search.hh
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00040 #ifndef __GECODE_SEARCH_HH__
00041 #define __GECODE_SEARCH_HH__
00042
00043 #include <gecode/kernel.hh>
00044
00045
00046
00047
00048
00049 #if !defined(GECODE_STATIC_LIBS) && \
00050 (defined(__CYGWIN__) || defined(__MINGW32__) || defined(_MSC_VER))
00051
00052 #ifdef GECODE_BUILD_SEARCH
00053 #define GECODE_SEARCH_EXPORT __declspec( dllexport )
00054 #else
00055 #define GECODE_SEARCH_EXPORT __declspec( dllimport )
00056 #endif
00057
00058 #else
00059
00060 #ifdef GECODE_GCC_HAS_CLASS_VISIBILITY
00061 #define GECODE_SEARCH_EXPORT __attribute__ ((visibility("default")))
00062 #else
00063 #define GECODE_SEARCH_EXPORT
00064 #endif
00065
00066 #endif
00067
00068
00069 #ifndef GECODE_BUILD_SEARCH
00070 #define GECODE_LIBRARY_NAME "Search"
00071 #include <gecode/support/auto-link.hpp>
00072 #endif
00073
00074
00075 namespace Gecode {
00076
00078 namespace Search {
00079
00085 namespace Config {
00087 const bool clone = true;
00089 const double threads = 1.0;
00091 const unsigned int c_d = 8;
00093 const unsigned int a_d = 2;
00094
00096 const unsigned int steal_limit = 3;
00098 const unsigned int initial_delay = 5;
00099 }
00100
00105 class Statistics : public StatusStatistics {
00106 public:
00108 unsigned long int fail;
00110 unsigned long int node;
00112 unsigned long int depth;
00114 size_t memory;
00116 Statistics(void);
00118 void reset(void);
00120 Statistics operator +(const Statistics& s);
00122 Statistics& operator +=(const Statistics& s);
00123 };
00124
00125 class Stop;
00126
00164 class Options {
00165 public:
00167 bool clone;
00169 double threads;
00171 unsigned int c_d;
00173 unsigned int a_d;
00175 Stop* stop;
00177 GECODE_SEARCH_EXPORT static const Options def;
00179 Options(void);
00181 GECODE_SEARCH_EXPORT Options
00182 expand(void) const;
00183 };
00184
00199 class GECODE_SEARCH_EXPORT Stop {
00200 public:
00202 Stop(void);
00204 virtual bool stop(const Statistics& s, const Options& o) = 0;
00206 virtual ~Stop(void);
00207 };
00208
00214 class GECODE_SEARCH_EXPORT MemoryStop : public Stop {
00215 protected:
00217 size_t l;
00218 public:
00220 MemoryStop(size_t l);
00222 size_t limit(void) const;
00224 void limit(size_t l);
00226 virtual bool stop(const Statistics& s, const Options& o);
00227 };
00228
00237 class GECODE_SEARCH_EXPORT NodeStop : public Stop {
00238 protected:
00240 unsigned long int l;
00241 public:
00243 NodeStop(unsigned long int l);
00245 unsigned long int limit(void) const;
00247 void limit(unsigned long int l);
00249 virtual bool stop(const Statistics& s, const Options& o);
00250 };
00251
00260 class GECODE_SEARCH_EXPORT FailStop : public Stop {
00261 protected:
00263 unsigned long int l;
00264 public:
00266 FailStop(unsigned long int l);
00268 unsigned long int limit(void) const;
00270 void limit(unsigned long int l);
00272 virtual bool stop(const Statistics& s, const Options& o);
00273 };
00274
00279 class GECODE_SEARCH_EXPORT TimeStop : public Stop {
00280 protected:
00282 Support::Timer t;
00284 unsigned long int l;
00285 public:
00287 TimeStop(unsigned long int l);
00289 unsigned long int limit(void) const;
00291 void limit(unsigned long int l);
00293 void reset(void);
00295 virtual bool stop(const Statistics& s, const Options& o);
00296 };
00297
00298
00302 class Engine {
00303 public:
00305 virtual Space* next(void) = 0;
00307 virtual Search::Statistics statistics(void) const = 0;
00309 virtual bool stopped(void) const = 0;
00311 virtual ~Engine(void) {}
00312 };
00313
00315 namespace Sequential {}
00316
00318 namespace Parallel {}
00319
00320 }
00321
00322 }
00323
00324 #include <gecode/search/statistics.hpp>
00325 #include <gecode/search/stop.hpp>
00326 #include <gecode/search/options.hpp>
00327
00328 namespace Gecode {
00329
00337 template<class T>
00338 class DFS {
00339 private:
00341 Search::Engine* e;
00342 public:
00344 DFS(T* s, const Search::Options& o=Search::Options::def);
00346 T* next(void);
00348 Search::Statistics statistics(void) const;
00350 bool stopped(void) const;
00352 ~DFS(void);
00353 };
00354
00356 template<class T>
00357 T* dfs(T* s, const Search::Options& o=Search::Options::def);
00358
00359
00360
00372 template<class T>
00373 class BAB {
00374 private:
00376 Search::Engine* e;
00377 public:
00379 BAB(T* s, const Search::Options& o=Search::Options::def);
00381 T* next(void);
00383 Search::Statistics statistics(void) const;
00385 bool stopped(void) const;
00387 ~BAB(void);
00388 };
00389
00402 template<class T>
00403 T* bab(T* s, const Search::Options& o=Search::Options::def);
00404
00405
00406
00418 template<class T>
00419 class Restart {
00420 private:
00422 Search::Engine* e;
00423 public:
00425 Restart(T* s, const Search::Options& o=Search::Options::def);
00427 T* next(void);
00429 Search::Statistics statistics(void) const;
00431 bool stopped(void) const;
00433 ~Restart(void);
00434 };
00435
00447 template<class T>
00448 T* restart(T* s, const Search::Options& o=Search::Options::def);
00449
00450 }
00451
00452 #include <gecode/search/dfs.hpp>
00453 #include <gecode/search/bab.hpp>
00454 #include <gecode/search/restart.hpp>
00455
00456 #endif
00457
00458