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propagate.cpp
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7  * Christian Schulte, 2019
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33 
34 #include <gecode/int/order.hh>
35 
36 namespace Gecode { namespace Int { namespace Order {
37 
38  Actor*
40  return new (home) OrderProp(home,*this);
41  }
42 
43  PropCost
44  OrderProp::cost(const Space&, const ModEventDelta&) const {
46  }
47 
48  void
50  s0.reschedule(home,*this,PC_INT_BND);
51  s1.reschedule(home,*this,PC_INT_BND);
52  b.reschedule(home,*this,PC_INT_VAL);
53  }
54 
57  if (s0.max() + p0 <= s1.min()) {
58  GECODE_ME_CHECK(b.zero(home));
59  return home.ES_SUBSUMED(*this);
60  } else if (s1.max() + p1 <= s0.min()) {
61  GECODE_ME_CHECK(b.one(home));
62  return home.ES_SUBSUMED(*this);
63  } else if ((s1.min() + p1 > s0.max()) || b.zero()) {
64  GECODE_ME_CHECK(b.zero(home));
66  (home(*this),OffsetView(s0,p0),s1)));
67  } else if ((s0.min() + p0 > s1.max()) || b.one()) {
68  GECODE_ME_CHECK(b.one(home));
70  (home(*this),OffsetView(s1,p1),s0)));
71  }
72  return ES_FIX;
73  }
74 
75  size_t
77  s0.cancel(home,*this,PC_INT_BND);
78  s1.cancel(home,*this,PC_INT_BND);
79  b.cancel(home,*this,PC_INT_VAL);
80  (void) Propagator::dispose(home);
81  return sizeof(*this);
82  }
83 
84 }}}
85 
86 // STATISTICS: int-prop
bool zero(void) const
Test whether view is assigned to be zero.
Definition: bool.hpp:220
Less or equal propagator.
Definition: rel.hh:493
ExecStatus ES_SUBSUMED(Propagator &p)
Definition: core.hpp:3563
virtual void reschedule(Space &home)
Schedule function.
Definition: propagate.cpp:49
int min(void) const
Return minimum of domain.
Definition: int.hpp:58
static PropCost binary(PropCost::Mod m)
Two variables for modifier pcm.
Definition: core.hpp:4809
virtual PropCost cost(const Space &home, const ModEventDelta &med) const
Cost function (defined as low binary)
Definition: propagate.cpp:44
bool one(void) const
Test whether view is assigned to be one.
Definition: bool.hpp:224
Cheap.
Definition: core.hpp:513
void cancel(Space &home, Propagator &p, PropCond pc)
Cancel subscription of propagator p with propagation condition pc to view.
Definition: view.hpp:527
Computation spaces.
Definition: core.hpp:1742
Base-class for both propagators and branchers.
Definition: core.hpp:628
int p0
Processing times.
Definition: order.hh:60
Gecode toplevel namespace
int max(void) const
Return maximum of domain.
Definition: int.hpp:62
IntView s0
View for start times.
Definition: order.hh:56
int p1
Definition: order.hh:60
IntView s1
Definition: order.hh:56
virtual Actor * copy(Space &home)
Copy propagator during cloning.
Definition: propagate.cpp:39
Offset integer view.
Definition: view.hpp:443
const Gecode::PropCond PC_INT_BND
Propagate when minimum or maximum of a view changes.
Definition: var-type.hpp:91
void reschedule(Space &home, Propagator &p, PropCond pc)
Re-schedule propagator p with propagation condition pc.
Definition: view.hpp:532
Propagation cost.
Definition: core.hpp:486
BoolView b
Boolean view for order.
Definition: order.hh:58
const Gecode::PropCond PC_INT_VAL
Propagate when a view becomes assigned (single value)
Definition: var-type.hpp:82
Propagation has computed fixpoint.
Definition: core.hpp:477
virtual size_t dispose(Space &home)
Delete propagator and return its size.
Definition: propagate.cpp:76
#define GECODE_ME_CHECK(me)
Check whether modification event me is failed, and forward failure.
Definition: macros.hpp:52
virtual ExecStatus propagate(Space &home, const ModEventDelta &med)
Perform propagation.
Definition: propagate.cpp:56
virtual size_t dispose(Space &home)
Delete actor and return its size.
Definition: core.hpp:3252
int ModEventDelta
Modification event deltas.
Definition: core.hpp:89
#define GECODE_REWRITE(prop, post)
Rewrite propagator by executing post function.
Definition: macros.hpp:116
OrderProp(Space &home, OrderProp &p)
Constructor for cloning.
Definition: propagate.hpp:67
ExecStatus
Definition: core.hpp:472