1 files changed, 36 insertions, 0 deletions
diff --git a/llvm/lib/Support/Windows/COM.inc b/llvm/lib/Support/Windows/COM.inc
new file mode 100644
index 0000000000000..002182bc39394
--- /dev/null
+++ b/llvm/lib/Support/Windows/COM.inc
@@ -0,0 +1,36 @@
+//==- llvm/Support/Windows/COM.inc - Windows COM Implementation -*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the Windows portion of COM support.
+//
+//===----------------------------------------------------------------------===//
+
+//===----------------------------------------------------------------------===//
+//=== WARNING: Implementation here must contain only Windows code.
+//===----------------------------------------------------------------------===//
+
+#include <objbase.h>
+
+namespace llvm {
+namespace sys {
+
+InitializeCOMRAII::InitializeCOMRAII(COMThreadingMode Threading,
+                                     bool SpeedOverMemory) {
+  DWORD Coinit = 0;
+  if (Threading == COMThreadingMode::SingleThreaded)
+    Coinit |= COINIT_APARTMENTTHREADED;
+  else
+    Coinit |= COINIT_MULTITHREADED;
+  if (SpeedOverMemory)
+    Coinit |= COINIT_SPEED_OVER_MEMORY;
+  ::CoInitializeEx(nullptr, Coinit);
+}
+
+InitializeCOMRAII::~InitializeCOMRAII() { ::CoUninitialize(); }
+}
+}