pbs.hh
Go to the documentation of this file.00001 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */ 00002 /* 00003 * Main authors: 00004 * Christian Schulte <schulte@gecode.org> 00005 * 00006 * Copyright: 00007 * Christian Schulte, 2015 00008 * 00009 * Last modified: 00010 * $Date: 2016-04-19 17:19:45 +0200 (Tue, 19 Apr 2016) $ by $Author: schulte $ 00011 * $Revision: 14967 $ 00012 * 00013 * This file is part of Gecode, the generic constraint 00014 * development environment: 00015 * http://www.gecode.org 00016 * 00017 * Permission is hereby granted, free of charge, to any person obtaining 00018 * a copy of this software and associated documentation files (the 00019 * "Software"), to deal in the Software without restriction, including 00020 * without limitation the rights to use, copy, modify, merge, publish, 00021 * distribute, sublicense, and/or sell copies of the Software, and to 00022 * permit persons to whom the Software is furnished to do so, subject to 00023 * the following conditions: 00024 * 00025 * The above copyright notice and this permission notice shall be 00026 * included in all copies or substantial portions of the Software. 00027 * 00028 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 00029 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 00030 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 00031 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 00032 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 00033 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 00034 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 00035 * 00036 */ 00037 00038 #ifndef __GECODE_SEARCH_META_SEQUENTIAL_PBS_HH__ 00039 #define __GECODE_SEARCH_META_SEQUENTIAL_PBS_HH__ 00040 00041 #include <gecode/search.hh> 00042 00043 namespace Gecode { namespace Search { namespace Meta { namespace Sequential { 00044 00046 class SharedStopInfo { 00047 public: 00049 bool done; 00051 unsigned long int l; 00052 }; 00053 00055 class GECODE_SEARCH_EXPORT PortfolioStop : public Stop { 00056 private: 00058 Stop* so; 00060 SharedStopInfo* ssi; 00061 public: 00063 PortfolioStop(Stop* so); 00065 void share(SharedStopInfo* ssi); 00067 virtual bool stop(const Statistics& s, const Options& o); 00068 }; 00069 00071 class Slave { 00072 protected: 00074 Engine* slave; 00076 Stop* stop; 00077 public: 00079 void init(Engine* s, Stop* so); 00081 Space* next(void); 00083 Statistics statistics(void) const; 00085 bool stopped(void) const; 00087 void constrain(const Space& b); 00089 void run(void); 00091 ~Slave(void); 00092 }; 00093 00095 template<bool best> 00096 class GECODE_SEARCH_EXPORT PBS : public Engine { 00097 protected: 00099 Statistics stat; 00101 SharedStopInfo ssi; 00103 unsigned int slice; 00105 Slave* slaves; 00107 unsigned int n_slaves; 00109 unsigned int cur; 00111 bool slave_stop; 00112 public: 00114 PBS(Engine** slaves, Stop** stops, unsigned int n, 00115 const Statistics& stat, const Search::Options& opt); 00117 virtual Space* next(void); 00119 virtual Statistics statistics(void) const; 00121 virtual bool stopped(void) const; 00123 virtual void constrain(const Space& b); 00125 virtual ~PBS(void); 00126 }; 00127 00128 }}}} 00129 00130 #include <gecode/search/meta/sequential/pbs.hpp> 00131 00132 #endif 00133 00134 // STATISTICS: search-meta