1 files changed, 54 insertions, 0 deletions
diff --git a/intern/cycles/util/windows.cpp b/intern/cycles/util/windows.cpp
new file mode 100644
index 00000000000..96944d07390
--- /dev/null
+++ b/intern/cycles/util/windows.cpp
@@ -0,0 +1,54 @@
+/*
+ * Copyright 2019-2019 Blender Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifdef _WIN32
+#  include <windows.h>
+#endif
+
+#include "util/windows.h"
+
+CCL_NAMESPACE_BEGIN
+
+bool system_windows_version_at_least(int major, int build)
+{
+#ifdef _WIN32
+  HMODULE hMod = ::GetModuleHandleW(L"ntdll.dll");
+  if (hMod == 0) {
+    return false;
+  }
+
+  typedef NTSTATUS(WINAPI * RtlGetVersionPtr)(PRTL_OSVERSIONINFOW);
+  RtlGetVersionPtr rtl_get_version = (RtlGetVersionPtr)::GetProcAddress(hMod, "RtlGetVersion");
+  if (rtl_get_version == NULL) {
+    return false;
+  }
+
+  RTL_OSVERSIONINFOW rovi = {0};
+  rovi.dwOSVersionInfoSize = sizeof(rovi);
+  if (rtl_get_version(&rovi) != 0) {
+    return false;
+  }
+
+  return (rovi.dwMajorVersion > major ||
+          (rovi.dwMajorVersion == major && rovi.dwBuildNumber >= build));
+#else
+  (void)major;
+  (void)build;
+  return false;
+#endif
+}
+
+CCL_NAMESPACE_END