#pragma once

#include <atomic.hpp>
#include <backoff.hpp>

namespace tpcc {
namespace solutions {

class TicketLock {
 public:
  // don't change this method

  void Lock() {
    Backoff backoff{};
    while (locked.exchange(true)) {
      backoff();
    }
  }

  bool TryLock() {
    return !locked.exchange(true);
  }

  // don't change this method
  void Unlock() {
    locked.store(false);
  }

 private:
   atomic<bool> locked;
};

} // namespace solutions
} // namespace tpcc