man-prop.hpp
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/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
* Main authors:
* Christian Schulte <schulte@gecode.org>
* Guido Tack <tack@gecode.org>
*
* Copyright:
* Christian Schulte, 2009
* Guido Tack, 2010
*
* This file is part of Gecode, the generic constraint
* development environment:
* http://www.gecode.org
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
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* permit persons to whom the Software is furnished to do so, subject to
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*
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namespace Gecode { namespace Int { namespace Cumulative {
template<class ManTask, class Cap, class PL>
forceinline
ManProp<ManTask,Cap,PL>::ManProp(Home home, Cap c0, TaskArray<ManTask>& t)
: TaskProp<ManTask,PL>(home,t), c(c0) {
c.subscribe(home,*this,PC_INT_BND);
}
template<class ManTask, class Cap, class PL>
forceinline
ManProp<ManTask,Cap,PL>::ManProp(Space& home, ManProp<ManTask,Cap,PL>& p)
: TaskProp<ManTask,PL>(home,p) {
c.update(home,p.c);
}
template<class ManTask, class Cap, class PL>
ExecStatus
ManProp<ManTask,Cap,PL>::post(Home home, Cap c, TaskArray<ManTask>& t) {
// Capacity must be nonnegative
GECODE_ME_CHECK(c.gq(home, 0));
// Check that tasks do not overload resource
for (int i=0; i<t.size(); i++)
if (t[i].c() > c.max())
return ES_FAILED;
if (t.size() == 1)
GECODE_ME_CHECK(c.gq(home, t[0].c()));
if (t.size() > 1) {
if (c.assigned() && c.val()==1) {
TaskArray<typename TaskTraits<ManTask>::UnaryTask> mt(home,t.size());
for (int i=0; i<t.size(); i++)
mt[i]=t[i];
return Unary::ManProp<typename TaskTraits<ManTask>::UnaryTask,PL>
::post(home,mt);
} else {
(void) new (home) ManProp<ManTask,Cap,PL>(home,c,t);
}
}
return ES_OK;
}
template<class ManTask, class Cap, class PL>
Actor*
ManProp<ManTask,Cap,PL>::copy(Space& home) {
return new (home) ManProp<ManTask,Cap,PL>(home,*this);
}
template<class ManTask, class Cap, class PL>
forceinline size_t
ManProp<ManTask,Cap,PL>::dispose(Space& home) {
(void) TaskProp<ManTask,PL>::dispose(home);
c.cancel(home,*this,PC_INT_BND);
return sizeof(*this);
}
template<class ManTask, class Cap, class PL>
ExecStatus
ManProp<ManTask,Cap,PL>::propagate(Space& home, const ModEventDelta& med) {
// Only bounds changes?
if (IntView::me(med) != ME_INT_DOM)
GECODE_ES_CHECK(overload(home,c.max(),t));
if (PL::advanced)
GECODE_ES_CHECK(edgefinding(home,c.max(),t));
if (PL::basic)
GECODE_ES_CHECK(timetabling(home,*this,c,t));
if (Cap::varderived() && c.assigned() && (c.val() == 1)) {
// Check that tasks do not overload resource
for (int i=0; i<t.size(); i++)
if (t[i].c() > 1)
return ES_FAILED;
// Rewrite to unary resource constraint
TaskArray<typename TaskTraits<ManTask>::UnaryTask> ut(home,t.size());
for (int i=0; i<t.size(); i++)
ut[i]=t[i];
GECODE_REWRITE(*this,
(Unary::ManProp<typename TaskTraits<ManTask>::UnaryTask,PL>
::post(home(*this),ut)));
}
if (!PL::basic && c.assigned())
GECODE_ES_CHECK(subsumed(home,*this,c.val(),t));
return ES_NOFIX;
}
}}}
// STATISTICS: int-prop
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::Cumulative::ManProp::copy
virtual Actor * copy(Space &home)
Perform copying during cloning.
Definition man-prop.hpp:79
Gecode::Int::Cumulative::ManProp::propagate
virtual ExecStatus propagate(Space &home, const ModEventDelta &med)
Perform propagation.
Definition man-prop.hpp:93
Gecode::Int::Cumulative::ManProp::c
Cap c
Resource capacity.
Definition cumulative.hh:706
Gecode::Int::Cumulative::ManProp::dispose
virtual size_t dispose(Space &home)
Delete propagator and return its size.
Definition man-prop.hpp:85
Gecode::Int::Cumulative::ManProp::post
static ExecStatus post(Home home, Cap c, TaskArray< ManTask > &t)
Post propagator that schedules tasks on cumulative resource.
Definition man-prop.hpp:54
Gecode::Int::Cumulative::ManProp::ManProp
ManProp(Home home, Cap c, TaskArray< ManTask > &t)
Constructor for creation.
Definition man-prop.hpp:40
Gecode::Int::TaskArray
Task array.
Definition task.hh:165
Gecode::Int::TaskProp< ManTask, PL >::t
TaskArray< ManTask > t
Definition task.hh:427
Gecode::Int::TaskProp::dispose
virtual size_t dispose(Space &home)
Delete propagator and return its size.
Definition prop.hpp:64
Gecode::Int::TaskProp< ManTask, PL >::TaskProp
TaskProp(Home home, TaskArray< ManTask > &t)
Definition prop.hpp:38
Gecode::Int::TaskTraits
Traits class for mapping tasks to task views.
Definition task.hh:157
Gecode::Int::Unary::ManProp
Scheduling propagator for unary resource with mandatory tasks
Definition unary.hh:791
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< IntVar >::me
static ModEvent me(const ModEventDelta &med)
Definition view.hpp:552
Gecode::ModEventDelta
int ModEventDelta
Modification event deltas.
Definition core.hpp:89
GECODE_ME_CHECK
#define GECODE_ME_CHECK(me)
Check whether modification event me is failed, and forward failure.
Definition macros.hpp:52
GECODE_REWRITE
#define GECODE_REWRITE(prop, post)
Rewrite propagator by executing post function.
Definition macros.hpp:116
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::Cumulative
Scheduling for cumulative resources
Definition cumulative.cpp:40
Gecode::Int::Cumulative::timetabling
ExecStatus timetabling(Space &home, Propagator &p, Cap c, TaskArray< Task > &t)
Perform time-tabling propagation.
Definition time-tabling.hpp:55
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::Int::Cumulative::edgefinding
ExecStatus edgefinding(Space &home, int c, TaskArray< Task > &t)
Propagate by edge-finding.
Definition edge-finding.hpp:178
Gecode::Int::Cumulative::overload
ExecStatus overload(Space &home, int c, TaskArray< ManTask > &t)
Check mandatory tasks t for overload.
Definition overload.hpp:41
Gecode::Int
Finite domain integers.
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::Int::ME_INT_DOM
const Gecode::ModEvent ME_INT_DOM
Domain operation has changed the domain.
Definition var-type.hpp:72
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_FAILED
@ ES_FAILED
Execution has resulted in failure.
Definition core.hpp:474
Gecode::ES_NOFIX
@ ES_NOFIX
Propagation has not computed fixpoint.
Definition core.hpp:475
forceinline
#define forceinline
Definition config.hpp:187