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support.hh
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1/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
2/*
3 * Main authors:
4 * Christian Schulte <schulte@gecode.org>
5 *
6 * Copyright:
7 * Christian Schulte, 2008
8 *
9 * This file is part of Gecode, the generic constraint
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33
34#ifndef __GECODE_SEARCH_SUPPORT_HH__
35#define __GECODE_SEARCH_SUPPORT_HH__
36
37#include <gecode/search.hh>
38
39namespace Gecode { namespace Search {
40
42 forceinline Space*
43 snapshot(Space* s, const Options& o);
44
46 template<class Worker>
47 class WorkerToEngine : public Engine {
48 protected:
51 public:
53 WorkerToEngine(Space* s, const Options& o);
55 virtual Space* next(void);
57 virtual Search::Statistics statistics(void) const;
59 virtual bool stopped(void) const;
61 virtual void constrain(const Space& b);
63 virtual void reset(Space* s);
65 virtual NoGoods& nogoods(void);
66 };
67
68
69
71 snapshot(Space* s, const Options& o) {
72 return o.clone ? s->clone() : s;
73 }
74
75
76 template<class Worker>
79 template<class Worker>
80 Space*
82 return w.next();
83 }
84 template<class Worker>
87 return w.statistics();
88 }
89 template<class Worker>
90 bool
92 return w.stopped();
93 }
94 template<class Worker>
95 void
99 template<class Worker>
100 void
102 w.constrain(b);
103 }
104 template<class Worker>
105 NoGoods&
107 return w.nogoods();
108 }
109
110}}
111
112#endif
113
114// STATISTICS: search-other
struct Gecode::@603::NNF::@65::@66 b
For binary nodes (and, or, eqv)
No-goods recorded from restarts.
Definition core.hpp:1588
Search engine implementation interface
Definition search.hh:899
Search engine options
Definition search.hh:746
bool clone
Whether engines create a clone when being initialized.
Definition search.hh:749
Search engine statistics
Definition search.hh:147
Virtualize a worker to an engine.
Definition support.hh:47
virtual void reset(Space *s)
Reset engine to restart at space s.
Definition support.hh:96
virtual void constrain(const Space &b)
Constrain future solutions to be better than b.
Definition support.hh:101
WorkerToEngine(Space *s, const Options &o)
Initialization.
Definition support.hh:77
virtual bool stopped(void) const
Check whether engine has been stopped.
Definition support.hh:91
Worker w
The worker to wrap into an engine.
Definition support.hh:50
virtual NoGoods & nogoods(void)
Return no-goods.
Definition support.hh:106
virtual Search::Statistics statistics(void) const
Return statistics.
Definition support.hh:86
virtual Space * next(void)
Return next solution (NULL, if none exists or search has been stopped)
Definition support.hh:81
Search worker statistics
Definition worker.hh:44
Computation spaces.
Definition core.hpp:1742
Space * clone(CloneStatistics &stat=unused_clone) const
Clone space.
Definition core.hpp:3224
Space * snapshot(Space *s, const Options &o)
Clone space s dependening on options o.
Definition support.hh:71
Gecode toplevel namespace
#define forceinline
Definition config.hpp:187