synchronized (this[.classinfo]) in druntime and phobos

[Thiez]

On Wednesday, 30 May 2012 at 12:43:15 UTC, deadalnix wrote:
>
> It doesn't address most of the drawback cited. Notably the fact 
> that every object have a monitor field, but most of them will 
> not use it.

That could be solved without abandoning object locks. If locking 
on all objects is allowed, objects in TLS could simply omit the 
monitor field. Locking would then be performed as:

if (object not in TLS) {
   insert expensive locking operation here
}
return

Yes, this would introduce an extra conditional jump whenever a 
lock is acquired/released, but the overhead is very small 
compared to the relatively expensive lock/unlock operation.