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support.hh
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3  * Main authors:
4  * Christian Schulte <schulte@gecode.org>
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7  * Christian Schulte, 2008
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10  * $Date: 2016-04-19 17:19:45 +0200 (Tue, 19 Apr 2016) $ by $Author: schulte $
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37 
38 #ifndef __GECODE_SEARCH_SUPPORT_HH__
39 #define __GECODE_SEARCH_SUPPORT_HH__
40 
41 #include <gecode/search.hh>
42 
43 namespace Gecode { namespace Search {
44 
46  forceinline Space*
47  snapshot(Space* s, const Options& o, bool share=true);
48 
50  template<class Worker>
51  class WorkerToEngine : public Engine {
52  protected:
55  public:
57  WorkerToEngine(Space* s, const Options& o);
59  virtual Space* next(void);
61  virtual Search::Statistics statistics(void) const;
63  virtual bool stopped(void) const;
65  virtual void constrain(const Space& b);
67  virtual void reset(Space* s);
69  virtual NoGoods& nogoods(void);
70  };
71 
72 
73 
75  snapshot(Space* s, const Options& o, bool share) {
76  return o.clone ? s->clone(share) : s;
77  }
78 
79 
80  template<class Worker>
82  : w(s,o) {}
83  template<class Worker>
84  Space*
86  return w.next();
87  }
88  template<class Worker>
91  return w.statistics();
92  }
93  template<class Worker>
94  bool
96  return w.stopped();
97  }
98  template<class Worker>
99  void
101  w.reset(s);
102  }
103  template<class Worker>
104  void
106  w.constrain(b);
107  }
108  template<class Worker>
109  NoGoods&
111  return w.nogoods();
112  }
113 
114 }}
115 
116 #endif
117 
118 // STATISTICS: search-other
Search engine implementation interface
Definition: search.hh:601
Search engine statistics
Definition: search.hh:140
Search engine options
Definition: search.hh:446
virtual bool stopped(void) const
Check whether engine has been stopped.
Definition: support.hh:95
Space * clone(bool share_data=true, bool share_info=true, CloneStatistics &stat=unused_clone) const
Clone space.
Definition: core.hpp:3326
virtual void constrain(const Space &b)
Constrain future solutions to be better than b.
Definition: support.hh:105
Computation spaces.
Definition: core.hpp:1748
virtual Search::Statistics statistics(void) const
Return statistics.
Definition: support.hh:90
struct Gecode::@579::NNF::@61::@62 b
For binary nodes (and, or, eqv)
bool clone
Whether engines create a clone when being initialized.
Definition: search.hh:449
virtual NoGoods & nogoods(void)
Return no-goods.
Definition: support.hh:110
Search worker statistics
Definition: worker.hh:48
virtual void reset(Space *s)
Reset engine to restart at space s.
Definition: support.hh:100
No-goods recorded from restarts.
Definition: core.hpp:1595
#define forceinline
Definition: config.hpp:173
Space * snapshot(Space *s, const Options &o, bool share=true)
Clone space s dependening on options o.
Definition: support.hh:75
virtual Space * next(void)
Return next solution (NULL, if none exists or search has been stopped)
Definition: support.hh:85
Gecode toplevel namespace
Virtualize a worker to an engine.
Definition: support.hh:51
WorkerToEngine(Space *s, const Options &o)
Initialization.
Definition: support.hh:81
Worker w
The worker to wrap into an engine.
Definition: support.hh:54