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Avoid some extraneous reference count operations.

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This commit is contained in:
JoelKatz
2012-12-14 10:10:52 -08:00
parent bc3f641373
commit 0da30fc82e
2 changed files with 32 additions and 28 deletions
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40
src/cpp/ripple/SHAMap.cpp
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@@ -139,16 +139,18 @@ void SHAMap::dirtyUp(std::stack<SHAMapTreeNode::pointer>& stack, const uint256&
}
}
SHAMapTreeNode::pointer SHAMap::checkCacheNode(const SHAMapNode& iNode)
static const SHAMapTreeNode::pointer no_node;
SHAMapTreeNode::ref SHAMap::checkCacheNode(const SHAMapNode& iNode)
{
boost::unordered_map<SHAMapNode, SHAMapTreeNode::pointer>::iterator it = mTNByID.find(iNode);
if (it == mTNByID.end())
return SHAMapTreeNode::pointer();
return no_node;
it->second->touch(mSeq);
return it->second;
}
SHAMapTreeNode::pointer SHAMap::walkTo(const uint256& id, bool modify)
SHAMapTreeNode::ref SHAMap::walkTo(const uint256& id, bool modify)
{ // walk down to the terminal node for this ID
SHAMapTreeNode::pointer inNode = root;
@@ -370,42 +372,44 @@ void SHAMap::eraseChildren(SHAMapTreeNode::pointer node)
return;
}
SHAMapItem::pointer SHAMap::peekFirstItem()
static const SHAMapItem::pointer no_item;
SHAMapItem::ref SHAMap::peekFirstItem()
{
boost::recursive_mutex::scoped_lock sl(mLock);
SHAMapTreeNode *node = firstBelow(root.get());
if (!node)
return SHAMapItem::pointer();
return no_item;
return node->peekItem();
}
SHAMapItem::pointer SHAMap::peekFirstItem(SHAMapTreeNode::TNType& type)
SHAMapItem::ref SHAMap::peekFirstItem(SHAMapTreeNode::TNType& type)
{
boost::recursive_mutex::scoped_lock sl(mLock);
SHAMapTreeNode *node = firstBelow(root.get());
if (!node)
return SHAMapItem::pointer();
return no_item;
type = node->getType();
return node->peekItem();
}
SHAMapItem::pointer SHAMap::peekLastItem()
SHAMapItem::ref SHAMap::peekLastItem()
{
boost::recursive_mutex::scoped_lock sl(mLock);
SHAMapTreeNode *node = lastBelow(root.get());
if (!node)
return SHAMapItem::pointer();
return no_item;
return node->peekItem();
}
SHAMapItem::pointer SHAMap::peekNextItem(const uint256& id)
SHAMapItem::ref SHAMap::peekNextItem(const uint256& id)
{
SHAMapTreeNode::TNType type;
return peekNextItem(id, type);
}
SHAMapItem::pointer SHAMap::peekNextItem(const uint256& id, SHAMapTreeNode::TNType& type)
SHAMapItem::ref SHAMap::peekNextItem(const uint256& id, SHAMapTreeNode::TNType& type)
{ // Get a pointer to the next item in the tree after a given item - item must be in tree
boost::recursive_mutex::scoped_lock sl(mLock);
@@ -438,10 +442,10 @@ SHAMapItem::pointer SHAMap::peekNextItem(const uint256& id, SHAMapTreeNode::TNTy
}
}
// must be last item
return SHAMapItem::pointer();
return no_item;
}
SHAMapItem::pointer SHAMap::peekPrevItem(const uint256& id)
SHAMapItem::ref SHAMap::peekPrevItem(const uint256& id)
{ // Get a pointer to the previous item in the tree after a given item - item must be in tree
boost::recursive_mutex::scoped_lock sl(mLock);
@@ -467,24 +471,24 @@ SHAMapItem::pointer SHAMap::peekPrevItem(const uint256& id)
}
}
// must be last item
return SHAMapItem::pointer();
return no_item;
}
SHAMapItem::pointer SHAMap::peekItem(const uint256& id)
SHAMapItem::ref SHAMap::peekItem(const uint256& id)
{
boost::recursive_mutex::scoped_lock sl(mLock);
SHAMapTreeNode* leaf = walkToPointer(id);
if (!leaf)
return SHAMapItem::pointer();
return no_item;
return leaf->peekItem();
}
SHAMapItem::pointer SHAMap::peekItem(const uint256& id, SHAMapTreeNode::TNType& type)
SHAMapItem::ref SHAMap::peekItem(const uint256& id, SHAMapTreeNode::TNType& type)
{
boost::recursive_mutex::scoped_lock sl(mLock);
SHAMapTreeNode* leaf = walkToPointer(id);
if (!leaf)
return SHAMapItem::pointer();
return no_item;
type = leaf->getType();
return leaf->peekItem();
}