main page
modules
namespaces
classes
files
Gecode home
Generated on Sun Aug 9 2020 05:34:08 for Gecode by
doxygen
1.8.18
gecode
int
order
propagate.cpp
Go to the documentation of this file.
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, 2019
8
*
9
* This file is part of Gecode, the generic constraint
10
* development environment:
11
* http://www.gecode.org
12
*
13
* Permission is hereby granted, free of charge, to any person obtaining
14
* a copy of this software and associated documentation files (the
15
* "Software"), to deal in the Software without restriction, including
16
* without limitation the rights to use, copy, modify, merge, publish,
17
* distribute, sublicense, and/or sell copies of the Software, and to
18
* permit persons to whom the Software is furnished to do so, subject to
19
* the following conditions:
20
*
21
* The above copyright notice and this permission notice shall be
22
* included in all copies or substantial portions of the Software.
23
*
24
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
28
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
29
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
30
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
31
*
32
*/
33
34
#include <
gecode/int/order.hh
>
35
36
namespace
Gecode
{
namespace
Int {
namespace
Order {
37
38
Actor
*
39
OrderProp::copy
(
Space
& home) {
40
return
new
(home)
OrderProp
(home,*
this
);
41
}
42
43
PropCost
44
OrderProp::cost
(
const
Space
&,
const
ModEventDelta
&)
const
{
45
return
PropCost::binary
(
PropCost::LO
);
46
}
47
48
void
49
OrderProp::reschedule
(
Space
& home) {
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
55
ExecStatus
56
OrderProp::propagate
(
Space
& home,
const
ModEventDelta
&) {
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));
65
GECODE_REWRITE
(*
this
,(
Rel::Lq<OffsetView,IntView>::post
66
(home(*
this
),
OffsetView
(
s0
,
p0
),
s1
)));
67
}
else
if
((
s0
.
min
() +
p0
>
s1
.
max
()) ||
b
.
one
()) {
68
GECODE_ME_CHECK
(
b
.
one
(home));
69
GECODE_REWRITE
(*
this
,(
Rel::Lq<OffsetView,IntView>::post
70
(home(*
this
),
OffsetView
(
s1
,
p1
),
s0
)));
71
}
72
return
ES_FIX
;
73
}
74
75
size_t
76
OrderProp::dispose
(
Space
& home) {
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
Gecode::Int::BoolView::zero
bool zero(void) const
Test whether view is assigned to be zero.
Definition:
bool.hpp:220
Gecode::Int::Rel::Lq
Less or equal propagator.
Definition:
rel.hh:493
Gecode::Space::ES_SUBSUMED
ExecStatus ES_SUBSUMED(Propagator &p)
Definition:
core.hpp:3563
Gecode::Int::Order::OrderProp::reschedule
virtual void reschedule(Space &home)
Schedule function.
Definition:
propagate.cpp:49
Gecode::Int::IntView::min
int min(void) const
Return minimum of domain.
Definition:
int.hpp:58
Gecode::PropCost::binary
static PropCost binary(PropCost::Mod m)
Two variables for modifier pcm.
Definition:
core.hpp:4809
Gecode::Int::Order::OrderProp::cost
virtual PropCost cost(const Space &home, const ModEventDelta &med) const
Cost function (defined as low binary)
Definition:
propagate.cpp:44
Gecode::Int::BoolView::one
bool one(void) const
Test whether view is assigned to be one.
Definition:
bool.hpp:224
Gecode::PropCost::LO
@ LO
Cheap.
Definition:
core.hpp:513
Gecode::VarImpView::cancel
void cancel(Space &home, Propagator &p, PropCond pc)
Cancel subscription of propagator p with propagation condition pc to view.
Definition:
view.hpp:527
Gecode::Space
Computation spaces.
Definition:
core.hpp:1742
Gecode::Actor
Base-class for both propagators and branchers.
Definition:
core.hpp:628
Gecode::Int::Order::OrderProp::p0
int p0
Processing times.
Definition:
order.hh:60
Gecode
Gecode toplevel namespace
Gecode::Int::IntView::max
int max(void) const
Return maximum of domain.
Definition:
int.hpp:62
Gecode::Int::Order::OrderProp::s0
IntView s0
View for start times.
Definition:
order.hh:56
Gecode::Int::Order::OrderProp::p1
int p1
Definition:
order.hh:60
Gecode::Int::Order::OrderProp::s1
IntView s1
Definition:
order.hh:56
Gecode::Int::Order::OrderProp::copy
virtual Actor * copy(Space &home)
Copy propagator during cloning.
Definition:
propagate.cpp:39
Gecode::Int::OffsetView
Offset integer view.
Definition:
view.hpp:443
Gecode::Int::PC_INT_BND
const Gecode::PropCond PC_INT_BND
Propagate when minimum or maximum of a view changes.
Definition:
var-type.hpp:91
Gecode::VarImpView::reschedule
void reschedule(Space &home, Propagator &p, PropCond pc)
Re-schedule propagator p with propagation condition pc.
Definition:
view.hpp:532
Gecode::PropCost
Propagation cost.
Definition:
core.hpp:486
Gecode::Int::Order::OrderProp::b
BoolView b
Boolean view for order.
Definition:
order.hh:58
Gecode::Int::PC_INT_VAL
const Gecode::PropCond PC_INT_VAL
Propagate when a view becomes assigned (single value)
Definition:
var-type.hpp:82
Gecode::ES_FIX
@ ES_FIX
Propagation has computed fixpoint.
Definition:
core.hpp:477
Gecode::Int::Order::OrderProp::dispose
virtual size_t dispose(Space &home)
Delete propagator and return its size.
Definition:
propagate.cpp:76
GECODE_ME_CHECK
#define GECODE_ME_CHECK(me)
Check whether modification event me is failed, and forward failure.
Definition:
macros.hpp:52
Gecode::Int::Order::OrderProp::propagate
virtual ExecStatus propagate(Space &home, const ModEventDelta &med)
Perform propagation.
Definition:
propagate.cpp:56
Gecode::Actor::dispose
virtual size_t dispose(Space &home)
Delete actor and return its size.
Definition:
core.hpp:3252
order.hh
Gecode::ModEventDelta
int ModEventDelta
Modification event deltas.
Definition:
core.hpp:89
GECODE_REWRITE
#define GECODE_REWRITE(prop, post)
Rewrite propagator by executing post function.
Definition:
macros.hpp:116
Gecode::Int::Order::OrderProp::OrderProp
OrderProp(Space &home, OrderProp &p)
Constructor for cloning.
Definition:
propagate.hpp:67
Gecode::ExecStatus
ExecStatus
Definition:
core.hpp:472