namespace UniTask
{
    public class StepScheduler : IScheduler
    {
        LockQueue<TaskChain> m_taskQueue = new LockQueue<TaskChain>();
        public void Enqueue(TaskChain item)
        {
            m_taskQueue.Enqueue(item);
        }

        TaskChain m_chain;
        public int UpdateAndGetTaskCount()
        {
            if (m_chain != null)
            {
                var status=m_chain.Next();
                if(status==ExecutionStatus.Continue)
                {
                    // m_item継続中
                    return m_taskQueue.Count;
                }
                m_chain = null;
            }

            int count;
            m_chain = m_taskQueue.Dequeue(out count);
            return count;
        }
    }
}