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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_UNKNOWNIMPL_H_
#define _JMSOFFICECOMM_UNKNOWNIMPL_H_
#include "Log.h"
#include "OutOfProcessServer.h"
#include "StringUtils.h"
#include "WeakReferenceSource.h"
#define STDMETHODIMP_E_NOTIMPL_STUB \
{ \
Log::d(_T("%s\n"), __PRETTY_FUNCTION__); \
return E_NOTIMPL; \
}
/**
* Represents a base implementation of the <tt>IUnknown</tt> interface.
*
* @author Lyubomir Marinov
*/
template <class T, REFIID IID_T>
class UnknownImpl
: public T
{
public:
// IUnknown
STDMETHODIMP QueryInterface(REFIID iid, PVOID *obj)
{
HRESULT hr;
if (!obj)
hr = E_POINTER;
else if (IID_IUnknown == iid)
{
AddRef();
*obj = static_cast<LPUNKNOWN>(this);
hr = S_OK;
}
else if (IID_T == iid)
{
AddRef();
*obj = static_cast<T *>(this);
hr = S_OK;
}
else if (IID_IWeakReferenceSource == iid)
{
if (!_weakReferenceSource)
_weakReferenceSource = new WeakReferenceSource(this);
_weakReferenceSource->AddRef();
*obj = static_cast<IWeakReferenceSource *>(_weakReferenceSource);
hr = S_OK;
}
else
{
*obj = NULL;
hr = E_NOINTERFACE;
}
if (FAILED(hr))
{
LPOLESTR olestr;
if (SUCCEEDED(::StringFromIID(iid, &olestr)))
{
LPTSTR tstr
#ifdef _UNICODE
= olestr;
#else
= StringUtils::WideCharToMultiByte(olestr);
#endif /* #ifdef _UNICODE */
if (tstr)
{
Log::d(
_T("UnknownImpl::QueryInterface: this=%p; iid=%s;\n"),
(PVOID) this,
tstr);
if (tstr != olestr)
::free(tstr);
}
::CoTaskMemFree(olestr);
}
}
return hr;
}
STDMETHODIMP_(ULONG) AddRef() { return ++_refCount; }
STDMETHODIMP_(ULONG) Release()
{
ULONG refCount = --_refCount;
if (!refCount)
delete this;
Log::d(
_T("UnknownImpl::Release: this=%p; refCount=%lu;\n"),
(PVOID) this,
refCount);
return refCount;
}
protected:
UnknownImpl()
: _refCount(1),
_weakReferenceSource(NULL)
{
OutOfProcessServer::addRef();
}
virtual ~UnknownImpl()
{
if (_weakReferenceSource)
delete _weakReferenceSource;
OutOfProcessServer::release();
}
private:
ULONG _refCount;
WeakReferenceSource *_weakReferenceSource;
};
#endif /* #ifndef _JMSOFFICECOMM_UNKNOWNIMPL_H_ */
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