Reader-Writer lock with priority for writers in Python

I needed a reader-writer lock to use in the second readers-writers problem with python threads. In this problem, many readers can simultaneously access a share, and a writer has an exclusive access to this share. Additionally, the following constraints should be met: 1) no reader should be kept waiting if the share is currently opened for reading unless a writer is also waiting for the share, 2) no writer should be kept waiting for the share longer than absolutely necessary.

Surprisingly, I wasn’t able to find an implementation of such a synchronization object that met some basic common-sense requirements: 1) simple, clear implementation, 2) tested with some basic unit tests. So, I wrote my own version — it is placed here: .

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4 Responses to Reader-Writer lock with priority for writers in Python

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  3. matt says:

    Hi there,
    Are you still maintaining the RWLock and is it on github? This is a nice implementation of RWLock but I think there might be some potential problem when several writer want to acquire the lock. I would be glad to fork the project if it’s already on github. If it’s not, do you mind I fork it on github?


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