#pragma once

#include <functional>
#include <mutex>

class DaliQueryScheduler {
 public:
  static DaliQueryScheduler& instance() {
    static DaliQueryScheduler inst;
    return inst;
  }

  template <typename Fn>
  auto run(Fn&& action) -> decltype(action()) {
    std::lock_guard<std::mutex> lock(mu_);
    return action();
  }

 private:
  DaliQueryScheduler() = default;
  std::mutex mu_;
};