зеркало из https://github.com/mozilla/pjs.git
103 строки
3.2 KiB
C++
103 строки
3.2 KiB
C++
/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is the Mozilla platform.
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*
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* The Initial Developer of the Original Code is
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* Benjamin Smedberg <benjamin@smedbergs.us>.
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*
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* Portions created by the Initial Developer are Copyright (C) 2006
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* the Mozilla Foundation <http://www.mozilla.org/>. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef nsLayoutStatics_h__
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#define nsLayoutStatics_h__
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#include "nscore.h"
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#include "nsThreadUtils.h"
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// This isn't really a class, it's a namespace for static methods.
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// Documents and other objects can hold a reference to the layout static
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// objects so that they last past the xpcom-shutdown notification.
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class nsLayoutStatics
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{
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public:
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// Called by the layout module constructor. This call performs an AddRef()
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// internally.
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static nsresult Initialize();
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static void AddRef()
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{
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NS_ASSERTION(NS_IsMainThread(),
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"nsLayoutStatics reference counting must be on main thread");
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NS_ASSERTION(sLayoutStaticRefcnt,
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"nsLayoutStatics already dropped to zero!");
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++sLayoutStaticRefcnt;
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NS_LOG_ADDREF(&sLayoutStaticRefcnt, sLayoutStaticRefcnt,
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"nsLayoutStatics", 1);
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}
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static void Release()
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{
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NS_ASSERTION(NS_IsMainThread(),
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"nsLayoutStatics reference counting must be on main thread");
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--sLayoutStaticRefcnt;
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NS_LOG_RELEASE(&sLayoutStaticRefcnt, sLayoutStaticRefcnt,
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"nsLayoutStatics");
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if (!sLayoutStaticRefcnt)
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Shutdown();
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}
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private:
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// not to be called!
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nsLayoutStatics();
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static void Shutdown();
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static nsrefcnt sLayoutStaticRefcnt;
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};
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class nsLayoutStaticsRef
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{
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public:
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nsLayoutStaticsRef()
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{
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nsLayoutStatics::AddRef();
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}
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~nsLayoutStaticsRef()
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{
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nsLayoutStatics::Release();
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}
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};
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#endif // nsLayoutStatics_h__
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