Fixed #30451 -- Added ASGI handler and coroutine-safety.

This adds an ASGI handler, asgi.py file for the default project layout,
a few async utilities and adds async-safety to many parts of Django.

1 files changed, 4 insertions, 3 deletions

diff --git a/django/test/signals.py b/django/test/signals.py
index a623e756ce..31a5017602 100644
--- a/django/test/signals.py
+++ b/django/test/signals.py
@@ -1,8 +1,9 @@
 import os
-import threading
 import time
 import warnings
 
+from asgiref.local import Local
+
 from django.apps import apps
 from django.core.exceptions import ImproperlyConfigured
 from django.core.signals import setting_changed
@@ -26,7 +27,7 @@ COMPLEX_OVERRIDE_SETTINGS = {'DATABASES'}
 def clear_cache_handlers(**kwargs):
     if kwargs['setting'] == 'CACHES':
         from django.core.cache import caches
-        caches._caches = threading.local()
+        caches._caches = Local()
 
 
 @receiver(setting_changed)
@@ -113,7 +114,7 @@ def language_changed(**kwargs):
     if kwargs['setting'] in {'LANGUAGES', 'LANGUAGE_CODE', 'LOCALE_PATHS'}:
         from django.utils.translation import trans_real
         trans_real._default = None
-        trans_real._active = threading.local()
+        trans_real._active = Local()
     if kwargs['setting'] in {'LANGUAGES', 'LOCALE_PATHS'}:
         from django.utils.translation import trans_real
         trans_real._translations = {}