text: // Copyright (c) 2012-2017, The CryptoNote developers, The Bytecoin developers
  // Copyright (c) 2018-2021, The Qwertycoin Group.
  //
  // This file is part of Qwertycoin.
  //
  // Qwertycoin is free software: you can redistribute it and/or modify
  // it under the terms of the GNU Lesser General Public License as published by
  // the Free Software Foundation, either version 3 of the License, or
  // (at your option) any later version.
  //
  // Qwertycoin is distributed in the hope that it will be useful,
  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  // GNU Lesser General Public License for more details.
  //
  // You should have received a copy of the GNU Lesser General Public License
  // along with Qwertycoin.  If not, see <http://www.gnu.org/licenses/>.
  
  #pragma once
  
  #include <time.h>
  
  namespace CryptoNote {
  
  class OnceInInterval
  {
  public:
      explicit OnceInInterval(unsigned interval, bool startNow = true)
          : m_interval(interval),
            m_lastCalled(startNow ? 0 : time(nullptr))
      {
      }
  
      template<class F>
      bool call(F func)
      {
          time_t currentTime = time(nullptr);
  
          if (currentTime - m_lastCalled > m_interval) {
              bool res = func();
              time(&m_lastCalled);
              return res;
          }
  
          return true;
      }
  
  private:
      time_t m_lastCalled;
      time_t m_interval;
  };
  
  } // namespace CryptoNote
  