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gecode
int
cumulative
subsumption.hpp
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/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
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/*
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* Main authors:
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* Christian Schulte <schulte@gecode.org>
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*
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* Copyright:
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* Christian Schulte, 2015
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*
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* This file is part of Gecode, the generic constraint
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* development environment:
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* http://www.gecode.org
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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namespace
Gecode
{
namespace
Int {
namespace
Cumulative {
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template
<
class
Task>
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forceinline
ExecStatus
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subsumed
(
Space
& home,
Propagator
&
p
,
int
c
,
TaskArray<Task>
&
t
) {
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Region
r
;
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if
(
Event
* e =
Event::events
(
r
,
t
)) {
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// Process events, use ccur as the capacity that is still free
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do
{
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// Current time
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int
time = e->time();
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// Process events for completion of required part
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for
( ; (e->type() ==
Event::LRT
) && (e->time() == time); e++)
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c
+=
t
[e->idx()].c();
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// Process events for zero-length task
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for
( ; (e->type() ==
Event::ZRO
) && (e->time() == time); e++)
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if
(
c
<
t
[e->idx()].c())
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return
ES_FAILED
;
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// Process events for start of required part
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for
( ; (e->type() ==
Event::ERT
) && (e->time() == time); e++) {
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c
-=
t
[e->idx()].c();
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if
(
c
< 0)
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return
ES_FAILED
;
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}
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}
while
(e->type() !=
Event::END
);
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}
else
{
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return
ES_OK
;
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}
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return
home.
ES_SUBSUMED
(
p
);
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}
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}}}
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// STATISTICS: int-prop
Gecode::Int::Event::ERT
@ ERT
Earliest required time of task.
Definition:
task.hh:498
Gecode::Space::ES_SUBSUMED
ExecStatus ES_SUBSUMED(Propagator &p)
Definition:
core.hpp:3563
Gecode::Int::Event
Time-tabling event for task.
Definition:
task.hh:490
t
NodeType t
Type of node.
Definition:
bool-expr.cpp:230
Gecode::Space
Computation spaces.
Definition:
core.hpp:1742
Gecode::Int::Cumulative::subsumed
ExecStatus subsumed(Space &home, Propagator &p, int c, TaskArray< Task > &t)
Check for subsumption (all tasks must be assigned)
Definition:
subsumption.hpp:38
Gecode
Gecode toplevel namespace
Gecode::Propagator
Base-class for propagators.
Definition:
core.hpp:1064
Gecode::Region
Handle to region.
Definition:
region.hpp:55
Gecode::r
Post propagator for SetVar SetOpType SetVar SetRelType r
Definition:
set.hh:767
Gecode::Int::Event::END
@ END
End marker.
Definition:
task.hh:499
Gecode::Int::Event::events
static Event * events(Region &r, const TaskArray< Task > &t, bool &assigned)
Allocate from r and initialize event array with tasks t.
Definition:
event.hpp:83
Gecode::Int::TaskArray
Task array.
Definition:
task.hh:165
forceinline
#define forceinline
Definition:
config.hpp:185
Test::Float::Arithmetic::c
Gecode::FloatVal c(-8, 8)
Gecode::Int::Event::ZRO
@ ZRO
Zero-length task start time.
Definition:
task.hh:497
Gecode::ES_FAILED
@ ES_FAILED
Execution has resulted in failure.
Definition:
core.hpp:474
Gecode::ES_OK
@ ES_OK
Execution is okay.
Definition:
core.hpp:476
p
int p
Number of positive literals for node type.
Definition:
bool-expr.cpp:232
Gecode::Int::Event::LRT
@ LRT
Latest required time of task.
Definition:
task.hh:494
Gecode::ExecStatus
ExecStatus
Definition:
core.hpp:472