Method GetInstance

euler/client/completion_queue_pool.h:32–36

class CompletionQueuePool {
 public:
  static CompletionQueuePool *GetInstance() {
    static CompletionQueuePool
      completion_queue_pool(std::thread::hardware_concurrency() * 2);
    return &completion_queue_pool;
  }

  CompletionQueuePool(CompletionQueuePool const&) = delete;
  void operator=(CompletionQueuePool const&) = delete;