зеркало из https://github.com/mozilla/gecko-dev.git
65 строки
1.5 KiB
C++
65 строки
1.5 KiB
C++
/* -*- Mode: C++; tab-width: 2; 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;
|
|
|
|
// Set IMETHOD_VISIBILITY to empty so that the class-level NS_COM declaration
|
|
// controls member method visibility.
|
|
#undef IMETHOD_VISIBILITY
|
|
#define IMETHOD_VISIBILITY NS_COM_GLUE
|
|
|
|
class NS_COM_GLUE nsSupportsWeakReference : public nsISupportsWeakReference
|
|
{
|
|
public:
|
|
nsSupportsWeakReference()
|
|
: mProxy(0)
|
|
{
|
|
// nothing else to do here
|
|
}
|
|
|
|
NS_DECL_NSISUPPORTSWEAKREFERENCE
|
|
|
|
protected:
|
|
inline ~nsSupportsWeakReference();
|
|
|
|
private:
|
|
friend class nsWeakReference;
|
|
|
|
void
|
|
NoticeProxyDestruction()
|
|
// ...called (only) by an |nsWeakReference| from _its_ dtor.
|
|
{
|
|
mProxy = 0;
|
|
}
|
|
|
|
nsWeakReference* mProxy;
|
|
|
|
protected:
|
|
|
|
void ClearWeakReferences();
|
|
bool HasWeakReferences() const {return mProxy != 0;}
|
|
};
|
|
|
|
#undef IMETHOD_VISIBILITY
|
|
#define IMETHOD_VISIBILITY
|
|
|
|
inline
|
|
nsSupportsWeakReference::~nsSupportsWeakReference()
|
|
{
|
|
ClearWeakReferences();
|
|
}
|
|
|
|
#endif
|