/*
 * 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