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stop.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, 2006
8  *
9  * Last modified:
10  * $Date: 2013-07-11 12:30:18 +0200 (Thu, 11 Jul 2013) $ by $Author: schulte $
11  * $Revision: 13840 $
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37 
38 #include <gecode/search.hh>
39 
40 namespace Gecode { namespace Search {
41 
42  /*
43  * Stopping for node limit
44  *
45  */
46  bool
47  NodeStop::stop(const Statistics& s, const Options&) {
48  return s.node > l;
49  }
50 
51 
52  /*
53  * Stopping for failure limit
54  *
55  */
56  bool
57  FailStop::stop(const Statistics& s, const Options&) {
58  return s.fail > l;
59  }
60 
61 
62  /*
63  * Stopping for time limit
64  *
65  */
66  bool
67  TimeStop::stop(const Statistics&, const Options&) {
68  return t.stop() > l;
69  }
70 
71 
72  /*
73  * Stopping for meta search engines
74  *
75  */
76 
77  bool
78  MetaStop::stop(const Statistics& s, const Options& o) {
79  // Stop if the fail stop object for the engine says so
80  if (e_stop->stop(s,o)) {
81  e_stopped = true;
82  m_stat.restart++;
83  return true;
84  }
85  // Stop if the stop object for the meta engine says so
86  if ((m_stop != NULL) && m_stop->stop(m_stat+s,o)) {
87  e_stopped = false;
88  return true;
89  }
90  return false;
91  }
92 
93 }}
94 
95 // STATISTICS: search-other
Search engine statistics
Definition: search.hh:136
Search engine options
Definition: search.hh:204
unsigned long int l
Current limit in milliseconds.
Definition: search.hh:331
unsigned long int fail
Number of failed nodes in search tree.
Definition: search.hh:139
Support::Timer t
Time when execution should stop.
Definition: search.hh:329
virtual bool stop(const Statistics &s, const Options &o)
Return true if failure limit is exceeded.
Definition: stop.cpp:57
double stop(void)
Get time since start of timer.
Definition: timer.hpp:80
unsigned long int l
Node limit.
Definition: search.hh:287
virtual bool stop(const Statistics &s, const Options &o)
Return true if node limit is exceeded.
Definition: stop.cpp:47
unsigned long int l
Failure limit.
Definition: search.hh:310
unsigned long int restart
Number of restarts.
Definition: search.hh:145
Gecode toplevel namespace
virtual bool stop(const Statistics &s, const Options &o)=0
Stop search, if returns true.
unsigned long int node
Number of nodes expanded.
Definition: search.hh:141
virtual bool stop(const Statistics &s, const Options &o)
Return true if meta engine must be stopped.
Definition: stop.cpp:78
virtual bool stop(const Statistics &s, const Options &o)
Return true if time limit is exceeded.
Definition: stop.cpp:67