Returns the FiberHandle of the current owner of the lock.
Function returns FiberHandle.init if not currently locked. This is not the same as calling isLocked.
There are some cases where isLocked will return true but owner will return the invalid handle.
Returns the FiberHandle of the current owner of the lock.
Function returns FiberHandle.init if not currently locked. This is not the same as calling isLocked. There are some cases where isLocked will return true but owner will return the invalid handle.