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#ifndef GECODE_INT_CHANNEL_HH#define GECODE_INT_CHANNEL_HH
#include <gecode/int.hh>#include <gecode/int/distinct.hh>
/** * \namespace Gecode::Int::Channel * \brief %Channel propagators */
namespace Gecode { namespace Int { namespace Channel {
/// Processing stack typedef Support::StaticStack<int,Region> ProcessStack;
/** * \brief Base-class for channel propagators * */ template<class Info, class Offset, PropCond pc> class Base : public Propagator { protected: /// Number of views (actually twice as many for both x and y) int n; /// Total number of not assigned views (not known to be assigned) int n_na; /// Offset transformation for x variables Offset ox; /// Offset transformation for y variables Offset oy; /// View and information for both \a x and \a y Info* xy; /// Constructor for cloning \a p Base(Space& home, Base<Info,Offset,pc>& p); /// Constructor for posting Base(Home home, int n, Info* xy, Offset& ox, Offset& oy); public: /// Propagation cost (defined as low quadratic) virtual PropCost cost(const Space& home, const ModEventDelta& med) const; /// Schedule function virtual void reschedule(Space& home); /// Delete propagator and return its size virtual size_t dispose(Space& home); };
/** * \brief Combine view with information for value propagation * */ template<class View> class ValInfo;
/** * \brief Naive channel propagator * * Only propagates if views become assigned. If \a shared is true, * the same views can be contained in both \a x and \a y. * * Requires \code #include <gecode/int/channel.hh> \endcode * \ingroup FuncIntProp */ template<class View, class Offset, bool shared> class Val : public Base<ValInfo<View>,Offset,PC_INT_VAL> { protected: using Base<ValInfo<View>,Offset,PC_INT_VAL>::n; using Base<ValInfo<View>,Offset,PC_INT_VAL>::n_na; using Base<ValInfo<View>,Offset,PC_INT_VAL>::xy; using Base<ValInfo<View>,Offset,PC_INT_VAL>::ox; using Base<ValInfo<View>,Offset,PC_INT_VAL>::oy; /// Constructor for cloning \a p Val(Space& home, Val& p); /// Constructor for posting Val(Home home, int n, ValInfo<View>* xy, Offset& ox, Offset& oy); public: /// Copy propagator during cloning virtual Actor* copy(Space& home); /// Perform propagation virtual ExecStatus propagate(Space& home, const ModEventDelta& med); /// Post propagator for channeling static ExecStatus post(Home home, int n, ValInfo<View>* xy, Offset& ox, Offset& oy); };
/** * \brief Combine view with information for domain propagation * */ template<class View, class Offset> class DomInfo;
/** * \brief Domain consistent channel propagator * * If \a shared is true, the same views can be contained in both * \a x and \a y. * * Requires \code #include <gecode/int/channel.hh> \endcode * \ingroup FuncIntProp */ template<class View, class Offset, bool shared> class Dom : public Base<DomInfo<View,Offset>,Offset,PC_INT_DOM> { protected: using Base<DomInfo<View,Offset>,Offset,PC_INT_DOM>::n; using Base<DomInfo<View,Offset>,Offset,PC_INT_DOM>::n_na; using Base<DomInfo<View,Offset>,Offset,PC_INT_DOM>::xy; using Base<DomInfo<View,Offset>,Offset,PC_INT_DOM>::ox; using Base<DomInfo<View,Offset>,Offset,PC_INT_DOM>::oy; /// Propagation controller for propagating distinct Distinct::DomCtrl<View> dc; /// Constructor for cloning \a p Dom(Space& home, Dom& p); /// Constructor for posting Dom(Home home, int n, DomInfo<View,Offset>* xy, Offset& ox, Offset& oy); public: /// Copy propagator during cloning virtual Actor* copy(Space& home); /** * \brief Cost function * * If in stage for naive value propagation, the cost is * low quadratic. Otherwise it is high quadratic. */ virtual PropCost cost(const Space& home, const ModEventDelta& med) const; /// Perform propagation virtual ExecStatus propagate(Space& home, const ModEventDelta& med); /// Post propagator for channeling on \a xy static ExecStatus post(Home home, int n, DomInfo<View,Offset>* xy, Offset& ox, Offset& oy); };
/** * \brief Link propagator for a single Boolean view * * Requires \code #include <gecode/int/channel.hh> \endcode * \ingroup FuncIntProp */ class LinkSingle : public MixBinaryPropagator<BoolView,PC_BOOL_VAL,IntView,PC_INT_VAL> { private: using MixBinaryPropagator<BoolView,PC_BOOL_VAL,IntView,PC_INT_VAL>::x0; using MixBinaryPropagator<BoolView,PC_BOOL_VAL,IntView,PC_INT_VAL>::x1;
/// Constructor for cloning \a p LinkSingle(Space& home, LinkSingle& p); /// Constructor for posting LinkSingle(Home home, BoolView x0, IntView x1); public: /// Copy propagator during cloning virtual Actor* copy(Space& home); /// Cost function (defined as low unary) virtual PropCost cost(const Space& home, const ModEventDelta& med) const; /// Perform propagation virtual ExecStatus propagate(Space& home, const ModEventDelta& med); /// Post propagator for \f$ x_0 = x_1\f$ static ExecStatus post(Home home, BoolView x0, IntView x1); };
/** * \brief Link propagator for multiple Boolean views * * Requires \code #include <gecode/int/channel.hh> \endcode * \ingroup FuncIntProp */ class LinkMulti : public MixNaryOnePropagator<BoolView,PC_BOOL_NONE,IntView,PC_INT_DOM> { private: using MixNaryOnePropagator<BoolView,PC_BOOL_NONE,IntView,PC_INT_DOM>::x; using MixNaryOnePropagator<BoolView,PC_BOOL_NONE,IntView,PC_INT_DOM>::y; /// The advisor council Council<Advisor> c; /// Value for propagator being idle static const int S_NONE = 0; /// Value for propagator having detected a one static const int S_ONE = 1; /// Value for propagator currently running static const int S_RUN = 2; /// Propagator status int status; /// Offset value int o; /// Constructor for cloning \a p LinkMulti(Space& home, LinkMulti& p); /// Constructor for posting LinkMulti(Home home, ViewArray<BoolView>& x, IntView y, int o0); public: /// Copy propagator during cloning GECODE_INT_EXPORT virtual Actor* copy(Space& home); /// Cost function (low unary if \a y is assigned, low linear otherwise) GECODE_INT_EXPORT virtual PropCost cost(const Space& home, const ModEventDelta& med) const; /// Schedule function GECODE_INT_EXPORT virtual void reschedule(Space& home); /// Give advice to propagator GECODE_INT_EXPORT virtual ExecStatus advise(Space& home, Advisor& a, const Delta& d); /// Perform propagation GECODE_INT_EXPORT virtual ExecStatus propagate(Space& home, const ModEventDelta& med); /// Post propagator for \f$ x_i = 1\leftrightarrow y=i+o\f$ static ExecStatus post(Home home, ViewArray<BoolView>& x, IntView y, int o); /// Delete propagator and return its size GECODE_INT_EXPORT virtual size_t dispose(Space& home); };
}}}
#include <gecode/int/channel/base.hpp>#include <gecode/int/channel/val.hpp>#include <gecode/int/channel/dom.hpp>
#include <gecode/int/channel/link-single.hpp>#include <gecode/int/channel/link-multi.hpp>
#endif
// STATISTICS: int-prop