void
twice_init(TaskManager *manager, int* data, int length)
{
    /**
     * Create Task
     *   create_task(Task ID);
     */
    HTask* twice = manager->create_task(TWICE_TASK);
    
    /**
     * Set of Device
     *   set_cpu(CPU or GPU)
     */
    twice->set_cpu(SPE_ANY);

    /**
     * Set of Input Data
     *   set_inData(index, address of input data, size of input data);
     */
    twice->set_inData(0, data, sizeof(int)*length);
   
    /**
     * Set of OutPut area
     *   set_outData(index, address of output area, size of output area);
     */
    twice->set_outData(0, data, sizeof(int)*length);

    /**
     * Enqueue Task
     *   iterate(Number of Tasks)
     */
    twice->iterate(length);
}