Generate unique identifiers

Uniqueness is guaranteed inside a single run

Author: e3krisztian

unblob/identifiers.py

@@ -0,0 +1,17 @@
+import os
+from threading import Lock
+
+__last_id = 0
+__last_id_lock = Lock()
+
+
+def new_id():
+    # NOTE, that uuid4 can not be used, as there are multiple processes at run time,
+    # and as subprocesses inherit the random number state, so uuid4 would generate colliding ids
+    # another option that would not work is to use uuid1, but we could generate the id
+    # at the same time
+
+    global __last_id
+    with __last_id_lock:
+        __last_id += 1
+        return f"{os.getpid()}:{__last_id}"