Use the event-handler for timers.

src/vm/heap.h

 // Copyright (c) 2014, the Fletch project authors. Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE.md file.
 
 #ifndef SRC_VM_HEAP_H_
 #define SRC_VM_HEAP_H_
 
 #include "src/shared/globals.h"
 #include "src/shared/random.h"
 #include "src/vm/object.h"
@@ skipping 156 matching lines @@
     Object* object = *p;
     if (!object->IsHeapObject()) return;
     if (!from_->Includes(reinterpret_cast<uword>(object))) return;
     *p = reinterpret_cast<HeapObject*>(object)->CloneInToSpace(to_);
   }
 
   Space* from_;
   Space* to_;
 };
 
-// Extract a raw void* pointer from [object].
+// Read [object] as an integer word value.
 //
 // [object] must be either a Smi or a LargeInteger.
 inline word AsForeignWord(Object* object) {
   return object->IsSmi()
       ? Smi::cast(object)->value()
       : LargeInteger::cast(object)->value();
 }
 
+// Read [object] as an integer int64 value.
+//
+// [object] must be either a Smi or a LargeInteger.
+inline int64 AsForeignInt64(Object* object) {
+  return object->IsSmi()
+      ? Smi::cast(object)->value()
+      : LargeInteger::cast(object)->value();
+}
+
 
 }  // namespace fletch
 
 
 #endif  // SRC_VM_HEAP_H_