prclist.h
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- /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
- /* ***** BEGIN LICENSE BLOCK *****
- * Version: MPL 1.1/GPL 2.0/LGPL 2.1
- *
- * The contents of this file are subject to the Mozilla Public License Version
- * 1.1 (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- * http://www.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
- * for the specific language governing rights and limitations under the
- * License.
- *
- * The Original Code is the Netscape Portable Runtime (NSPR).
- *
- * The Initial Developer of the Original Code is
- * Netscape Communications Corporation.
- * Portions created by the Initial Developer are Copyright (C) 1998-2000
- * the Initial Developer. All Rights Reserved.
- *
- * Contributor(s):
- *
- * Alternatively, the contents of this file may be used under the terms of
- * either the GNU General Public License Version 2 or later (the "GPL"), or
- * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
- * in which case the provisions of the GPL or the LGPL are applicable instead
- * of those above. If you wish to allow use of your version of this file only
- * under the terms of either the GPL or the LGPL, and not to allow others to
- * use your version of this file under the terms of the MPL, indicate your
- * decision by deleting the provisions above and replace them with the notice
- * and other provisions required by the GPL or the LGPL. If you do not delete
- * the provisions above, a recipient may use your version of this file under
- * the terms of any one of the MPL, the GPL or the LGPL.
- *
- * ***** END LICENSE BLOCK ***** */
- #ifndef prclist_h___
- #define prclist_h___
- #include "prtypes.h"
- typedef struct PRCListStr PRCList;
- /*
- ** Circular linked list
- */
- struct PRCListStr {
- PRCList *next;
- PRCList *prev;
- };
- /*
- ** Insert element "_e" into the list, before "_l".
- */
- #define PR_INSERT_BEFORE(_e,_l)
- PR_BEGIN_MACRO
- (_e)->next = (_l);
- (_e)->prev = (_l)->prev;
- (_l)->prev->next = (_e);
- (_l)->prev = (_e);
- PR_END_MACRO
- /*
- ** Insert element "_e" into the list, after "_l".
- */
- #define PR_INSERT_AFTER(_e,_l)
- PR_BEGIN_MACRO
- (_e)->next = (_l)->next;
- (_e)->prev = (_l);
- (_l)->next->prev = (_e);
- (_l)->next = (_e);
- PR_END_MACRO
- /*
- ** Return the element following element "_e"
- */
- #define PR_NEXT_LINK(_e)
- ((_e)->next)
- /*
- ** Return the element preceding element "_e"
- */
- #define PR_PREV_LINK(_e)
- ((_e)->prev)
- /*
- ** Append an element "_e" to the end of the list "_l"
- */
- #define PR_APPEND_LINK(_e,_l) PR_INSERT_BEFORE(_e,_l)
- /*
- ** Insert an element "_e" at the head of the list "_l"
- */
- #define PR_INSERT_LINK(_e,_l) PR_INSERT_AFTER(_e,_l)
- /* Return the head/tail of the list */
- #define PR_LIST_HEAD(_l) (_l)->next
- #define PR_LIST_TAIL(_l) (_l)->prev
- /*
- ** Remove the element "_e" from it's circular list.
- */
- #define PR_REMOVE_LINK(_e)
- PR_BEGIN_MACRO
- (_e)->prev->next = (_e)->next;
- (_e)->next->prev = (_e)->prev;
- PR_END_MACRO
- /*
- ** Remove the element "_e" from it's circular list. Also initializes the
- ** linkage.
- */
- #define PR_REMOVE_AND_INIT_LINK(_e)
- PR_BEGIN_MACRO
- (_e)->prev->next = (_e)->next;
- (_e)->next->prev = (_e)->prev;
- (_e)->next = (_e);
- (_e)->prev = (_e);
- PR_END_MACRO
- /*
- ** Return non-zero if the given circular list "_l" is empty, zero if the
- ** circular list is not empty
- */
- #define PR_CLIST_IS_EMPTY(_l)
- ((_l)->next == (_l))
- /*
- ** Initialize a circular list
- */
- #define PR_INIT_CLIST(_l)
- PR_BEGIN_MACRO
- (_l)->next = (_l);
- (_l)->prev = (_l);
- PR_END_MACRO
- #define PR_INIT_STATIC_CLIST(_l)
- {(_l), (_l)}
- #endif /* prclist_h___ */