[win] New base::CoInit class

base/win/coinit.h

@@ -0,0 +1,35 @@
+// LAF Base Library
+// Copyright (c) 2024 Igara Studio S.A.
+//
+// This file is released under the terms of the MIT license.
+// Read LICENSE.txt for more information.
+
+#ifndef BASE_WIN_COINIT_H_INCLUDED
+#define BASE_WIN_COINIT_H_INCLUDED
+#pragma once
+
+#if !LAF_WINDOWS
+  #error This header file can be used only on Windows platform
+#endif
+
+#include <objbase.h>
+
+namespace base {
+
+// Successful calls to CoInitialize() (S_OK or S_FALSE) must match
+// the calls to CoUninitialize().
+// From:
+//   https://docs.microsoft.com/en-us/windows/win32/api/combaseapi/nf-combaseapi-couninitialize#remarks
+struct CoInit {
+  HRESULT hr;
+  CoInit() { hr = CoInitialize(nullptr); }
+  ~CoInit()
+  {
+    if (hr == S_OK || hr == S_FALSE)
+      CoUninitialize();
+  }
+};
+
+}  // namespace base
+
+#endif