22 Oct
2006
22 Oct
'06
10:21 a.m.
Chris Thomasson wrote:
One thing I forgot to mention in my last post, nit-picking, your algorithm sketch invoked the user-provided destructor in the context of the critical-section provided by the lock that is associated with the count ptr. Can't call function pointers while you hold a lock? ;)
Yes, I "oversimplified" a bit. *this = rhs is a shorthand for shared_ptr( rhs ).swap( *this ) and the copy/destroy parts of it need to be outside the lock: void replace( shared_ptr rhs ) take write (rw)spinlock for this this->swap( rhs ) release spinlock Another mistake was that the spinlock should be associated with 'this', not with the pointer to count as in your scheme.