[WDF] Add Windows Driver Framework files

Takern from Microsoft GitHub repo:
d9c6040fe9

Licensed under MIT

sdk/lib/drivers/wdf/shared/inc/private/common/fxrequestcontext.hpp

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+/*++
+
+Copyright (c) Microsoft Corporation.  All rights reserved.
+
+Module Name:
+
+    FxRequestContext.hpp
+
+Abstract:
+
+    Defines the base structure for contexts associated with FxRequest
+
+Author:
+
+
+
+Environment:
+
+    Both kernel and user mode
+
+Revision History:
+
+--*/
+
+#ifndef _FXREQUESTCONTEXT_H_
+#define _FXREQUESTCONTEXT_H_
+
+typedef UCHAR FX_REQUEST_CONTEXT_TYPE;
+
+//
+// IO_STACK_LOCATION::Parameters.Others.Argument3 is taken up by the IOCTL
+// value, so there are only 3
+//
+#define FX_REQUEST_NUM_OTHER_PARAMS (3)
+
+//
+// Here are all the derivations off of FxRequestContext
+//
+// FxIoContext
+// FxInternalIoctlOthersContext
+// FxUsbRequestContext
+//   +FxUsbDeviceVendorContext
+//   +FxUsbDeviceStatusContext
+//   +FxUsbDeviceFeatureContext
+//   +FxUsbPipeTransferContext
+//   +FxUsbUrbContext
+//   +FxUsbPipeRequestContext
+//   +FxUsbPipeControlTransferContext
+//
+
+typedef struct _FxInternalIoctlParams{
+    WDFMEMORY  Argument1;
+    WDFMEMORY  Argument2;
+    WDFMEMORY  Argument4;
+}FxInternalIoctlParams,*pFxInternalIoctlParams;
+
+struct FxRequestContext : public FxStump {
+
+    FxRequestContext(
+        __in FX_REQUEST_CONTEXT_TYPE Type
+        );
+
+    virtual
+    ~FxRequestContext(
+        VOID
+        );
+
+    virtual
+    VOID
+    Dispose(
+        VOID
+        )
+    {}
+
+    virtual
+    VOID
+    StoreAndReferenceMemory(
+        __in FxRequestBuffer* Buffer
+        );
+
+    virtual
+    VOID
+    ReleaseAndRestore(
+        __in FxRequestBase* Request
+        );
+
+    __inline
+    BOOLEAN
+    IsType(
+        __in FX_REQUEST_CONTEXT_TYPE Type
+        )
+    {
+        return m_RequestType == Type;
+    }
+
+    virtual
+    VOID
+    CopyParameters(
+        __in FxRequestBase* Request
+        )
+    {
+        UNREFERENCED_PARAMETER(Request);
+    }
+
+    VOID
+    FormatWriteParams(
+        __in_opt IFxMemory* WriteMemory,
+        __in_opt PWDFMEMORY_OFFSET WriteOffsets
+        );
+
+    VOID
+    FormatReadParams(
+        __in_opt IFxMemory* ReadMemory,
+        __in_opt PWDFMEMORY_OFFSET ReadOffsets
+        );
+
+    VOID
+    FormatOtherParams(
+        __in FxInternalIoctlParams *InternalIoctlParams
+        );
+
+protected:
+    static
+    VOID
+    _StoreAndReferenceMemoryWorker(
+        __in PVOID Tag,
+        __deref_out_opt IFxMemory** PPMemory,
+        __in FxRequestBuffer* Buffer
+        );
+
+    VOID
+    __inline
+    InitCompletionParams(
+        VOID
+        )
+    {
+        WDF_REQUEST_COMPLETION_PARAMS_INIT(&m_CompletionParams);
+        m_CompletionParams.Type = WdfRequestTypeNoFormat;
+    }
+
+public:
+    WDF_REQUEST_COMPLETION_PARAMS m_CompletionParams;
+
+    //
+    // Memory associated with the context that will be released when the
+    // FxRequestBase has been completed by the target.
+    //
+    IFxMemory* m_RequestMemory;
+
+    //
+    // RTTI replacement
+    //
+    FX_REQUEST_CONTEXT_TYPE m_RequestType;
+};
+
+#endif // _FXREQUESTCONTEXT_H_