зеркало из https://github.com/mozilla/gecko-dev.git
57 строки
1.7 KiB
C++
57 строки
1.7 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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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 "MainThreadUtils.h"
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#include "nsISupportsImpl.h"
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#include "nsDebug.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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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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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, "nsLayoutStatics",
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1);
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}
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static void Release() {
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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) 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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#endif // nsLayoutStatics_h__
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