LOG_CALLis an anonymous event which uses the function signature as the event signature. It is fired by all stateful functions. The following applies to Flexible Core pools. Smart Pools have similar events and modifiers.
LOG_SWAPis fired (along with
LOG_CALL) for all swap variants.
LOG_EXITare fired for each individual token join / exit
viewlockfunction modifier. A mutex places a lock on contract state and prevents any sort of re-entrancy.