[WDF] Add Windows Driver Framework files

Takern from Microsoft GitHub repo:
d9c6040fe9

Licensed under MIT

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

@@ -0,0 +1,136 @@
+/*++
+
+Copyright (c) Microsoft Corporation
+
+Module Name:
+
+    FxCallback.hpp
+
+Abstract:
+
+    This represents a delegate object base class for
+    calling back into the driver.
+
+Author:
+
+
+
+
+Revision History:
+
+--*/
+
+#ifndef _FXCALLBACK_H_
+#define _FXCALLBACK_H_
+
+extern "C" {
+#if defined(EVENT_TRACING)
+#include "FxCallback.hpp.tmh"
+#endif
+}
+
+class FxCallback  {
+
+public:
+
+    FxCallback(
+        __in_opt PFX_DRIVER_GLOBALS FxDriverGlobals = NULL
+        )
+    {
+        UNREFERENCED_PARAMETER(FxDriverGlobals);
+    }
+
+    PVOID
+    operator new(
+        __in size_t Size,
+        __in PFX_DRIVER_GLOBALS FxDriverGlobals,
+        __in POOL_TYPE PoolType = NonPagedPool
+        )
+    {
+        return FxPoolAllocate(FxDriverGlobals, PoolType, Size);
+    }
+
+    VOID
+    operator delete(
+        __in PVOID pointer
+        )
+    {
+        FxPoolFree(pointer);
+    }
+
+protected:
+    void
+    __inline
+    CallbackStart(
+        VOID
+        )
+    {
+        // intentionally does nothing, visual place marker only for now
+        DO_NOTHING();
+    }
+
+    void
+    __inline
+    CallbackEnd(
+        VOID
+        )
+    {
+        // intentionally does nothing, visual place marker only for now
+        DO_NOTHING();
+    }
+};
+
+class FxLockedCallback {
+
+private:
+    FxCallbackLock* m_CallbackLock;
+
+public:
+    FxLockedCallback(
+        VOID
+        )
+    {
+        m_CallbackLock = NULL;
+    }
+
+    FxCallbackLock*
+    GetCallbackLockPtr(
+        VOID
+        )
+    {
+        return m_CallbackLock;
+    }
+
+    void
+    SetCallbackLockPtr(
+        FxCallbackLock* Lock
+        )
+    {
+        m_CallbackLock = Lock;
+    }
+
+protected:
+    __inline
+    void
+    CallbackStart(
+        __out PKIRQL PreviousIrql
+        )
+    {
+        if (m_CallbackLock != NULL) {
+            m_CallbackLock->Lock(PreviousIrql);
+        }
+    }
+
+    __inline
+    void
+    CallbackEnd(
+        __in KIRQL PreviousIrql
+        )
+    {
+        if (m_CallbackLock != NULL) {
+            m_CallbackLock->Unlock(PreviousIrql);
+        }
+    }
+};
+
+#endif // _FXCALLBACK_H_