PollTimeout.h

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/*
 * Copyright (C) 2007-2015 Hypertable, Inc.
 *
 * This file is part of Hypertable.
 *
 * Hypertable is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 3
 * of the License, or any later version.
 *
 * Hypertable 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */


#ifndef AsyncComm_PollTimeout_h
#define AsyncComm_PollTimeout_h

#include "Clock.h"

#include <cassert>

namespace Hypertable {


  class PollTimeout {

  public:

    PollTimeout() { }

    void set(ClockT::time_point now, ClockT::time_point expire) {
      assert(std::chrono::operator<=(now, expire));
      auto diff_usec = expire - now;
      duration_ts.tv_sec = diff_usec.count() / 1000000;
      duration_ts.tv_nsec = (diff_usec.count() % 1000000) * 1000;
      ts_ptr = &duration_ts;
      duration_millis = std::chrono::duration_cast<std::chrono::milliseconds>(diff_usec);
    }

    void set_indefinite() {
      ts_ptr = nullptr;
      duration_millis = std::chrono::milliseconds(-1);
    }

    int get_millis() { return duration_millis.count(); }

    struct timespec *get_timespec() { return ts_ptr; }

  private:

    struct timespec *ts_ptr {};

    struct timespec duration_ts;

    std::chrono::milliseconds duration_millis {-1};
  };

}

#endif // AsyncComm_PollTimeout_h