+/**
+ * Compares a current clock-vector/thread-ID pair with a clock/thread-ID pair
+ * to check the potential for a data race.
+ * @param clock1 The current clock vector
+ * @param tid1 The current thread; paired with clock1
+ * @param clock2 The clock value for the potentially-racing action
+ * @param tid2 The thread ID for the potentially-racing action
+ * @return true if the current clock allows a race with the event at clock2/tid2
+ */
+static bool clock_may_race(ClockVector *clock1, thread_id_t tid1,
+ modelclock_t clock2, thread_id_t tid2)
+{
+ return tid1 != tid2 && clock2 != 0 && clock1->getClock(tid2) <= clock2;
+}
+
+/**
+ * Expands a record from the compact form to the full form. This is
+ * necessary for multiple readers or for very large thread ids or time
+ * stamps. */