On 2015-03-31 10:50, Ervin Hegedüs wrote: > there is an app, written in Python, which stores few bytes of > datas in a single file. The application uses threads. Every > thread can modify the file, but only one at a time. I'm using a > lock file to prevent the multiple access. > > ... > > How can I prevent or avoid this issue? What's the correct way to > handle the lockfile in Python?
Hi Ervin- If only one instance of the app is running at a given time, and you only need to ensure mutual exclusion between its threads, you should probably not use a lock *file* for this. I would strongly recommend that you use a threading.Lock as per https://docs.python.org/2.5/lib/module-threading.html instead of a lock file. This will also allow you to avoid a 0.2-second polling loop; a call to threading.Lock.acquire() will block until it is released by another thread. MMR... -- https://mail.python.org/mailman/listinfo/python-list
