Locks & Reentrant Lock
Explore how to implement Locks and Reentrant Locks in Python's multiprocessing module to synchronize processes. Understand fixing common concurrency bugs with locks and managing reentrant locks that a process can acquire multiple times without blocking, enabling safer parallel execution.
We'll cover the following...
Locks & Reentrant Lock
Similar to the threading module, synchronization primitives exist for the multiprocessing module to coordinate among multiple processes. The primitives between the two modules have a lot of commonalities.
Because of the similarities, we just reproduce the examples from the threading section using the primitives from the multiprocessing module.
Lock
Lock is a non-recursive object and shares the same DNA as the threading.Lock class. In the section on using Queues and Pipes we introduced a snippet with a bug, that could potentially hang depending on the order in which the two processes consumed objects placed on the queue. We can ...