action: record last fence release from the current thread

diff --git a/action.cc b/action.cc
index 3d46bd91aa0de6a2dd1a5729a1867fd3737343b3..5ecc1f0e1b26f069650a47e139858eef68e05595 100644 (file)
--- 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 66ba753b58131bdc1235bfd7276fc1416b8e22f3..4c40bd9bf9a4554ed7c984158334f359346031c5 100644 (file)
--- 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;