From 1a75079a60d2788bad4ee82378182abcfade51c8 Mon Sep 17 00:00:00 2001
From: Brian Norris <banorris@uci.edu>
Date: Fri, 25 May 2012 19:13:36 -0700
Subject: [PATCH] action: add create_cv() and read_from()

These functions provide basic wrapper functionality for creating and updating
the clock vector for a particular ModelAction.
---
 action.cc | 18 ++++++++++++++++++
 action.h  |  5 +++++
 2 files changed, 23 insertions(+)

diff --git a/action.cc b/action.cc
index 1fe4c7f..b0d8fc9 100644
--- a/action.cc
+++ b/action.cc
@@ -3,6 +3,7 @@
 #include "model.h"
 #include "action.h"
 #include "clockvector.h"
+#include "common.h"
 
 ModelAction::ModelAction(action_type_t type, memory_order order, void *loc, int value)
 {
@@ -81,6 +82,23 @@ bool ModelAction::is_dependent(ModelAction *act)
 	return false;
 }
 
+void ModelAction::create_cv(ModelAction *parent)
+{
+	ASSERT(cv == NULL);
+	if (parent)
+		cv = new ClockVector(parent->cv, this);
+	else
+		cv = new ClockVector();
+}
+
+void ModelAction::read_from(ModelAction *act)
+{
+	ASSERT(cv);
+	if (act->is_release() && this->is_acquire())
+		cv->merge(act->cv);
+	value = act->value;
+}
+
 void ModelAction::print(void)
 {
 	const char *type_str;
diff --git a/action.h b/action.h
index 98ec873..6214174 100644
--- a/action.h
+++ b/action.h
@@ -2,6 +2,8 @@
 #define __ACTION_H__
 
 #include <list>
+#include <cstddef>
+
 #include "threads.h"
 #include "libatomic.h"
 #include "mymemory.h"
@@ -42,6 +44,9 @@ public:
 	bool same_thread(ModelAction *act);
 	bool is_dependent(ModelAction *act);
 
+	void create_cv(ModelAction *parent = NULL);
+	void read_from(ModelAction *act);
+
 	inline bool operator <(const ModelAction& act) const {
 		return get_seq_number() < act.get_seq_number();
 	}
-- 
2.34.1