text: /*
   * Copyright (c) 2015 Cryptonomex, Inc., and contributors.
   *
   * The MIT License
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy
   * of this software and associated documentation files (the "Software"), to deal
   * in the Software without restriction, including without limitation the rights
   * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   * copies of the Software, and to permit persons to whom the Software is
   * furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in
   * all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
   * THE SOFTWARE.
   */
  #pragma once
  
  #include <fc/optional.hpp>
  #include <fc/signals.hpp>
  #include <fc/time.hpp>
  
  namespace graphene { namespace time {
  
     typedef fc::signal<void()> time_discontinuity_signal_type;
     extern time_discontinuity_signal_type time_discontinuity_signal;
  
     fc::optional<fc::time_point> ntp_time();
     fc::time_point               now();
     fc::time_point               nonblocking_now(); // identical to now() but guaranteed not to block
     void                         update_ntp_time();
     fc::microseconds             ntp_error();
     void                         shutdown_ntp_time();
  
     void                         start_simulated_time( const fc::time_point sim_time );
     void                         advance_simulated_time_to( const fc::time_point sim_time );
     void                         advance_time( int32_t delta_seconds );
  
  } } // graphene::time
  