Locks

uWSGI supports a configurable number of locks you can use to synchronize workerprocesses. Lock 0 (zero) is always available, but you can add more with thelocks option. If your app has a lot of critical areas, holding andreleasing the same lock over and over again can kill performance.

def use_lock_zero_for_important_things():
    uwsgi.lock() # Implicit parameter 0
    # Critical section
    uwsgi.unlock() # Implicit parameter 0
 
def use_another_lock():
    uwsgi.lock(1)
    time.sleep(1) # Take that, performance! Ha!
    uwsgi.unlock(1)