estar/Queue.hpp

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00001 /* 
00002  * Copyright (C) 2005 Roland Philippsen <roland dot philippsen at gmx net>
00003  * 
00004  * This program is free software; you can redistribute it and/or modify
00005  * it under the terms of the GNU General Public License as published by
00006  * the Free Software Foundation; either version 2 of the License, or
00007  * (at your option) any later version.
00008  * 
00009  * This program is distributed in the hope that it will be useful,
00010  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00011  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00012  * GNU General Public License for more details.
00013  * 
00014  * You should have received a copy of the GNU General Public License
00015  * along with this program; if not, write to the Free Software
00016  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
00017  * USA
00018  */
00019 
00020 
00021 #ifndef ESTAR_QUEUE_HPP
00022 #define ESTAR_QUEUE_HPP
00023 
00024 
00025 #include <estar/base.hpp>
00026 #include <map>
00027 
00028 
00029 namespace estar {
00030   
00031   
00032   typedef std::multimap<double, vertex_t> queue_t;
00033   typedef queue_t::iterator queue_it;
00034   typedef queue_t::const_iterator const_queue_it;
00035   
00036   typedef std::map<vertex_t, double> queue_map_t;
00037   
00038   
00041   class Queue {
00042   public:
00043     bool IsEmpty() const { return m_queue.empty(); }
00044     
00045     vertex_t Pop(flag_map_t & flag_map);
00046 
00048     void Requeue(vertex_t vertex,
00049                  flag_map_t & flag_map,
00050                  const value_map_t & value_map,
00051                  const rhs_map_t & rhs_map);
00052     void Clear();
00053     
00059     bool VitaminB(vertex_t vertex);
00060     
00061     const queue_t &     Get() const    { return m_queue; }
00062     const queue_map_t & GetMap() const { return m_map; }
00063     
00064   private:
00065     queue_t m_queue;
00066     queue_map_t m_map;
00067     
00069     void DoDequeue(vertex_t vertex, queue_t::iterator iq);
00070   };
00071   
00072 } // namespace estar
00073 
00074 #endif // ESTAR_QUEUE_HPP

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