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pbs.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, 2015
8 *
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33
34#ifndef __GECODE_SEARCH_SEQ_PBS_HH__
35#define __GECODE_SEARCH_SEQ_PBS_HH__
36
37#include <gecode/search.hh>
38
39namespace Gecode { namespace Search { namespace Seq {
40
43 public:
45 bool done;
47 unsigned long int l;
48 };
49
52 private:
54 Stop* so;
56 SharedStopInfo* ssi;
57 public:
61 void share(SharedStopInfo* ssi);
63 virtual bool stop(const Statistics& s, const Options& o);
64 };
65
67 class Slave {
68 protected:
73 public:
75 void init(Engine* s, Stop* so);
77 Space* next(void);
79 Statistics statistics(void) const;
81 bool stopped(void) const;
83 void constrain(const Space& b);
85 void run(void);
87 ~Slave(void);
88 };
89
91 template<bool best>
93 protected:
99 unsigned int slice;
103 unsigned int n_slaves;
105 unsigned int cur;
108 public:
110 PBS(Engine** slaves, Stop** stops, unsigned int n,
111 const Statistics& stat, const Search::Options& opt);
113 virtual Space* next(void);
115 virtual Statistics statistics(void) const;
117 virtual bool stopped(void) const;
119 virtual void constrain(const Space& b);
121 virtual ~PBS(void);
122 };
123
124}}}
125
127
128#endif
129
130// STATISTICS: search-seq
struct Gecode::@603::NNF::@65::@66 b
For binary nodes (and, or, eqv)
int n
Number of negative literals for node type.
Search engine implementation interface
Definition search.hh:899
Search engine options
Definition search.hh:746
Sequential portfolio engine implementation.
Definition pbs.hh:92
Slave * slaves
Slaves.
Definition pbs.hh:101
SharedStopInfo ssi
Shared slave information.
Definition pbs.hh:97
unsigned int n_slaves
Number of slave engines.
Definition pbs.hh:103
bool slave_stop
Whether a slave has been stopped.
Definition pbs.hh:107
unsigned int slice
Size of a slice.
Definition pbs.hh:99
Statistics stat
Master statistics.
Definition pbs.hh:95
unsigned int cur
Current slave to run.
Definition pbs.hh:105
Stop object used for controling slaves in a portfolio.
Definition pbs.hh:51
Shared stop information.
Definition pbs.hh:42
unsigned long int l
The current failure limit, incremented for each slice.
Definition pbs.hh:47
bool done
Whether search stopped because the slice is done.
Definition pbs.hh:45
Runnable slave of a portfolio master.
Definition pbs.hh:67
bool stopped(void) const
Check whether slave has been stopped.
Definition pbs.hpp:61
Space * next(void)
Return next solution.
Definition pbs.hpp:53
Engine * slave
The slave engine.
Definition pbs.hh:70
void constrain(const Space &b)
Constrain with better solution b.
Definition pbs.hpp:65
Stop * stop
Stop object.
Definition pbs.hh:72
void init(Engine *s, Stop *so)
Initialize with slave s and its stop object so.
Definition pbs.hpp:49
Statistics statistics(void) const
Return statistics of slave.
Definition pbs.hpp:57
~Slave(void)
Delete slave.
Definition pbs.hpp:69
void run(void)
Perform one run.
Search engine statistics
Definition search.hh:147
Base-class for Stop-object.
Definition search.hh:799
Computation spaces.
Definition core.hpp:1742
Gecode toplevel namespace
#define GECODE_SEARCH_EXPORT
Definition search.hh:67