From: Brian Norris <banorris@uci.edu>
Date: Tue, 4 Dec 2012 00:43:19 +0000 (-0800)
Subject: action: record last fence release from the current thread
X-Git-Tag: oopsla2013~480
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=9bbf98ac065e34fc1c35538328d02d51e74ccc0f;p=model-checker.git

action: record last fence release from the current thread
---

diff --git a/action.cc b/action.cc
index 3d46bd9..5ecc1f0 100644
--- a/action.cc
+++ b/action.cc
@@ -31,6 +31,7 @@ ModelAction::ModelAction(action_type_t type, memory_order order, void *loc,
 	location(loc),
 	value(value),
 	reads_from(NULL),
+	last_fence_release(NULL),
 	node(NULL),
 	seq_number(ACTION_INITIAL_CLOCK),
 	cv(NULL),
diff --git a/action.h b/action.h
index 66ba753..4c40bd9 100644
--- a/action.h
+++ b/action.h
@@ -85,6 +85,12 @@ public:
 	Node * get_node() const { return node; }
 	void set_node(Node *n) { node = n; }
 
+	/** Store the most recent fence-release from the same thread
+	 *  @param fence The fence-release that occured prior to this */
+	void set_last_fence_release(const ModelAction *fence) { last_fence_release = fence; }
+	/** @return The most recent fence-release from the same thread */
+	const ModelAction * get_last_fence_release() const { return last_fence_release; }
+
 	void copy_from_new(ModelAction *newaction);
 	void set_seq_number(modelclock_t num);
 	void set_try_lock(bool obtainedlock);
@@ -158,6 +164,9 @@ private:
 	/** The action that this action reads from. Only valid for reads */
 	const ModelAction *reads_from;
 
+	/** The last fence release from the same thread */
+	const ModelAction *last_fence_release;
+
 	/** A back reference to a Node in NodeStack, if this ModelAction is
 	 * saved on the NodeStack. */
 	Node *node;