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Diffstat (limited to '')
-rw-r--r-- | src/libs/xpcom18a4/nsprpub/pr/include/prclist.h | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/src/libs/xpcom18a4/nsprpub/pr/include/prclist.h b/src/libs/xpcom18a4/nsprpub/pr/include/prclist.h new file mode 100644 index 00000000..1680ac17 --- /dev/null +++ b/src/libs/xpcom18a4/nsprpub/pr/include/prclist.h @@ -0,0 +1,140 @@ +/* -*- 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___ */ |