X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=action.h;h=fff6bc8226990010bae9270a021d606f0cd5fa05;hb=b6b969bf49d31f44e736e67b95f98b7f834f54f1;hp=f9c6d417084e62d39956ad1b1775c236b7bc48b8;hpb=c0182a11fd62cc38f9f5cbe49960d7a9bce8d381;p=c11tester.git

diff --git a/action.h b/action.h
index f9c6d417..fff6bc82 100644
--- a/action.h
+++ b/action.h
@@ -13,16 +13,23 @@
 #include "mymemory.h"
 #include "clockvector.h"
 
-#define VALUE_NONE -1
+/** Note that this value can be legitimately used by a program, and
+		hence by iteself does not indicate no value. */
 
+#define VALUE_NONE 1234567890
+
+/** @brief Represents an action type, identifying one of several types of
+ * ModelAction */
 typedef enum action_type {
-	THREAD_CREATE,
-	THREAD_YIELD,
-	THREAD_JOIN,
-	ATOMIC_READ,
-	ATOMIC_WRITE,
-	ATOMIC_RMW,
-	ATOMIC_INIT
+	THREAD_CREATE,        /**< A thread creation action */
+	THREAD_START,         /**< First action in each thread */
+	THREAD_YIELD,         /**< A thread yield action */
+	THREAD_JOIN,          /**< A thread join action */
+	ATOMIC_READ,          /**< An atomic read action */
+	ATOMIC_WRITE,         /**< An atomic write action */
+	ATOMIC_RMW,           /**< An atomic read-modify-write action */
+	ATOMIC_INIT           /**< Initialization of an atomic object (e.g.,
+	                       *   atomic_init()) */
 } action_type_t;
 
 /* Forward declaration */
@@ -34,7 +41,7 @@ class ClockVector;
  */
 class ModelAction {
 public:
-	ModelAction(action_type_t type, memory_order order, void *loc, int value = VALUE_NONE);
+	ModelAction(action_type_t type, memory_order order, void *loc, uint64_t value = VALUE_NONE);
 	~ModelAction();
 	void print(void) const;
 
@@ -43,11 +50,11 @@ public:
 	memory_order get_mo() const { return order; }
 	void * get_location() const { return location; }
 	modelclock_t get_seq_number() const { return seq_number; }
-	int get_value() const { return value; }
+	uint64_t get_value() const { return value; }
+	const ModelAction * get_reads_from() const { return reads_from; }
 
 	Node * get_node() const { return node; }
 	void set_node(Node *n) { node = n; }
-	void set_value(int val) { value = val; }
 
 	bool is_read() const;
 	bool is_write() const;
@@ -73,6 +80,8 @@ public:
 		return get_seq_number() > act.get_seq_number();
 	}
 
+	void upgrade_rmw(ModelAction * act);
+
 	MEMALLOC
 private:
 
@@ -87,15 +96,17 @@ private:
 
 	/** The thread id that performed this action. */
 	thread_id_t tid;
-	
-	/** The value read or written (if RMW, then the value written). This
-	 * should probably be something longer. */
-	int value;
+
+	/** The value written (for write or RMW; undefined for read) */
+	uint64_t value;
+
+	/** The action that this action reads from. Only valid for reads */
+	const ModelAction *reads_from;
 
 	/** A back reference to a Node in NodeStack, if this ModelAction is
 	 * saved on the NodeStack. */
 	Node *node;
-	
+
 	modelclock_t seq_number;
 
 	/** The clock vector stored with this action; only needed if this