1 files changed, 33 insertions, 0 deletions
diff --git a/third_party/rust/uniffi_bindgen/src/bindings/python/templates/HandleMap.py b/third_party/rust/uniffi_bindgen/src/bindings/python/templates/HandleMap.py
new file mode 100644
index 0000000000..f7c13cf745
--- /dev/null
+++ b/third_party/rust/uniffi_bindgen/src/bindings/python/templates/HandleMap.py
@@ -0,0 +1,33 @@
+class _UniffiHandleMap:
+    """
+    A map where inserting, getting and removing data is synchronized with a lock.
+    """
+
+    def __init__(self):
+        # type Handle = int
+        self._map = {}  # type: Dict[Handle, Any]
+        self._lock = threading.Lock()
+        self._counter = itertools.count()
+
+    def insert(self, obj):
+        with self._lock:
+            handle = next(self._counter)
+            self._map[handle] = obj
+            return handle
+
+    def get(self, handle):
+        try:
+            with self._lock:
+                return self._map[handle]
+        except KeyError:
+            raise InternalError("UniffiHandleMap.get: Invalid handle")
+
+    def remove(self, handle):
+        try:
+            with self._lock:
+                return self._map.pop(handle)
+        except KeyError:
+            raise InternalError("UniffiHandleMap.remove: Invalid handle")
+
+    def __len__(self):
+        return len(self._map)