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detectable.hpp
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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, 2009
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9  * Last modified:
10  * $Date: 2012-09-07 17:31:22 +0200 (Fri, 07 Sep 2012) $ by $Author: schulte $
11  * $Revision: 13068 $
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37 
38 namespace Gecode { namespace Int { namespace Unary {
39 
40  template<class ManTaskView>
43  sort<ManTaskView,STO_ECT,true>(t);
44 
45  Region r(home);
46 
49  int* est = r.alloc<int>(t.size());
50 
51  for (int i=0; i<t.size(); i++) {
52  while (q() && (t[i].ect() > t[q.task()].lst())) {
53  o.insert(q.task()); ++q;
54  }
55  est[i] = o.ect(i);
56  }
57 
58  for (int i=t.size(); i--; )
59  GECODE_ME_CHECK(t[i].est(home,est[i]));
60 
61  return ES_OK;
62  }
63 
64  template<class ManTask>
68  GECODE_ES_CHECK(detectable(home,f));
70  return detectable(home,b);
71  }
72 
73 
74  template<class OptTaskView>
77  sort<OptTaskView,STO_ECT,true>(t);
78 
79  Region r(home);
80 
83  int* est = r.alloc<int>(t.size());
84 
85  for (int i=0; i<t.size(); i++) {
86  while (q() && (t[i].ect() > t[q.task()].lst())) {
87  o.insert(q.task()); ++q;
88  }
89  est[i] = o.ect(i);
90  }
91 
92  int n = t.size();
93  for (int i=n; i--; )
94  if (t[i].mandatory()) {
95  GECODE_ME_CHECK(t[i].est(home,est[i]));
96  } else if (est[i] > t[i].lst()) {
97  GECODE_ME_CHECK(t[i].excluded(home));
98  t[i].cancel(home,p,Int::PC_INT_BND); t[i]=t[--n];
99  }
100  t.size(n);
101 
102  return (t.size() < 2) ? home.ES_SUBSUMED(p) : ES_OK;
103  }
104 
105  template<class OptTask>
106  ExecStatus
109  GECODE_ES_CHECK(detectable(home,p,f));
111  return detectable(home,p,b);
112  }
113 
114 }}}
115 
116 // STATISTICS: int-prop
NodeType t
Type of node.
Definition: bool-expr.cpp:234
Task view array.
Definition: task.hh:233
ExecStatus ES_SUBSUMED(Propagator &p)
Definition: core.hpp:2973
Base-class for propagators.
Definition: core.hpp:755
Handle to region.
Definition: region.hpp:61
Computation spaces.
Definition: core.hpp:1362
void insert(int i)
Insert task with index i.
Definition: tree.hpp:68
#define GECODE_ES_CHECK(es)
Check whether execution status es is failed or subsumed, and forward failure or subsumption.
Definition: macros.hpp:84
int p
Number of positive literals for node type.
Definition: bool-expr.cpp:236
Omega trees for computing ect of task sets.
Definition: unary.hh:674
Gecode::IntArgs i(4, 1, 2, 3, 4)
int n
Number of negative literals for node type.
Definition: bool-expr.cpp:238
NNF * r
Right subtree.
Definition: bool-expr.cpp:246
const Gecode::PropCond PC_INT_BND
Propagate when minimum or maximum of a view changes.
Definition: var-type.hpp:91
Allows to iterate over task views according to a specified order.
Definition: task.hh:309
ExecStatus detectable(Space &home, TaskViewArray< ManTaskView > &t)
Definition: detectable.hpp:42
int size(void) const
Return size of array (number of elements)
Definition: array.hpp:139
#define GECODE_ME_CHECK(me)
Check whether modification event me is failed, and forward failure.
Definition: macros.hpp:45
int task(void) const
Return current task position.
Definition: iter.hpp:72
ExecStatus
Definition: core.hpp:523
int ect(void) const
Return earliest completion time of all tasks.
Definition: tree.hpp:83
#define forceinline
Definition: config.hpp:132
Allows to iterate over mandatory task views according to a specified order.
Definition: task.hh:339
Execution is okay.
Definition: core.hpp:527
struct Gecode::@518::NNF::@57::@58 b
For binary nodes (and, or, eqv)
Gecode toplevel namespace