X-Git-Url: http://plrg.eecs.uci.edu/git/?p=model-checker.git;a=blobdiff_plain;f=cyclegraph.h;h=42866a3b370ceb52ab85967c1cfe0c80f4aedf6f;hp=df9d46c17d108c51af33862cb1777a6b150ab515;hb=620ae95ce4fed006d18a41b6ccfd949d7e77f677;hpb=fb2ab76b04c83faa654c8819c8e39b1e5fcc7d75

diff --git a/cyclegraph.h b/cyclegraph.h
index df9d46c..42866a3 100644
--- a/cyclegraph.h
+++ b/cyclegraph.h
@@ -1,9 +1,15 @@
+/** @file cyclegraph.h @brief Data structure to track ordering
+ *  constraints on modification order.  The idea is to see whether a
+ *  total order exists that satisfies the ordering constriants.*/
+
 #ifndef CYCLEGRAPH_H
 #define CYCLEGRAPH_H
 
 #include "hashtable.h"
 #include <vector>
 #include <inttypes.h>
+#include "config.h"
+#include "mymemory.h"
 
 class CycleNode;
 class ModelAction;
@@ -12,27 +18,72 @@ class ModelAction;
 class CycleGraph {
  public:
 	CycleGraph();
-	void addEdge(ModelAction *from, ModelAction *to);
+	~CycleGraph();
+	void addEdge(const ModelAction *from, const ModelAction *to);
 	bool checkForCycles();
+	bool checkForRMWViolation();
+	void addRMWEdge(const ModelAction *from, const ModelAction *rmw);
+
+	bool checkReachable(const ModelAction *from, const ModelAction *to);
+	void startChanges();
+	void commitChanges();
+	void rollbackChanges();
+#if SUPPORT_MOD_ORDER_DUMP
+	void dumpNodes(FILE *file);
+	void dumpGraphToFile(const char * filename);
+#endif
 
+	SNAPSHOTALLOC
  private:
-	CycleNode * getNode(ModelAction *);
-	HashTable<ModelAction *, CycleNode *, uintptr_t, 4> actionToNode;
+	CycleNode * getNode(const ModelAction *);
+
+	/** @brief A table for mapping ModelActions to CycleNodes */
+	HashTable<const ModelAction *, CycleNode *, uintptr_t, 4> actionToNode;
+#if SUPPORT_MOD_ORDER_DUMP
+	std::vector<CycleNode *> nodeList;
+#endif
+
 	bool checkReachable(CycleNode *from, CycleNode *to);
 
+	/** @brief A flag: true if this graph contains cycles */
 	bool hasCycles;
+	bool oldCycles;
+
+	bool hasRMWViolation;
+	bool oldRMWViolation;
 
+	std::vector<CycleNode *> rollbackvector;
+	std::vector<CycleNode *> rmwrollbackvector;
 };
 
+/** @brief A node within a CycleGraph; corresponds to one ModelAction */
 class CycleNode {
  public:
-	CycleNode(ModelAction *action);
-	void addEdge(CycleNode * node);
+	CycleNode(const ModelAction *action);
+	bool addEdge(CycleNode * node);
 	std::vector<CycleNode *> * getEdges();
+	bool setRMW(CycleNode *);
+	CycleNode* getRMW();
+	const ModelAction * getAction() {return action;};
+
+	void popEdge() {
+		edges.pop_back();
+	};
+	void clearRMW() {
+		hasRMW=NULL;
+	}
 
+	SNAPSHOTALLOC
  private:
-	ModelAction *action;
+	/** @brief The ModelAction that this node represents */
+	const ModelAction *action;
+
+	/** @brief The edges leading out from this node */
 	std::vector<CycleNode *> edges;
+
+	/** Pointer to a RMW node that reads from this node, or NULL, if none
+	 * exists */
+	CycleNode * hasRMW;
 };
 
 #endif