49 lines
1.1 KiB
C++
49 lines
1.1 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#ifndef nsWeakReference_h__
|
|
#define nsWeakReference_h__
|
|
|
|
// nsWeakReference.h
|
|
|
|
// See mfbt/WeakPtr.h for a more typesafe C++ implementation of weak references
|
|
|
|
#include "nsIWeakReferenceUtils.h"
|
|
|
|
class nsWeakReference;
|
|
|
|
class nsSupportsWeakReference : public nsISupportsWeakReference
|
|
{
|
|
public:
|
|
nsSupportsWeakReference() : mProxy(0) {}
|
|
|
|
NS_DECL_NSISUPPORTSWEAKREFERENCE
|
|
|
|
protected:
|
|
inline ~nsSupportsWeakReference();
|
|
|
|
private:
|
|
friend class nsWeakReference;
|
|
|
|
// Called (only) by an |nsWeakReference| from _its_ dtor.
|
|
// The thread safety check is made by the caller.
|
|
void NoticeProxyDestruction() { mProxy = nullptr; }
|
|
|
|
nsWeakReference* MOZ_NON_OWNING_REF mProxy;
|
|
|
|
protected:
|
|
|
|
void ClearWeakReferences();
|
|
bool HasWeakReferences() const { return !!mProxy; }
|
|
};
|
|
|
|
inline
|
|
nsSupportsWeakReference::~nsSupportsWeakReference()
|
|
{
|
|
ClearWeakReferences();
|
|
}
|
|
|
|
#endif
|