Issue python#7403: logging: Fixed possible race condition in lock creation.

vsajip · vsajip · commit ec1cced4d499 · 2009-11-27T15:36:32.000Z
diff --git a/Lib/logging/__init__.py b/Lib/logging/__init__.py
@@ -166,17 +166,17 @@ def addLevelName(level, levelName):
 #the lock would already have been acquired - so we need an RLock.
 #The same argument applies to Loggers and Manager.loggerDict.
 #
-_lock = None
+if thread:
+    _lock = threading.RLock()
+else:
+    _lock = None
 
 def _acquireLock():
     """
     Acquire the module-level lock for serializing access to shared data.
 
     This should be released with _releaseLock().
     """
-    global _lock
-    if (not _lock) and thread:
-        _lock = threading.RLock()
     if _lock:
         _lock.acquire()
 
diff --git a/Misc/NEWS b/Misc/NEWS
@@ -9,6 +9,11 @@ hat's New in Python 2.4.7?
 
 *Release date: XX-XXX-2009*
 
+Library
+-------
+
+- Issue #7403: logging: Fixed possible race condition in lock creation.
+
 
 What's New in Python 2.4.6?
 ===========================
