/**
* Resets the internal unit pointer to match the given pointer.
* The value of my_manager_ is preserved -- the old unit is deregistered,
* and the new unit is registered with the same manager.
*/
void fake_unit_ptr::reset(const internal_ptr & ptr)
{
if (unit_.get() != ptr.get()) {
fake_unit_manager * mgr = my_manager_;
remove_from_fake_unit_manager();
unit_ = ptr;
if (mgr)
place_on_fake_unit_manager(mgr);
}
}
/**
* Assignment operator, taking a unit.
* If already in the queue, @a this will be moved to the end of the
* queue (drawn last).
*
* This function is unsuitable for derived classes and MUST be overridden.
* Furthermore, derived classes must not explicitly call this version.
*
* The overriding function can be almost the same, except "new (this)" should
* be followed by the derived class instead of "fake_unit(a)".
*/
fake_unit & fake_unit::operator=(unit const & a)
{
if ( this != &a ) {
fake_unit_manager * mgr = my_manager_;
// Use the copy constructor to make sure we are coherent.
// (Methodology copied from unit::operator=)
this->~fake_unit();
new (this) fake_unit(a);
// Restore our old manager.
if ( mgr != NULL )
place_on_fake_unit_manager(mgr);
}
return *this;
}
fake_unit_ptr::fake_unit_ptr(const internal_ptr & u, fake_unit_manager * mgr) : unit_(u), my_manager_(NULL)
{
place_on_fake_unit_manager(mgr);
}