diff options
Diffstat (limited to 'Lib/concurrent/futures/thread.py')
| -rw-r--r-- | Lib/concurrent/futures/thread.py | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/Lib/concurrent/futures/thread.py b/Lib/concurrent/futures/thread.py index d84b3aa..b89f8f2 100644 --- a/Lib/concurrent/futures/thread.py +++ b/Lib/concurrent/futures/thread.py @@ -29,10 +29,14 @@ import os _threads_queues = weakref.WeakKeyDictionary() _shutdown = False +# Lock that ensures that new workers are not created while the interpreter is +# shutting down. Must be held while mutating _threads_queues and _shutdown. +_global_shutdown_lock = threading.Lock() def _python_exit(): global _shutdown - _shutdown = True + with _global_shutdown_lock: + _shutdown = True items = list(_threads_queues.items()) for t, q in items: q.put(None) @@ -156,7 +160,7 @@ class ThreadPoolExecutor(_base.Executor): self._initargs = initargs def submit(self, fn, /, *args, **kwargs): - with self._shutdown_lock: + with self._shutdown_lock, _global_shutdown_lock: if self._broken: raise BrokenThreadPool(self._broken) |