RFC 7231 HYPERTEXT SWITCH PROTOCOL HTTP 1 1: SEMANTICS AND CONTENT

This may be known as from any process or thread, not onlythe process or thread which originally acquired the lock. With the block argument set to False, the strategy name does notblock. If the lock is presently in a locked state, return False;otherwise set the lock to a locked state and return True. If a course of is killed while it's attempting to