+void ModelAction::copy_typeandorder(ModelAction * act)
+{
+ this->type = act->type;
+ this->order = act->order;
+}
+
+/**
+ * Get the Thread which is the operand of this action. This is only valid for
+ * THREAD_* operations (currently only for THREAD_CREATE and THREAD_JOIN). Note
+ * that this provides a central place for determining the conventions of Thread
+ * storage in ModelAction, where we generally aren't very type-safe (e.g., we
+ * store object references in a (void *) address.
+ *
+ * For THREAD_CREATE, this yields the Thread which is created.
+ * For THREAD_JOIN, this yields the Thread we are joining with.
+ *
+ * @return The Thread which this action acts on, if exists; otherwise NULL
+ */
+Thread * ModelAction::get_thread_operand() const
+{
+ if (type == THREAD_CREATE)
+ /* THREAD_CREATE uses (Thread *) for location */
+ return (Thread *)get_location();
+ else if (type == THREAD_JOIN)
+ /* THREAD_JOIN uses (Thread *) for location */
+ return (Thread *)get_location();
+ else
+ return NULL;