opt-prop.hpp
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/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
* Main authors:
* Christian Schulte <schulte@gecode.org>
*
* Copyright:
* Christian Schulte, 2009
*
* This file is part of Gecode, the generic constraint
* development environment:
* http://www.gecode.org
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#include <algorithm>
namespace Gecode { namespace Int { namespace Unary {
template<class OptTask, class PL>
forceinline
OptProp<OptTask,PL>::OptProp(Home home, TaskArray<OptTask>& t)
: TaskProp<OptTask,PL>(home,t) {}
template<class OptTask, class PL>
forceinline
OptProp<OptTask,PL>::OptProp(Space& home, OptProp<OptTask,PL>& p)
: TaskProp<OptTask,PL>(home,p) {}
template<class OptTask, class PL>
ExecStatus
OptProp<OptTask,PL>::post(Home home, TaskArray<OptTask>& t) {
int m=0, o=0;
for (int i=0; i<t.size(); i++) {
if (t[i].mandatory())
m++;
else if (t[i].optional())
o++;
}
if (m == t.size()) {
TaskArray<typename TaskTraits<OptTask>::ManTask> mt(home,m);
for (int i=0; i<m; i++)
mt[i].init(t[i]);
return ManProp<typename TaskTraits<OptTask>::ManTask,PL>::post(home,mt);
}
if (o+m > 1)
(void) new (home) OptProp<OptTask,PL>(home,t);
return ES_OK;
}
template<class OptTask, class PL>
Actor*
OptProp<OptTask,PL>::copy(Space& home) {
return new (home) OptProp<OptTask,PL>(home,*this);
}
template<class OptTask, class PL>
ExecStatus
OptProp<OptTask,PL>::propagate(Space& home, const ModEventDelta& med) {
// Did one of the Boolean views change?
if (BoolView::me(med) == ME_BOOL_VAL)
GECODE_ES_CHECK((purge<OptTask,PL>(home,*this,t)));
GECODE_ES_CHECK((overload<OptTask,PL>(home,*this,t)));
if (PL::basic)
GECODE_ES_CHECK(timetabling(home,*this,t));
if (PL::advanced) {
GECODE_ES_CHECK((detectable<OptTask,PL>(home,*this,t)));
GECODE_ES_CHECK((notfirstnotlast<OptTask,PL>(home,*this,t)));
// Partition into mandatory and optional activities
int n = t.size();
int i=0, j=n-1;
while (true) {
while ((i < n) && t[i].mandatory()) i++;
while ((j >= 0) && !t[j].mandatory()) j--;
if (i >= j) break;
std::swap(t[i],t[j]);
}
if (i > 1) {
// Truncate array to only contain mandatory tasks
t.size(i);
GECODE_ES_CHECK(edgefinding(home,t));
// Restore to also include optional tasks
t.size(n);
}
}
if (!PL::basic)
GECODE_ES_CHECK(subsumed(home,*this,t));
return ES_NOFIX;
}
}}}
// STATISTICS: int-prop
Gecode::ActorLink::init
void init(void)
Initialize links (self-linked).
Definition core.hpp:3154
Gecode::Actor
Base-class for both propagators and branchers.
Definition core.hpp:628
Gecode::Home
Home class for posting propagators
Definition core.hpp:856
Gecode::Int::TaskArray
Task array.
Definition task.hh:165
Gecode::Int::TaskProp< OptTask, PL >::t
TaskArray< OptTask > t
Definition task.hh:427
Gecode::Int::TaskProp< OptTask, PL >::TaskProp
TaskProp(Home home, TaskArray< OptTask > &t)
Definition prop.hpp:38
Gecode::Int::Unary::ManProp
Scheduling propagator for unary resource with mandatory tasks
Definition unary.hh:791
Gecode::Int::Unary::OptProp::propagate
virtual ExecStatus propagate(Space &home, const ModEventDelta &med)
Perform propagation.
Definition opt-prop.hpp:77
Gecode::Int::Unary::OptProp::post
static ExecStatus post(Home home, TaskArray< OptTask > &t)
Post propagator that schedules tasks on unary resource.
Definition opt-prop.hpp:50
Gecode::Int::Unary::OptProp::OptProp
OptProp(Home home, TaskArray< OptTask > &t)
Constructor for creation.
Definition opt-prop.hpp:40
Gecode::Int::Unary::OptProp::copy
virtual Actor * copy(Space &home)
Perform copying during cloning.
Definition opt-prop.hpp:71
Gecode::Propagator::Space
friend class Space
Definition core.hpp:1066
Gecode::Propagator::med
ModEventDelta med
A set of modification events (used during propagation).
Definition core.hpp:1075
Gecode::VarImpView< BoolVar >::me
static ModEvent me(const ModEventDelta &med)
Definition view.hpp:552
Gecode::ModEventDelta
int ModEventDelta
Modification event deltas.
Definition core.hpp:89
GECODE_ES_CHECK
#define GECODE_ES_CHECK(es)
Check whether execution status es is failed or subsumed, and forward failure or subsumption.
Definition macros.hpp:91
Gecode::Int::Unary
Int for unary resources
Gecode::Int::Unary::timetabling
ExecStatus timetabling(Space &home, Propagator &p, TaskArray< Task > &t)
Perform time-tabling propagation.
Definition time-tabling.hpp:40
Gecode::Int::Unary::overload
ExecStatus overload(TaskArray< ManTask > &t)
Check mandatory tasks t for overload.
Definition overload.hpp:39
Gecode::Int::Unary::subsumed
ExecStatus subsumed(Space &home, Propagator &p, TaskArray< Task > &t)
Check tasks t for subsumption.
Definition subsumption.hpp:38
Gecode::Int::Unary::detectable
ExecStatus detectable(Space &home, TaskArray< ManTask > &t)
Propagate detectable precedences.
Definition detectable.hpp:62
Gecode::Int::Unary::notfirstnotlast
ExecStatus notfirstnotlast(Space &home, TaskArray< ManTask > &t)
Propagate not-first and not-last.
Definition not-first-not-last.hpp:72
Gecode::Int::Unary::edgefinding
ExecStatus edgefinding(Space &home, TaskArray< Task > &t)
Propagate by edge-finding.
Definition edge-finding.hpp:65
Gecode::Int
Finite domain integers.
Gecode::Int::purge
ExecStatus purge(Space &home, Propagator &p, TaskArray< OptTask > &t)
Purge optional tasks that are excluded and possibly rewrite propagator.
Definition purge.hpp:38
Gecode::Int::ME_BOOL_VAL
const Gecode::ModEvent ME_BOOL_VAL
Domain operation has resulted in a value (assigned variable).
Definition var-type.hpp:116
Gecode
Gecode toplevel namespace
Gecode::post
TFE post(PropagatorGroup g)
Only post functions (but not propagators) from g are considered.
Definition filter.cpp:138
Gecode::ExecStatus
ExecStatus
Definition core.hpp:472
Gecode::ES_OK
@ ES_OK
Execution is okay.
Definition core.hpp:476
Gecode::ES_NOFIX
@ ES_NOFIX
Propagation has not computed fixpoint.
Definition core.hpp:475
forceinline
#define forceinline
Definition config.hpp:187