Re: [boost] boost::shared_ptr<>::compare_and_swap()--AmIinsaneforwanting this?

Peter Dimov wrote:

bool compare_and_swap( shared_ptr & p, shared_ptr const & cmp, shared_ptr xchg )

lock spinlock for p bool r = p == cmp; if( r ) p.swap( xchg ); unlock spinlock for p return r;

This actually should be trylock spinlock for p if failed return false bool r = p == cmp; if( r ) p.swap( xchg ); unlock spinlock for p return r;