--- a/src/parallel_execution/context.h	Thu Nov 10 10:35:48 2016 +0900
+++ b/src/parallel_execution/context.h	Thu Nov 10 12:07:53 2016 +0900
@@ -12,22 +12,22 @@
 
 #define ALLOC_DATA(context, dseg) ({\
     struct Meta* meta = (struct Meta*)context->heap;\
-    meta->type = dseg;\
+    meta->type = D_##dseg;\
     context->heap += sizeof(struct Meta);\
-    context->data[dseg] = context->heap; context->heap += sizeof(struct dseg); (struct dseg *)context->data[dseg]; })
+    context->data[D_##dseg] = context->heap; context->heap += sizeof(struct dseg); (struct dseg *)context->data[D_##dseg]; })
 
 #define ALLOC_DATA_TYPE(context, dseg, t) ({\
     struct Meta* meta = (struct Meta*)context->heap;\
-    meta->type = t;\
+    meta->type = D_##t;\
     context->heap += sizeof(struct Meta);\
-    context->data[dseg] = context->heap; context->heap += sizeof(struct t); (struct t *)context->data[dseg]; })
+    context->data[D_##dseg] = context->heap; context->heap += sizeof(struct t); (struct t *)context->data[D_##dseg]; })
 
 #define ALLOCATE(context, t) ({ \
     struct Meta* meta = (struct Meta*)context->heap;\
     context->heap += sizeof(struct Meta);\
     union Data* data = context->heap; \
     context->heap += sizeof(struct t); \
-    meta->type = t; \
+    meta->type = D_##t; \
     data; })
 
 #define GET_TYPE(dseg) ({ \
@@ -111,20 +111,20 @@
 };
 
 enum DataType {
-    Worker,
-    Allocate,
-    SingleLinkedStack,
-    Stack,
-    Tree,
-    Traverse,
-    RotateTree,
-    Node,
-    LoopCounter,
-    Time,
-    Element,
-    ActiveQueue,
-    WaitQueue,
-    Queue
+    D_Worker,
+    D_Allocate,
+    D_SingleLinkedStack,
+    D_Stack,
+    D_Tree,
+    D_Traverse,
+    D_RotateTree,
+    D_Node,
+    D_LoopCounter,
+    D_Time,
+    D_Element,
+    D_ActiveQueue,
+    D_WaitQueue,
+    D_Queue
 };
 
 struct Context {