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dead.cpp
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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, 2015
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33 
35 
36 namespace Gecode { namespace Search { namespace Seq {
37 
39  template<class Tracer>
40  class GECODE_SEARCH_EXPORT Dead : public Engine {
41  protected:
46  public:
48  Dead(const Options& o, const Statistics& stat0);
50  virtual Space* next(void);
52  virtual Statistics statistics(void) const;
54  virtual bool stopped(void) const;
56  virtual ~Dead(void);
57  };
58 
59  template<class Tracer>
60  Dead<Tracer>::Dead(const Options& o, const Statistics& stat0)
61  : tracer(o.tracer), stat(stat0) {
62  tracer.engine(SearchTracer::EngineType::AOE, 1U);
63  tracer.worker();
64  }
65 
66  template<class Tracer>
67  Space*
69  return NULL;
70  }
71 
72  template<class Tracer>
73  bool
74  Dead<Tracer>::stopped(void) const {
75  return false;
76  }
77 
78  template<class Tracer>
81  return stat;
82  }
83 
84  template<class Tracer>
86  tracer.done();
87  }
88 
89  Engine*
90  dead(const Options& o, const Statistics& stat) {
91  if (o.tracer)
92  return new Dead<TraceRecorder>(o,stat);
93  else
94  return new Dead<NoTraceRecorder>(o,stat);
95  }
96 
97 
98 }}}
99 
100 // STATISTICS: search-seq
Search engine implementation interface
Definition: search.hh:899
Search engine options
Definition: search.hh:746
SearchTracer * tracer
Tracer object for tracing search.
Definition: search.hh:769
A dead engine (failed root)
Definition: dead.cpp:40
Tracer tracer
Search tracer.
Definition: dead.cpp:43
Statistics stat
Statistics.
Definition: dead.cpp:45
Dead(const Options &o, const Statistics &stat0)
Initialize.
Definition: dead.cpp:60
virtual ~Dead(void)
Delete.
Definition: dead.cpp:85
virtual Space * next(void)
Return next solution (NULL, if none exists or search has been stopped)
Definition: dead.cpp:68
virtual bool stopped(void) const
Check whether engine has been stopped.
Definition: dead.cpp:74
virtual Statistics statistics(void) const
Return statistics.
Definition: dead.cpp:80
Search engine statistics
Definition: search.hh:147
Computation spaces.
Definition: core.hpp:1742
Tracer.
Definition: tracer.hpp:149
Engine * dead(const Options &o, const Statistics &stat)
Definition: dead.cpp:90
#define GECODE_SEARCH_EXPORT
Definition: search.hh:67