--- a/src/parallel_execution/context.h	Tue Nov 22 10:36:45 2016 +0900
+++ b/src/parallel_execution/context.h	Thu Nov 24 16:29:46 2016 +0900
@@ -129,6 +129,7 @@
     D_Allocate,
     D_SingleLinkedStack,
     D_Stack,
+    D_RedBlackTree,
     D_Tree,
     D_Task,
     D_Traverse,
@@ -139,6 +140,8 @@
     D_Element,
     D_ActiveQueue,
     D_WaitQueue,
+    D_SingleLinkedQueue,
+    D_SynchronizedQueue,
     D_Queue
 };
 
@@ -243,6 +246,7 @@
         enum Code put;
         enum Code get;
         enum Code remove;
+        enum Code clear;
         enum Code next;
     } Tree;
     struct Traverse {
@@ -288,11 +292,13 @@
 typedef struct Task Task;
 typedef struct Queue Queue;
 typedef struct SingleLinkedQueue SingleLinkedQueue;
+typedef struct SynchronizedQueue SynchronizedQueue;
 typedef struct Stack Stack;
 typedef struct SingleLinkedStack SingleLinkedStack;
 typedef struct ArrayStack ArrayStack;
 typedef struct Element Element;
 typedef struct Array Array;
+typedef struct RedBlackTree RedBlackTree;
 typedef struct Tree Tree;
 typedef struct Traverse Traverse;
 typedef struct RotateTree RotateTree;

--- a/src/parallel_execution/dependency.c	Tue Nov 22 10:36:45 2016 +0900
+++ b/src/parallel_execution/dependency.c	Thu Nov 24 16:29:46 2016 +0900
@@ -33,38 +33,23 @@
     goto meta(context, context->next);
 }
 
-__code spawnTask(struct Context* context, struct Element* element, struct Queue* activeQueue, struct Queue* waitQueue) {
-    struct Queue *queue;
+__code spawnTask(struct Context* context, struct Task* task, struct Element* element, struct Queue* queue, struct Queue* activeQueue, struct Queue* waitQueue) {
     if (task->idsCount == 0) {
         // enqueue activeQueue
-        queue = activeQueue;
+        queue->queue = (union Data*)activeQueue;
     } else {
         // enqueue waitQueue
-        queue = waitQueue;
+        queue->queue = (union Data*)waitQueue;
     }
     queue->data = element->data;
     queue->next = context->next;
-    goto meta_spawnTask(context, queue, queue->put);
+    goto meta(context, queue->queue->put);
 }
 
 __code spawnTask_stub(struct Context* context) {
     goto spawnTask(context,
+            context->data[D_Element]->element.data,
             &context->data[D_Element]->element,
-            &context->data[D_ActiveQueue]->queue,
-            &context->data[D_WaitQueue]->queue);
-}
-
-__code taskA(struct Context* context) {
-    printf("TaskA\n");
-    goto meta(context, context->next);
+            &context->data[D_ActiveQueue]->Queue,
+            &context->data[D_WaitQueue]->Queue);
 }
-
-__code taskB(struct Context* context) {
-    printf("TaskB\n");
-    goto meta(context, context->next);
-}
-
-__code taskC(struct Context* context) {
-    printf("TaskC\n");
-    goto meta(context, context->next);
-}