update wil to 0b2d6c2d822bb301e7558a14ee66d567c14f5dc7

Externals/WIL/include/wil/cppwinrt_wrl.h

@@ -0,0 +1,74 @@
+//*********************************************************
+//
+//    Copyright (c) Microsoft. All rights reserved.
+//    This code is licensed under the MIT License.
+//    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
+//    ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
+//    TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+//    PARTICULAR PURPOSE AND NONINFRINGEMENT.
+//
+//*********************************************************
+#ifndef __WIL_CPPWINRT_WRL_INCLUDED
+#define __WIL_CPPWINRT_WRL_INCLUDED
+
+#include "cppwinrt.h"
+#include <winrt\base.h>
+
+#include "result_macros.h"
+#include <wrl\module.h>
+
+// wil::wrl_factory_for_winrt_com_class provides interopability between a
+// C++/WinRT class and the WRL Module system, allowing the winrt class to be
+// CoCreatable.
+//
+// Usage:
+//   - In your cpp, add:
+//         CoCreatableCppWinRtClass(className)
+//
+//   - In the dll.cpp (or equivalent) for the module containing your class, add:
+//         CoCreatableClassWrlCreatorMapInclude(className)
+//
+namespace wil
+{
+    namespace details
+    {
+        template <typename TCppWinRTClass>
+        class module_count_wrapper : public TCppWinRTClass
+        {
+        public:
+            module_count_wrapper()
+            {
+                if (auto modulePtr = ::Microsoft::WRL::GetModuleBase())
+                {
+                    modulePtr->IncrementObjectCount();
+                }
+            }
+
+            virtual ~module_count_wrapper()
+            {
+                if (auto modulePtr = ::Microsoft::WRL::GetModuleBase())
+                {
+                    modulePtr->DecrementObjectCount();
+                }
+            }
+        };
+    }
+
+    template <typename TCppWinRTClass>
+    class wrl_factory_for_winrt_com_class : public ::Microsoft::WRL::ClassFactory<>
+    {
+    public:
+        IFACEMETHODIMP CreateInstance(_In_opt_ ::IUnknown* unknownOuter, REFIID riid, _COM_Outptr_ void **object) noexcept try
+        {
+            *object = nullptr;
+            RETURN_HR_IF(CLASS_E_NOAGGREGATION, unknownOuter != nullptr);
+
+            return winrt::make<details::module_count_wrapper<TCppWinRTClass>>().as(riid, object);
+        }
+        CATCH_RETURN()
+    };
+}
+
+#define CoCreatableCppWinRtClass(className) CoCreatableClassWithFactory(className, ::wil::wrl_factory_for_winrt_com_class<className>)
+
+#endif // __WIL_CPPWINRT_WRL_INCLUDED