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#pragma once
#define FILE_OPTIMAL_READ_BUFFER_SIZE_VALUE (2 * 1024 * 1024)
#define FILE_OPTIMAL_WRITE_BUFFER_SIZE_VALUE (2 * 1024 * 1024)
// This class is used to store the context for a specific resource operation.
class WpdObjectResourceContext : public IUnknown
{
public:
WpdObjectResourceContext() :
m_cRef(1),
m_Resource(WPD_RESOURCE_DEFAULT),
m_BytesTransferred(0),
m_BytesTotal(0),
m_Scope(FULL_DEVICE_ACCESS)
{
}
~WpdObjectResourceContext()
{
}
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;
}
private:
DWORD m_cRef;
// WpdObjectResourceContext specific data
public:
CAtlStringW m_strObjectID; // object identifier of the object whose resource is being transferred
PROPERTYKEY m_Resource; // the specific resource being transferred
ULONGLONG m_BytesTransferred; // number of bytes transferred from the resource to the caller
ULONGLONG m_BytesTotal; // total number of bytes of the resource data
ACCESS_SCOPE m_Scope; // client access scope
};
class WpdObjectResources
{
public:
WpdObjectResources();
virtual ~WpdObjectResources();
HRESULT Initialize(_In_ FakeDevice* pDevice);
HRESULT DispatchWpdMessage(
_In_ REFPROPERTYKEY Command,
_In_ IPortableDeviceValues* pParams,
_In_ IPortableDeviceValues* pResults);
HRESULT OnGetSupportedResources(
_In_ IPortableDeviceValues* pParams,
_In_ IPortableDeviceValues* pResults);
HRESULT OnGetResourceAttributes(
_In_ IPortableDeviceValues* pParams,
_In_ IPortableDeviceValues* pResults);
HRESULT OnOpenResource(
_In_ IPortableDeviceValues* pParams,
_In_ IPortableDeviceValues* pResults);
HRESULT OnReadResource(
_In_ IPortableDeviceValues* pParams,
_In_ IPortableDeviceValues* pResults);
HRESULT OnCloseResource(
_In_ IPortableDeviceValues* pParams,
_In_ IPortableDeviceValues* pResults);
private:
FakeDevice* m_pDevice;
};
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