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#pragma once
// This class is used to store the context for a specific enumeration.
// Currrently, this is done by storing the object index.
class EnumContext : public IUnknown
{
public:
EnumContext() :
m_cRef(1),
SearchIndex(0)
{
}
~EnumContext()
{
}
public: // IUnknown
ULONG __stdcall AddRef()
{
InterlockedIncrement((long*) &m_cRef);
return m_cRef;
}
_At_(this, __drv_freesMem(Mem))
ULONG __stdcall Release()
{
ULONG ulRefCount = m_cRef - 1;
if (InterlockedDecrement((long*) &m_cRef) == 0)
{
delete this;
return 0;
}
return ulRefCount;
}
HRESULT __stdcall QueryInterface(
REFIID riid,
void** ppv)
{
HRESULT hr = S_OK;
if(riid == IID_IUnknown)
{
*ppv = static_cast<IUnknown*>(this);
AddRef();
}
else
{
*ppv = NULL;
hr = E_NOINTERFACE;
}
return hr;
}
public:
DWORD SearchIndex;
CAtlStringW ParentID;
private:
DWORD m_cRef;
};
class WpdObjectEnumerator
{
public:
WpdObjectEnumerator();
~WpdObjectEnumerator();
HRESULT Initialize(_In_ FakeDevice *pFakeDevice);
HRESULT DispatchWpdMessage(_In_ REFPROPERTYKEY Command,
_In_ IPortableDeviceValues* pParams,
_In_ IPortableDeviceValues* pResults);
HRESULT OnStartFind(_In_ IPortableDeviceValues* pParams,
_In_ IPortableDeviceValues* pResults);
HRESULT OnFindNext(_In_ IPortableDeviceValues* pParams,
_In_ IPortableDeviceValues* pResults);
HRESULT OnEndFind(_In_ IPortableDeviceValues* pParams,
_In_ IPortableDeviceValues* pResults);
private:
HRESULT CreateEnumContext(
_In_ ContextMap* pContextMap,
_In_ LPCWSTR pszParentID,
_Outptr_result_nullonfailure_ LPWSTR* ppszEnumContext);
HRESULT DestroyEnumContext(
_In_ ContextMap* pContextMap,
_In_ LPCWSTR pszEnumContext);
HRESULT GetObjectIDs(
_In_ ContextMap* pContextMap,
_In_ const DWORD dwNumObjects,
_In_ LPCWSTR pszEnumContext,
_COM_Outptr_ IPortableDevicePropVariantCollection** ppCollection);
FakeDevice* m_pFakeDevice;
};
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