diff options
| -rw-r--r-- | src/cryptography/hazmat/bindings/openssl/binding.py | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/src/cryptography/hazmat/bindings/openssl/binding.py b/src/cryptography/hazmat/bindings/openssl/binding.py index e8bf267b..a750cd6b 100644 --- a/src/cryptography/hazmat/bindings/openssl/binding.py +++ b/src/cryptography/hazmat/bindings/openssl/binding.py @@ -174,7 +174,9 @@ class Binding(object): ) -# OpenSSL is not thread safe until the locks are initialized. We initialize in -# module scope to cause initialization whenever this module is imported (and -# try to get some benefit from the import lock). +# OpenSSL is not thread safe until the locks are initialized. We call this +# method in module scope so that it executes with the import lock. On +# Pythons < 3.4 this import lock is a global lock, which can prevent a race +# condition registering the OpenSSL locks. On Python 3.4+ the import lock +# is per module so this approach will not work. Binding.init_static_locks() |