--- a/src/parallel_execution/worker.c	Tue Jan 24 18:39:42 2017 +0900
+++ b/src/parallel_execution/worker.c	Wed Jan 25 01:48:47 2017 +0900
@@ -9,7 +9,7 @@
     struct Worker* worker = ALLOC(context, Worker);
     struct CPUWorker* cpuWorker = ALLOC(context, CPUWorker);
     worker->worker = (union Data*)cpuWorker;
-    cpuWorker->tasks = queue;
+    worker->tasks = queue;
     cpuWorker->id = id;
     worker->taskReceive = C_taskReceiveWorker;
     worker->shutdown = C_shutdownWorker;
@@ -25,15 +25,14 @@
     goto meta(cpuWorker->context, C_taskReceiveWorker);
 }
 
-__code taskReceiveWorker(struct Context* context, CPUWorker* worker) {
+__code taskReceiveWorker(struct Context* context, Worker* worker) {
     Queue* queue = worker->tasks;
     queue->next = C_getTask1;
     goto meta(context, queue->take);
 }
 
 __code taskReceiveWorker_stub(struct Context* context) {
-    CPUWorker* worker = (CPUWorker *)GearImpl(context, Worker, worker);
-    goto taskReceiveWorker(context,worker);
+    goto taskReceiveWorker(context, Gearef(context, Worker));
 }
 
 __code getTask1(struct Context* context, Worker* worker, struct Context* task) {
@@ -45,8 +44,7 @@
 
 __code getTask1_stub(struct Context* context) {
     Worker* worker = Gearef(context,Worker);
-    CPUWorker* cpuWorker = (CPUWorker *)GearImpl(context, Worker, worker);
-    Context* task = &cpuWorker->tasks->data->context; 
+    Context* task = &worker->tasks->data->context; 
     goto getTask1(context,worker,task);
 }