--- a/src/parallel_execution/context.h	Tue Nov 21 09:28:27 2017 +0900
+++ b/src/parallel_execution/context.h	Sun Nov 26 04:26:44 2017 +0900
@@ -232,6 +232,7 @@
     struct SynchronizedQueue {
         struct Element* top;
         struct Element* last;
+        struct Atomic* atomic;
     } SynchronizedQueue;
     // Stack Interface
     struct Stack {
@@ -303,13 +304,14 @@
     } Node;
     struct Atomic {
         union Data* atomic;
-        union Data* data;
+        union Data** ptr;
+        union Data* oldData;
+        union Data* newData;
         enum Code checkAndSet;
         enum Code next;
         enum Code fail;
     } Atomic;
     struct AtomicReference {
-        union Data* data;
     } AtomicReference;
     struct Semaphore {
         union Data* semaphore;