multiprocessing-utils 0.3

Multiprocessing utils (shared locks and thread locals)

Multiprocessing utilities

Shared locks

“Shared” version of the standard Lock() and RLock() classes found in the multiprocessing/threading modules.

Shared locks can be acquired in two modes, shared and exclusive.

Any number of processes/threads can acquire the lock in shared mode.

Only one process/thread can acquire the lock in exclusive mode.

A process/thread attempting to exclusively acquire the lock will block until the lock has been released by all other threads/processes.

A process/thread attempting to shared acquire the lock will only block if there is an exclusive lock.

This is a little like database locks, which can be acquired for shared reading, or exclusive writing.

multiprocess theading.local()

A process and thread safe version of threading.local()

A standard threading.local() instance created before forking (via os.fork() or multiprocessing.Process()) will not behave as expected.