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pbs.hh
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37 
38 #ifndef __GECODE_SEARCH_META_SEQUENTIAL_PBS_HH__
39 #define __GECODE_SEARCH_META_SEQUENTIAL_PBS_HH__
40 
41 #include <gecode/search.hh>
42 
43 namespace Gecode { namespace Search { namespace Meta { namespace Sequential {
44 
47  public:
49  bool done;
51  unsigned long int l;
52  };
53 
56  private:
58  Stop* so;
60  SharedStopInfo* ssi;
61  public:
63  PortfolioStop(Stop* so);
65  void share(SharedStopInfo* ssi);
67  virtual bool stop(const Statistics& s, const Options& o);
68  };
69 
71  class Slave {
72  protected:
77  public:
79  void init(Engine* s, Stop* so);
81  Space* next(void);
83  Statistics statistics(void) const;
85  bool stopped(void) const;
87  void constrain(const Space& b);
89  void run(void);
91  ~Slave(void);
92  };
93 
95  template<bool best>
96  class GECODE_SEARCH_EXPORT PBS : public Engine {
97  protected:
103  unsigned int slice;
107  unsigned int n_slaves;
109  unsigned int cur;
112  public:
114  PBS(Engine** slaves, Stop** stops, unsigned int n,
115  const Statistics& stat, const Search::Options& opt);
117  virtual Space* next(void);
119  virtual Statistics statistics(void) const;
121  virtual bool stopped(void) const;
123  virtual void constrain(const Space& b);
125  virtual ~PBS(void);
126  };
127 
128 }}}}
129 
131 
132 #endif
133 
134 // STATISTICS: search-meta
Search engine implementation interface
Definition: search.hh:601
Statistics stat
Master statistics.
Definition: pbs.hh:99
Search engine statistics
Definition: search.hh:140
#define GECODE_SEARCH_EXPORT
Definition: search.hh:63
unsigned long int l
The current failure limit, incremented for each slice.
Definition: pbs.hh:51
Search engine options
Definition: search.hh:446
Stop * stop
Stop object.
Definition: pbs.hh:76
Space * next(void)
Return next solution.
Definition: pbs.hpp:57
Engine * slave
The slave engine.
Definition: pbs.hh:74
Computation spaces.
Definition: core.hpp:1748
Runnable slave of a portfolio master.
Definition: pbs.hh:71
SharedStopInfo ssi
Shared slave information.
Definition: pbs.hh:101
int n
Number of negative literals for node type.
Definition: bool-expr.cpp:238
Options opt
The options.
Definition: test.cpp:101
unsigned int slice
Size of a slice.
Definition: pbs.hh:103
bool stopped(void) const
Check whether slave has been stopped.
Definition: pbs.hpp:65
void run(void)
Perform one run.
void constrain(const Space &b)
Constrain with better solution b.
Definition: pbs.hpp:69
struct Gecode::@579::NNF::@61::@62 b
For binary nodes (and, or, eqv)
unsigned int cur
Current slave to run.
Definition: pbs.hh:109
Stop * stop(Stop *so)
Create stop object.
Definition: pbs.cpp:43
Stop object used for controling slaves in a portfolio.
Definition: pbs.hh:55
bool done
Whether search stopped because the slice is done.
Definition: pbs.hh:49
void init(Engine *s, Stop *so)
Initialize with slave s and its stop object so.
Definition: pbs.hpp:53
~Slave(void)
Delete slave.
Definition: pbs.hpp:73
bool slave_stop
Whether a slave has been stopped.
Definition: pbs.hh:111
Gecode toplevel namespace
Base-class for Stop-object.
Definition: search.hh:501
Sequential portfolio engine implementation.
Definition: pbs.hh:96
unsigned int n_slaves
Number of slave engines.
Definition: pbs.hh:107
Statistics statistics(void) const
Return statistics of slave.
Definition: pbs.hpp:61