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Description: Do not run multiprocessing test if multiprocessing.synchronize is not working
On platforms that do not have a working sem_open implementation, importing
multiprocessing.synchronize will fail with an ImportError. While creating a
multiprocessing.Pool instance, multiprocessing.synchronize will be imported and
might throw an ImportError.
Author: Sebastian Ramacher <sramacher@debian.org>
Forwarded: yes, https://github.com/dlitz/pycrypto/pull/61
Last-Update: 2013-10-17
diff --git a/lib/Crypto/SelfTest/Random/test__UserFriendlyRNG.py b/lib/Crypto/SelfTest/Random/test__UserFriendlyRNG.py
index 771a663..3fd7ad4 100644
--- a/lib/Crypto/SelfTest/Random/test__UserFriendlyRNG.py
+++ b/lib/Crypto/SelfTest/Random/test__UserFriendlyRNG.py
@@ -39,6 +39,11 @@
try:
import multiprocessing
+ # multiprocessing.Pool uses classes from multiprocessing.synchronize, so we
+ # need to check if multiprocessing.semaphore will work. Otherwise creating a
+ # multiprocessing.Pool instance will fail with an ImportError. See Python
+ # bug #3770 for details.
+ import multiprocessing.synchronize
except ImportError:
multiprocessing = None
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