Method pop_commit

libraries/db/undo_database.cpp:264–300

}

void undo_database::pop_commit()
{
   FC_ASSERT( _active_sessions == 0 );
   FC_ASSERT( !_stack.empty() );

   disable();
   try {
      auto& state = _stack.back();

      for( auto& item : state.old_values )
      {
         _db.modify( _db.get_object( item.second->id ), [&]( object& obj ){ obj.move_from( *item.second ); } );
      }

      for( auto ritr = state.new_ids.begin(); ritr != state.new_ids.end(); ++ritr  )
      {
         _db.remove( _db.get_object(*ritr) );
      }

      for( auto& item : state.old_index_next_ids )
      {
         _db.get_mutable_index( item.first.space(), item.first.type() ).set_next_id( item.second );
      }

      for( auto& item : state.removed )
         _db.insert( std::move(*item.second) );

      _stack.pop_back();
   }
   catch ( const fc::exception& e )
   {
      elog( "error popping commit ${e}", ("e", e.to_detail_string() )  );
      enable();
      throw;
   }
   enable();
}
const undo_state& undo_database::head()const
{
   FC_ASSERT( !_stack.empty() );