On Monday, 3 March 2014 at 07:38:05 UTC, Ali Çehreli wrote:
The documentation says that Mutex is a recursive lock, meaning that the holder of the lock can lock it even further. :) There is an internal reference count so that the lock must be unlocked the equal number of times that it has been locked.
Maybe this is because I haven't done much work with multi-threading, but this seems like a strange thing. What would be the benefits of locking a mutex more than once? It makes sense to me that a mutex should be allowed to be locked only once, and anything else trying to lock it get's held up until it has been unlocked, or a false is returned in the case of a tryLock.
and this may seem like a silly question(like I said, not much multi-threading experience), but what determines the holder of a lock? Is it the thread or is it a specific function? Or something else?
