base.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, 2011
 *
 *  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
 *  "Software"), to deal in the Software without restriction, including
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 *  permit persons to whom the Software is furnished to do so, subject to
 *  the following conditions:
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 *  included in all copies or substantial portions of the Software.
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namespace Gecode { namespace Int { namespace NoOverlap {

  template<class Box>
  forceinline
  Base<Box>::Base(Home home, Box* b0, int n0)
    : Propagator(home), b(b0), n(n0) {
    for (int i=0; i<n; i++)
      b[i].subscribe(home,*this);
  }

  template<class Box>
  forceinline int
  Base<Box>::partition(Box* b, int i, int n) {
    int j = n-1;
    while (true) {
      while (!b[j].mandatory() && (--j >= 0)) {}
      while (b[i].mandatory() && (++i < n)) {}
      if (j <= i) break;
      std::swap(b[i],b[j]);
    }
    return i;
  }

  template<class Box>
  forceinline size_t
  Base<Box>::dispose(Space& home) {
    for (int i=0; i<n; i++)
      b[i].cancel(home,*this);
    (void) Propagator::dispose(home);
    return sizeof(*this);
  }


  template<class Box>
  forceinline
  Base<Box>::Base(Space& home, Base<Box>& p, int m)
    : Propagator(home,p), b(home.alloc<Box>(m)), n(p.n) {
    for (int i=0; i<m; i++)
      b[i].update(home,p.b[i]);
  }

  template<class Box>
  PropCost
  Base<Box>::cost(const Space&, const ModEventDelta&) const {
    return PropCost::quadratic(PropCost::HI,Box::dim()*n);
  }

  template<class Box>
  void
  Base<Box>::reschedule(Space& home) {
    for (int i=0; i<n; i++)
      b[i].reschedule(home,*this);
  }

}}}

// STATISTICS: int-prop