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simplify clone to just be an increment

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This commit is contained in:
Joe Thornber 2011-08-31 13:40:52 +01:00
parent e408192b06
commit c7d946a3d9
1 changed files with 2 additions and 24 deletions
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26
btree.tcc
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@ -401,30 +401,8 @@ template <unsigned Levels, typename ValueTraits>
typename btree<Levels, ValueTraits>::ptr
btree<Levels, ValueTraits>::clone() const
{
using namespace btree_detail;
ro_spine spine(tm_);
spine.step(root_);
write_ref new_root = tm_->new_block();
internal_node o = spine.template get_node<uint64_traits>();
if (o.get_type() == INTERNAL) {
internal_node n = to_node<uint64_traits>(new_root);
::memcpy(n.raw(), o.raw(), MD_BLOCK_SIZE);
typename uint64_traits::ref_counter rc(internal_rc_);
n.inc_children(rc);
} else {
leaf_node n = to_node<ValueTraits>(new_root);
::memcpy(n.raw(), o.raw(), MD_BLOCK_SIZE);
typename ValueTraits::ref_counter rc(rc_);
n.inc_children(rc);
}
return btree<Levels, ValueTraits>::ptr(
new btree<Levels, ValueTraits>(
tm_, new_root.get_location(), rc_));
tm_->get_sm()->inc(root_);
return ptr(new btree<Levels, ValueTraits>(tm_, root_, rc_));
}
#if 0