Replace curTick global variable with accessor functions.
This step makes it easy to replace the accessor functions
(which still access a global variable) with ones that access
per-thread curTick values.
diff --git a/src/sim/sim_object.hh b/src/sim/sim_object.hh
index 567288e..d57a56a 100644
--- a/src/sim/sim_object.hh
+++ b/src/sim/sim_object.hh
@@ -131,7 +131,7 @@
/**
* startup() is the final initialization call before simulation.
* All state is initialized (including unserialized state, if any,
- * such as the curTick value), so this is the appropriate place to
+ * such as the curTick() value), so this is the appropriate place to
* schedule initial event(s) for objects that need them.
*/
virtual void startup();
