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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_CONNECTIONPOINT_H_
#define _JMSOFFICECOMM_CONNECTIONPOINT_H_
#include <ocidl.h>
#include <olectl.h>
#include <stdint.h>
#include "UnknownImpl.h"
template <class T, REFIID IID_T>
class ConnectionPoint
: public IConnectionPoint,
public T
{
public:
ConnectionPoint(IConnectionPointContainer *container)
: _container(container),
_sinkCount(0),
_sinks(NULL)
{
}
virtual ~ConnectionPoint()
{
if (_sinks)
::free(_sinks);
}
// IUnknown
STDMETHODIMP QueryInterface(REFIID iid, PVOID *obj)
{
HRESULT hr;
if (!obj)
hr = E_POINTER;
else if (IID_IUnknown == iid)
{
AddRef();
*obj
= static_cast<LPUNKNOWN>(
static_cast<IConnectionPoint *>(this));
hr = S_OK;
}
else if (IID_IConnectionPoint == iid)
{
AddRef();
*obj = static_cast<IConnectionPoint *>(this);
hr = S_OK;
}
else
{
*obj = NULL;
hr = E_NOINTERFACE;
}
return hr;
}
STDMETHODIMP_(ULONG) AddRef() { return _container->AddRef(); }
STDMETHODIMP_(ULONG) Release() { return _container->Release(); }
// IDispatch
STDMETHODIMP GetTypeInfoCount(UINT *)
STDMETHODIMP_E_NOTIMPL_STUB
STDMETHODIMP GetTypeInfo(UINT, LCID, LPTYPEINFO *)
STDMETHODIMP_E_NOTIMPL_STUB
STDMETHODIMP GetIDsOfNames(REFIID, LPOLESTR *, UINT, LCID, DISPID *)
STDMETHODIMP_E_NOTIMPL_STUB
STDMETHODIMP Invoke(DISPID, REFIID, LCID, WORD, DISPPARAMS *, VARIANT *, EXCEPINFO *, UINT *)
STDMETHODIMP_E_NOTIMPL_STUB
// IConnectionPoint
STDMETHODIMP GetConnectionInterface(IID *pIID)
{
HRESULT hr;
if (pIID)
{
*pIID = IID_T;
hr = S_OK;
}
else
hr = E_POINTER;
return hr;
}
STDMETHODIMP GetConnectionPointContainer(IConnectionPointContainer **ppCPC)
{
HRESULT hr;
if (ppCPC)
{
_container->AddRef();
*ppCPC = _container;
hr = S_OK;
}
else
hr = E_POINTER;
return hr;
}
STDMETHODIMP Advise(IUnknown *pUnkSink, DWORD *pdwCookie)
{
HRESULT hr;
if (pdwCookie)
{
if (pUnkSink)
{
T *t;
if (SUCCEEDED(
pUnkSink->QueryInterface(IID_T, (PVOID *) &t)))
{
LPDISPATCH iDispatch;
if (SUCCEEDED(
t->QueryInterface(
IID_IDispatch,
(PVOID *) &iDispatch)))
{
if (addSink(iDispatch))
{
*pdwCookie
= (DWORD)
(((intptr_t) iDispatch) & 0xffffffff);
hr = S_OK;
}
else
{
*pdwCookie = 0;
hr = CONNECT_E_CANNOTCONNECT;
}
iDispatch->Release();
}
else
{
*pdwCookie = 0;
hr = CONNECT_E_CANNOTCONNECT;
}
t->Release();
}
else
{
*pdwCookie = 0;
hr = CONNECT_E_CANNOTCONNECT;
}
}
else
{
*pdwCookie = 0;
hr = E_POINTER;
}
}
else
hr = E_POINTER;
return hr;
}
STDMETHODIMP Unadvise(DWORD dwCookie)
{
size_t i = 0;
LPDISPATCH *ptr = _sinks;
HRESULT hr = E_POINTER;
for (; i < _sinkCount; i++, ptr++)
{
LPDISPATCH iDispatch = *ptr;
if (iDispatch
&& (dwCookie
== (DWORD)
(((intptr_t) iDispatch) & 0xffffffff)))
{
*ptr = NULL;
iDispatch->Release();
_sinkCount--;
/*
* Move the emptied slot of the _sinks storage at the end
* where it is not accessible given the value of _sinkCount.
* Its memory is retained but it will either be used during
* a subsequent addSink(LPDISPATCH) or be freed upon
* deleting this ConnectionPoint.
*/
for (; i < _sinkCount; i++)
{
LPDISPATCH *nextPtr = ptr + 1;
*ptr = *nextPtr;
ptr = nextPtr;
}
hr = S_OK;
break;
}
}
return hr;
}
STDMETHODIMP EnumConnections(IEnumConnections **ppEnum)
STDMETHODIMP_E_NOTIMPL_STUB
protected:
HRESULT Invoke(DISPID dispIdMember, DISPPARAMS *pDispParams)
{
LPDISPATCH *sinks = getSinks();
HRESULT hr;
if (sinks)
{
for (LPDISPATCH sink, *sinkIt = sinks;
(sink = *sinkIt);
sinkIt++)
{
hr
= sink->Invoke(
dispIdMember,
IID_NULL,
0,
DISPATCH_METHOD,
pDispParams,
NULL,
NULL,
NULL);
sink->Release();
}
::free(sinks);
hr = S_OK;
}
else
hr = E_OUTOFMEMORY;
return hr;
}
private:
BOOL addSink(LPDISPATCH sink)
{
BOOL b;
if (containsSink(sink))
b = FALSE;
else
{
size_t newSinkCount = _sinkCount + 1;
LPDISPATCH *newSinks
= (LPDISPATCH *)
::realloc(_sinks, newSinkCount * sizeof(LPDISPATCH));
if (newSinks)
{
sink->AddRef();
newSinks[newSinkCount - 1] = sink;
_sinkCount = newSinkCount;
_sinks = newSinks;
b = TRUE;
}
else
b = FALSE;
}
return b;
}
BOOL containsSink(const LPDISPATCH sink)
{
size_t i = 0;
LPDISPATCH *ptr = _sinks;
for (; i < _sinkCount; i++, ptr++)
if (sink == *ptr)
return TRUE;
return FALSE;
}
LPDISPATCH *getSinks()
{
LPDISPATCH *sinks
= (LPDISPATCH *)
::malloc((_sinkCount + 1) * sizeof(LPDISPATCH));
if (sinks)
{
size_t i = 0;
LPDISPATCH *dst = sinks;
LPDISPATCH *src = _sinks;
for (; i < _sinkCount; i++, src++, dst++)
{
LPDISPATCH sink = *src;
sink->AddRef();
*dst = sink;
}
*dst = NULL;
}
return sinks;
}
IConnectionPointContainer *_container;
size_t _sinkCount;
LPDISPATCH *_sinks;
};
#endif /* #ifndef _JMSOFFICECOMM_CONNECTIONPOINT_H_ */
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