Refactor around sharings

- exposing additional handles in common code
- adding proxy for CreateEvent (windows)

Change-Id: I90872682c6c518c98d9d43e79f5112ee869e94aa

runtime/os_interface/windows/os_interface.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017, Intel Corporation
+ * Copyright (c) 2017 - 2018, Intel Corporation
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),
@@ -32,6 +32,7 @@ class Wddm;
 class OSInterface::OSInterfaceImpl {
   public:
     OSInterfaceImpl();
+    virtual ~OSInterfaceImpl() = default;
     Wddm *getWddm() const;
     void setWddm(Wddm *wddm);
     D3DKMT_HANDLE getAdapterHandle() const;
@@ -39,6 +40,10 @@ class OSInterface::OSInterfaceImpl {
     PFND3DKMT_ESCAPE getEscapeHandle() const;
     uint32_t getHwContextId() const;
 
+    MOCKABLE_VIRTUAL HANDLE createEvent(LPSECURITY_ATTRIBUTES lpEventAttributes, BOOL bManualReset, BOOL bInitialState,
+                                        LPCSTR lpName);
+    MOCKABLE_VIRTUAL BOOL closeHandle(HANDLE hObject);
+
   protected:
     Wddm *wddm;
 };