danicoin/src/cryptonote_core/OnceInInterval.h

// Copyright (c) 2012-2015, The CryptoNote developers, The Bytecoin developers
//
// This file is part of Bytecoin.
//
// Bytecoin 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.
//
// Bytecoin 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 Bytecoin.  If not, see <http://www.gnu.org/licenses/>.

#pragma once

#include <time.h>

namespace CryptoNote
{

class OnceInInterval {
public:

  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;
};

}