char *)addr - DblLnkLst_OffsetOf(type, field)))
#define DblLnkLst_ForEach(curr, head) \
for (curr = (head)->next; curr != (head); curr = (curr)->next)
/* Safe from list element removal within loop body. */
#define DblLnkLst_ForEachSafe(curr, nextElem, head) \
for (curr = (head)->next, nextElem = (curr)->next; \
curr != (head); \
curr = nextElem, nextElem = (curr)->next)
typedef struct DblLnkLst_Links {
struct DblLnkLst_Links *prev;
struct DblLnkLst_Links *next;
} DblLnkLst_Links;
/* Functions for both circular and anchored lists. --hpreg */
void DblLnkLst_Init(DblLnkLst_Links *l);
void DblLnkLst_Link(DblLnkLst_Links *l1, DblLnkLst_Links *l2);
void DblLnkLst_Unlink(DblLnkLst_Links *l1, DblLnkLst_Links *l2);
void DblLnkLst_Unlink1(DblLnkLst_Links *l);
Bool DblLnkLst_IsLinked(DblLnkLst_Links const *l);
/* Functions specific to anchored lists. --hpreg */
void DblLnkLst_LinkFirst(DblLnkLst_Links *head, DblLnkLst_Links *l);
void DblLnkLst_LinkLast(DblLnkLst_Links *head, DblLnkLst_Links *l);
#endif /* _DBLLNKLST_H_ */
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