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644f4e96df
This patch also replaces the usage of nsISupportsWeakReference in RasterImage as an example. --HG-- extra : rebase_source : ac6a039dcc3227a04ac4c2221f38856bb308c695
65 lines
1.5 KiB
C++
65 lines
1.5 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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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 nsWeakReference_h__
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#define nsWeakReference_h__
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// nsWeakReference.h
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// See mfbt/WeakPtr.h for a more typesafe C++ implementation of weak references
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#include "nsIWeakReferenceUtils.h"
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class nsWeakReference;
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// Set IMETHOD_VISIBILITY to empty so that the class-level NS_COM declaration
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// controls member method visibility.
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#undef IMETHOD_VISIBILITY
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#define IMETHOD_VISIBILITY NS_COM_GLUE
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class NS_COM_GLUE nsSupportsWeakReference : public nsISupportsWeakReference
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{
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public:
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nsSupportsWeakReference()
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: mProxy(0)
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{
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// nothing else to do here
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}
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NS_DECL_NSISUPPORTSWEAKREFERENCE
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protected:
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inline ~nsSupportsWeakReference();
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private:
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friend class nsWeakReference;
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void
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NoticeProxyDestruction()
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// ...called (only) by an |nsWeakReference| from _its_ dtor.
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{
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mProxy = 0;
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}
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nsWeakReference* mProxy;
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protected:
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void ClearWeakReferences();
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bool HasWeakReferences() const {return mProxy != 0;}
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};
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#undef IMETHOD_VISIBILITY
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#define IMETHOD_VISIBILITY NS_VISIBILITY_HIDDEN
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inline
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nsSupportsWeakReference::~nsSupportsWeakReference()
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{
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ClearWeakReferences();
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}
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#endif
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