From 482c7447dd2f63823eb969c37dd6fb4e22991fde Mon Sep 17 00:00:00 2001
From: Brian Norris <banorris@uci.edu>
Date: Mon, 4 Feb 2013 16:22:03 -0800
Subject: [PATCH] cyclegraph: add overloaded getNode_noCreate()

Need a generic way to map a ModelAction/Promise to a CycleNode.
---
 cyclegraph.cc | 19 +++++++++++++++++--
 cyclegraph.h  |  4 +++-
 2 files changed, 20 insertions(+), 3 deletions(-)

diff --git a/cyclegraph.cc b/cyclegraph.cc
index 54b91238..2c3a5936 100644
--- a/cyclegraph.cc
+++ b/cyclegraph.cc
@@ -31,14 +31,29 @@ void CycleGraph::putNode(const ModelAction *act, CycleNode *node)
 #endif
 }
 
+/** @return The corresponding CycleNode, if exists; otherwise NULL */
+CycleNode * CycleGraph::getNode_noCreate(const ModelAction *act) const
+{
+	return actionToNode.get(act);
+}
+
+/** @return The corresponding CycleNode, if exists; otherwise NULL */
+CycleNode * CycleGraph::getNode_noCreate(const Promise *promise) const
+{
+	return readerToPromiseNode.get(promise->get_action());
+}
+
 /**
  * @brief Returns the CycleNode corresponding to a given ModelAction
+ *
+ * Gets (or creates, if none exist) a CycleNode corresponding to a ModelAction
+ *
  * @param action The ModelAction to find a node for
  * @return The CycleNode paired with this action
  */
 CycleNode * CycleGraph::getNode(const ModelAction *action)
 {
-	CycleNode *node = actionToNode.get(action);
+	CycleNode *node = getNode_noCreate(action);
 	if (node == NULL) {
 		node = new CycleNode(action);
 		putNode(action, node);
@@ -58,7 +73,7 @@ CycleNode * CycleGraph::getNode(const ModelAction *action)
 CycleNode * CycleGraph::getNode(const Promise *promise)
 {
 	const ModelAction *reader = promise->get_action();
-	CycleNode *node = readerToPromiseNode.get(reader);
+	CycleNode *node = getNode_noCreate(promise);
 	if (node == NULL) {
 		node = new CycleNode(promise);
 		readerToPromiseNode.put(reader, node);
diff --git a/cyclegraph.h b/cyclegraph.h
index c9c575ab..f03c4ecf 100644
--- a/cyclegraph.h
+++ b/cyclegraph.h
@@ -52,8 +52,10 @@ class CycleGraph {
  private:
 	void addNodeEdge(CycleNode *fromnode, CycleNode *tonode);
 	void putNode(const ModelAction *act, CycleNode *node);
-	CycleNode * getNode(const ModelAction *);
+	CycleNode * getNode(const ModelAction *act);
 	CycleNode * getNode(const Promise *promise);
+	CycleNode * getNode_noCreate(const ModelAction *act) const;
+	CycleNode * getNode_noCreate(const Promise *promise) const;
 	bool mergeNodes(CycleNode *node1, CycleNode *node2,
 			promise_list_t *mustMerge);
 
-- 
2.34.1