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propagate.hpp
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1/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
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3 * Main authors:
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7 * Christian Schulte, 2019
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33
34#include <gecode/int/rel.hh>
35
36namespace Gecode { namespace Int { namespace Order {
37
39 OrderProp::OrderProp(Home home, IntView _s0, int _p0, IntView _s1, int _p1,
40 BoolView _b)
41 : Propagator(home), s0(_s0), s1(_s1), b(_b), p0(_p0), p1(_p1) {
42 s0.subscribe(home,*this,PC_INT_BND);
43 s1.subscribe(home,*this,PC_INT_BND);
44 b.subscribe(home,*this,PC_INT_VAL);
45 }
46
48 OrderProp::post(Home home, IntView s0, int p0, IntView s1, int p1,
49 BoolView b) {
50 if (s0.max() + p0 <= s1.min()) {
51 GECODE_ME_CHECK(b.zero(home));
52 } else if (s1.max() + p1 <= s0.min()) {
53 GECODE_ME_CHECK(b.one(home));
54 } else if ((s1.min() + p1 > s0.max()) || b.zero()) {
55 GECODE_ME_CHECK(b.zero(home));
57 } else if ((s0.min() + p0 > s1.max()) || b.one()) {
58 GECODE_ME_CHECK(b.one(home));
60 } else {
61 (void) new (home) OrderProp(home,s0,p0,s1,p1,b);
62 }
63 return ES_OK;
64 }
65
68 : Propagator(home,p), p0(p.p0), p1(p.p1) {
69 s0.update(home,p.s0);
70 s1.update(home,p.s1);
71 b.update(home,p.b);
72 }
73
74}}}
75
76// STATISTICS: int-prop
struct Gecode::@603::NNF::@65::@66 b
For binary nodes (and, or, eqv)
int p
Number of positive literals for node type.
Home class for posting propagators
Definition core.hpp:856
Boolean view for Boolean variables.
Definition view.hpp:1380
bool zero(void) const
Test whether view is assigned to be zero.
Definition bool.hpp:220
bool one(void) const
Test whether view is assigned to be one.
Definition bool.hpp:224
Integer view for integer variables.
Definition view.hpp:129
int min(void) const
Return minimum of domain.
Definition int.hpp:58
int max(void) const
Return maximum of domain.
Definition int.hpp:62
Offset integer view.
Definition view.hpp:443
Scheduling propagator for ordering two tasks
Definition order.hh:53
static ExecStatus post(Home home, IntView s0, int p0, IntView s1, int p1, BoolView b)
Post order propagator.
Definition propagate.hpp:48
BoolView b
Boolean view for order.
Definition order.hh:58
int p0
Processing times.
Definition order.hh:60
OrderProp(Space &home, OrderProp &p)
Constructor for cloning.
Definition propagate.hpp:67
IntView s0
View for start times.
Definition order.hh:56
static ExecStatus post(Home home, V0 x0, V1 x1)
Post propagator .
Definition lq-le.hpp:50
Base-class for propagators.
Definition core.hpp:1064
Computation spaces.
Definition core.hpp:1742
void update(Space &home, VarImpView< Var > &y)
Update this view to be a clone of view y.
Definition view.hpp:567
void subscribe(Space &home, Propagator &p, PropCond pc, bool schedule=true)
Subscribe propagator p with propagation condition pc to view.
Definition view.hpp:521
#define GECODE_ME_CHECK(me)
Check whether modification event me is failed, and forward failure.
Definition macros.hpp:52
const Gecode::PropCond PC_INT_VAL
Propagate when a view becomes assigned (single value)
Definition var-type.hpp:82
const Gecode::PropCond PC_INT_BND
Propagate when minimum or maximum of a view changes.
Definition var-type.hpp:91
Gecode toplevel namespace
ExecStatus
Definition core.hpp:472
@ ES_OK
Execution is okay.
Definition core.hpp:476
#define forceinline
Definition config.hpp:187