[WDF] Add Windows Driver Framework files

Takern from Microsoft GitHub repo:
d9c6040fe9

Licensed under MIT

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

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+
+/*++
+
+Copyright (c) Microsoft. All rights reserved.
+
+Module Name:
+
+    FxUserObject.hpp
+
+Abstract:
+
+    This module implements the user object that device
+    driver writers can use to take advantage of the
+    driver frameworks infrastructure.
+
+Author:
+
+
+
+
+Environment:
+
+    Both kernel and user mode
+
+Revision History:
+
+
+        Made mode agnostic
+
+--*/
+
+#ifndef _FXUSEROBJECT_H_
+#define _FXUSEROBJECT_H_
+
+class FxUserObject : public FxNonPagedObject {
+
+private:
+
+public:
+
+    static
+    _Must_inspect_result_
+    NTSTATUS
+    _Create(
+        __in     PFX_DRIVER_GLOBALS FxDriverGlobals,
+        __in_opt PWDF_OBJECT_ATTRIBUTES Attributes,
+        __out    FxUserObject** Object
+        );
+
+    FxUserObject(
+        __in PFX_DRIVER_GLOBALS FxDriverGlobals
+        );
+
+    virtual
+    NTSTATUS
+    QueryInterface(
+        __in FxQueryInterfaceParams* Params
+        )
+    {
+        switch (Params->Type) {
+        case FX_TYPE_USEROBJECT:
+             *Params->Object = (FxUserObject*) this;
+             break;
+
+        default:
+            return __super::QueryInterface(Params);
+        }
+
+        return STATUS_SUCCESS;
+    }
+
+    __inline
+    WDFOBJECT
+    GetHandle(
+        VOID
+        )
+    {
+        return (WDFOBJECT) GetObjectHandle();
+    }
+
+private:
+
+#ifdef INLINE_WRAPPER_ALLOCATION
+#if (FX_CORE_MODE==FX_CORE_USER_MODE)
+    static
+    USHORT
+    GetWrapperSize(
+        VOID
+        );
+
+public:
+    FORCEINLINE
+    PVOID
+    GetCOMWrapper(
+        VOID
+        )
+    {
+        PBYTE ptr = (PBYTE) this;
+        return (ptr + (USHORT) WDF_ALIGN_SIZE_UP(sizeof(*this), MEMORY_ALLOCATION_ALIGNMENT));
+    }
+#endif
+#endif
+};
+
+#endif // _FXUSEROBJECT_H_
+