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/*
* Jitsi, the OpenSource Java VoIP and Instant Messaging client.
*
* Distributable under LGPL license.
* See terms of license at gnu.org.
*/
#ifndef _JMSOFFICECOMM_WEAKREFERENCESOURCE_H_
#define _JMSOFFICECOMM_WEAKREFERENCESOURCE_H_
#include "IWeakReferenceSource.h"
class WeakReference;
class WeakReferenceSource
: public IWeakReferenceSource
{
public:
WeakReferenceSource(LPUNKNOWN iUnknown)
: _iUnknown(iUnknown), _weakReference(NULL) {}
virtual ~WeakReferenceSource();
// IUnknown
STDMETHODIMP QueryInterface(REFIID iid, PVOID *obj)
{ return _iUnknown->QueryInterface(iid, obj); }
STDMETHODIMP_(ULONG) AddRef()
{ return _iUnknown->AddRef(); }
STDMETHODIMP_(ULONG) Release()
{ return _iUnknown->Release(); }
// IWeakReferenceSource
STDMETHODIMP GetWeakReference(IWeakReference **weakReference);
private:
const LPUNKNOWN _iUnknown;
WeakReference *_weakReference;
};
#define STDMETHODIMP_RESOLVE_WEAKREFERENCE_OR_NEW(out,weakReference,clazz,...) \
{ \
HRESULT hr; \
\
if (out) \
{ \
hr = E_FAIL; \
if (weakReference) \
{ \
hr = weakReference->Resolve(IID_IDispatch, (PVOID *) out); \
if (FAILED(hr) && (E_NOINTERFACE != hr)) \
{ \
weakReference->Release(); \
weakReference = NULL; \
} \
} \
if (FAILED(hr) && (E_NOINTERFACE != hr)) \
{ \
clazz *obj = new clazz(__VA_ARGS__); \
IWeakReferenceSource *weakReferenceSource; \
\
hr \
= obj->QueryInterface( \
IID_IWeakReferenceSource, \
(PVOID *) &weakReferenceSource); \
obj->Release(); \
if (SUCCEEDED(hr)) \
{ \
hr \
= weakReferenceSource->GetWeakReference( \
&weakReference); \
if (SUCCEEDED(hr)) \
{ \
hr \
= weakReference->Resolve( \
IID_IDispatch, \
(PVOID *) out); \
} \
else \
*out = NULL; \
weakReferenceSource->Release(); \
} \
else \
*out = NULL; \
} \
} \
else \
hr = RPC_X_NULL_REF_POINTER; \
return hr; \
}
#endif /* #ifndef _JMSOFFICECOMM_WEAKREFERENCESOURCE_H_ */
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