increase compatibility with windows 11.

mdrsclient/utils.py

@@ -0,0 +1,24 @@
+import os
+from typing import IO, Any
+
+if os.name == "nt":
+    import msvcrt
+
+elif os.name == "posix":
+    import fcntl
+
+
+class FileLock:
+    @staticmethod
+    def lock(file: IO[Any]) -> None:
+        if os.name == "nt":
+            msvcrt.locking(file.fileno(), msvcrt.LK_LOCK, 1)
+        elif os.name == "posix":
+            fcntl.flock(file.fileno(), fcntl.LOCK_EX)
+
+    @staticmethod
+    def unlock(file: IO[Any]) -> None:
+        if os.name == "nt":
+            msvcrt.locking(file.fileno(), msvcrt.LK_UNLCK, 1)
+        else:
+            fcntl.flock(file.fileno(), fcntl.LOCK_UN)