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pythonthread-safetymultiprocessing
Jonathan Livni
Jonathan Livni

Reputation: 107092

is multiprocessing.Connection thread safe?

Is a multiprocessing.Connection python object thread safe?

If it is, two threads could simultaneously use conn.recv() and conn.send() on the same connection, which could be useful for full-duplex communication.

Upvotes: 2

Views: 774

Answers (1)

C2H5OH
C2H5OH

Reputation: 5602

It looks like it is not thread safe. Up to Python 3.2, multiprocessing.Connection objects do not have any semaphore attached, nor does any of the library code that uses them.

Interestingly, in Python 3.3 the implementation has moved. But again, no locking primitive is beign used.

The documentation does not mention too much about the thread-safety of the multiprocessing module. Which is a bit unexpected, given the quality of the Python documentation.

Upvotes: 2

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