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man-prop.hpp
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2 /*
3  * Main authors:
4  * Christian Schulte <schulte@gecode.org>
5  * Guido Tack <tack@gecode.org>
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8  * Christian Schulte, 2009
9  * Guido Tack, 2010
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39 
40 namespace Gecode { namespace Int { namespace Cumulative {
41 
42  template<class ManTask, class Cap, class PL>
45  : TaskProp<ManTask,PL>(home,t), c(c0) {
46  c.subscribe(home,*this,PC_INT_BND);
47  }
48 
49  template<class ManTask, class Cap, class PL>
52  : TaskProp<ManTask,PL>(home,p) {
53  c.update(home,p.c);
54  }
55 
56  template<class ManTask, class Cap, class PL>
59  // Capacity must be nonnegative
60  GECODE_ME_CHECK(c.gq(home, 0));
61  // Check that tasks do not overload resource
62  for (int i=t.size(); i--; )
63  if (t[i].c() > c.max())
64  return ES_FAILED;
65  if (t.size() == 1)
66  GECODE_ME_CHECK(c.gq(home, t[0].c()));
67  if (t.size() > 1) {
68  if (c.assigned() && c.val()==1) {
70  for (int i=t.size(); i--; )
71  mt[i]=t[i];
73  ::post(home,mt);
74  } else {
75  (void) new (home) ManProp<ManTask,Cap,PL>(home,c,t);
76  }
77  }
78  return ES_OK;
79  }
80 
81  template<class ManTask, class Cap, class PL>
82  Actor*
84  return new (home) ManProp<ManTask,Cap,PL>(home,*this);
85  }
86 
87  template<class ManTask, class Cap, class PL>
88  forceinline size_t
90  (void) TaskProp<ManTask,PL>::dispose(home);
91  c.cancel(home,*this,PC_INT_BND);
92  return sizeof(*this);
93  }
94 
95  template<class ManTask, class Cap, class PL>
98  // Only bounds changes?
99  if (IntView::me(med) != ME_INT_DOM)
100  GECODE_ES_CHECK(overload(home,c.max(),t));
101 
102  if (PL::advanced)
103  GECODE_ES_CHECK(edgefinding(home,c.max(),t));
104 
105  if (PL::basic)
106  GECODE_ES_CHECK(timetabling(home,*this,c,t));
107 
108  if (Cap::varderived() && c.assigned() && (c.val() == 1)) {
109  // Check that tasks do not overload resource
110  for (int i=t.size(); i--; )
111  if (t[i].c() > 1)
112  return ES_FAILED;
113  // Rewrite to unary resource constraint
115  for (int i=t.size(); i--;)
116  ut[i]=t[i];
117  GECODE_REWRITE(*this,
119  ::post(home(*this),ut)));
120  }
121 
122  if (!PL::basic && c.assigned())
123  GECODE_ES_CHECK(subsumed(home,*this,c.val(),t));
124 
125  return ES_NOFIX;
126  }
127 
128 }}}
129 
130 // STATISTICS: int-prop
#define GECODE_REWRITE(prop, post)
Rewrite propagator by executing post function.
Definition: macros.hpp:120
NodeType t
Type of node.
Definition: bool-expr.cpp:234
ExecStatus subsumed(Space &home, Propagator &p, int c, TaskArray< Task > &t)
Check for subsumption (all tasks must be assigned)
Definition: subsumption.hpp:42
Cap c
Resource capacity.
Definition: cumulative.hh:710
Scheduling propagator for unary resource with mandatory tasks
Definition: unary.hh:795
ExecStatus overload(Space &home, int c, TaskArray< ManTask > &t)
Check mandatory tasks t for overload.
Definition: overload.hpp:45
Propagator for tasks
Definition: task.hh:428
virtual Actor * copy(Space &home)
Perform copying during cloning.
Definition: man-prop.hpp:83
#define forceinline
Definition: config.hpp:182
Computation spaces.
Definition: core.hpp:1668
virtual size_t dispose(Space &home)
Delete propagator and return its size.
Definition: man-prop.hpp:89
Traits class for mapping tasks to task views.
Definition: task.hh:161
Base-class for both propagators and branchers.
Definition: core.hpp:620
#define GECODE_ES_CHECK(es)
Check whether execution status es is failed or subsumed, and forward failure or subsumption.
Definition: macros.hpp:95
Gecode::FloatVal c(-8, 8)
int p
Number of positive literals for node type.
Definition: bool-expr.cpp:236
Gecode::IntArgs i(4, 1, 2, 3, 4)
Execution has resulted in failure.
Definition: core.hpp:466
const Gecode::PropCond PC_INT_BND
Propagate when minimum or maximum of a view changes.
Definition: var-type.hpp:91
ModEventDelta med
A set of modification events (used during propagation)
Definition: core.hpp:1027
#define GECODE_ME_CHECK(me)
Check whether modification event me is failed, and forward failure.
Definition: macros.hpp:56
ManProp(Home home, Cap c, TaskArray< ManTask > &t)
Constructor for creation.
Definition: man-prop.hpp:44
const Gecode::ModEvent ME_INT_DOM
Domain operation has changed the domain.
Definition: var-type.hpp:72
ExecStatus timetabling(Space &home, Propagator &p, Cap c, TaskArray< Task > &t)
Perform time-tabling propagation.
ExecStatus
Definition: core.hpp:464
static ModEvent me(const ModEventDelta &med)
Return modification event for view type in med.
Definition: view.hpp:514
Execution is okay.
Definition: core.hpp:468
Propagation has not computed fixpoint.
Definition: core.hpp:467
Scheduling propagator for cumulative resource with mandatory tasks.
Definition: cumulative.hh:706
virtual ExecStatus propagate(Space &home, const ModEventDelta &med)
Perform propagation.
Definition: man-prop.hpp:97
Gecode toplevel namespace
TaskArray< ManTask > t
Tasks.
Definition: task.hh:431
static ExecStatus post(Home home, Cap c, TaskArray< ManTask > &t)
Post propagator that schedules tasks on cumulative resource.
Definition: man-prop.hpp:58
int ModEventDelta
Modification event deltas.
Definition: core.hpp:91
Home class for posting propagators
Definition: core.hpp:846
ExecStatus edgefinding(Space &home, int c, TaskViewArray< TaskView > &t)
int size(void) const
Return size of array (number of elements)
Definition: array.hpp:67