From c7d946a3d97bf3e9a76111c082b6350487b8805d Mon Sep 17 00:00:00 2001
From: Joe Thornber <ejt@redhat.com>
Date: Wed, 31 Aug 2011 13:40:52 +0100
Subject: [PATCH] simplify clone to just be an increment

---
 btree.tcc | 26 ++------------------------
 1 file changed, 2 insertions(+), 24 deletions(-)

diff --git a/btree.tcc b/btree.tcc
index 3ff83b9..09e5210 100644
--- a/btree.tcc
+++ b/btree.tcc
@@ -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