Why isn't the reference counter in boost::shared_ptr volatile?
Posted
by Johann Gerell
on Stack Overflow
See other posts from Stack Overflow
or by Johann Gerell
Published on 2010-03-26T11:02:27Z
Indexed on
2010/03/26
11:03 UTC
Read the original article
Hit count: 478
In the boost::shared_ptr destructor, this is done:
if(--*pn == 0)
{
boost::checked_delete(px);
delete pn;
}
where pn is a pointer to the reference counter, which is typedefed as
shared_ptr::count_type -> detail::atomic_count -> long
I would have expected the long to be volatile long, given threaded usage and the non-atomic 0-check-and-deletion in the shared_ptr destructor above. Why isn't it volatile?
© Stack Overflow or respective owner
