1 files changed, 177 insertions, 0 deletions
diff --git a/serial/VirtualSerial/dllsup.cpp b/serial/VirtualSerial/dllsup.cpp
new file mode 100644
index 00000000..6c254085
--- /dev/null
+++ b/serial/VirtualSerial/dllsup.cpp
@@ -0,0 +1,177 @@
+/*++
+
+Copyright (C) Microsoft Corporation, All Rights Reserved.
+
+Module Name:
+
+    dllsup.cpp
+
+Abstract:
+
+    This module contains the implementation of the UMDF VirtualSerial Sample
+    Driver's entry point and its exported functions for providing COM support.
+
+    This module can be copied without modification to a new UMDF driver.  It
+    depends on some of the code in comsup.cpp & comsup.h to handle DLL
+    registration and creating the first class factory.
+
+    This module is dependent on the following defines:
+
+        MYDRIVER_TRACING_ID -      A wide string passed to WPP when initializing
+                                   tracing.  For example, VirtualSerial uses
+                                   L"Microsoft\\UMDF\\VirtualSerial"
+
+        MYDRIVER_CLASS_ID -   A GUID encoded in struct format used to
+                              initialize the driver's ClassID.
+
+    These are defined in internal.h for the sample.  If you choose
+    to use a different primary include file, you should ensure they are
+    defined there as well.
+
+Environment:
+
+    WDF User-Mode Driver Framework (WDF:UMDF)
+
+--*/
+
+#include "internal.h"
+#include "dllsup.tmh"
+
+const GUID CLSID_MyDriverCoClass = MYDRIVER_CLASS_ID;
+
+BOOL
+WINAPI
+DllMain(
+    HINSTANCE ModuleHandle,
+    DWORD Reason,
+    PVOID /* Reserved */
+   )
+/*++
+
+  Routine Description:
+
+    This is the entry point and exit point for the I/O trace driver.  This
+    does very little as the I/O trace driver has minimal global data.
+
+    This method initializes tracing.
+
+  Arguments:
+
+    ModuleHandle - the DLL handle for this module.
+
+    Reason - the reason this entry point was called.
+
+    Reserved - unused
+
+  Return Value:
+
+    TRUE
+
+--*/
+{
+
+    UNREFERENCED_PARAMETER( ModuleHandle );
+
+    if (DLL_PROCESS_ATTACH == Reason)
+    {
+        //
+        // Initialize tracing.
+        //
+
+        WPP_INIT_TRACING(MYDRIVER_TRACING_ID);
+
+    }
+    else if (DLL_PROCESS_DETACH == Reason)
+    {
+        //
+        // Cleanup tracing.
+        //
+
+        WPP_CLEANUP();
+    }
+
+    return TRUE;
+}
+
+HRESULT
+STDAPICALLTYPE
+DllGetClassObject(
+    _In_ REFCLSID ClassId,
+    _In_ REFIID InterfaceId,
+    _Outptr_ LPVOID *Interface
+    )
+/*++
+
+  Routine Description:
+
+    This routine is called by COM in order to instantiate the
+    driver callback object and do an initial query interface on it.
+
+    This method only creates an instance of the driver's class factory, as this
+    is the minimum required to support UMDF.
+
+  Arguments:
+
+    ClassId - the CLSID of the object being "gotten"
+
+    InterfaceId - the interface the caller wants from that object.
+
+    Interface - a location to store the referenced interface pointer
+
+  Return Value:
+
+    S_OK if the function succeeds or error indicating the cause of the
+    failure.
+
+--*/
+{
+    PCClassFactory factory;
+
+    HRESULT hr = S_OK;
+
+    *Interface = NULL;
+
+    //
+    // If the CLSID doesn't match that of our "coclass" (defined in the IDL
+    // file) then we can't create the object the caller wants.  This may
+    // indicate that the COM registration is incorrect, and another CLSID
+    // is referencing this drvier.
+    //
+
+    if (IsEqualCLSID(ClassId, CLSID_MyDriverCoClass) == false)
+    {
+        Trace(
+            TRACE_LEVEL_ERROR,
+            L"ERROR: Called to create instance of unrecognized class (%!GUID!)",
+            &ClassId
+            );
+
+        return CLASS_E_CLASSNOTAVAILABLE;
+    }
+
+    //
+    // Create an instance of the class factory for the caller.
+    //
+
+    factory = new CClassFactory();
+
+    if (NULL == factory)
+    {
+        hr = E_OUTOFMEMORY;
+    }
+
+    //
+    // Query the object we created for the interface the caller wants.  After
+    // that we release the object.  This will drive the reference count to
+    // 1 (if the QI succeeded an referenced the object) or 0 (if the QI failed).
+    // In the later case the object is automatically deleted.
+    //
+
+    if (SUCCEEDED(hr))
+    {
+        hr = factory->QueryInterface(InterfaceId, Interface);
+        factory->Release();
+    }
+
+    return hr;
+}