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action.cpp

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00001 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
00002 /*
00003  *  Main authors:
00004  *     Christian Schulte <schulte@gecode.org>
00005  *
00006  *  Copyright:
00007  *     Christian Schulte, 2012
00008  *
00009  *  This file is part of Gecode, the generic constraint
00010  *  development environment:
00011  *     http://www.gecode.org
00012  *
00013  *  Permission is hereby granted, free of charge, to any person obtaining
00014  *  a copy of this software and associated documentation files (the
00015  *  "Software"), to deal in the Software without restriction, including
00016  *  without limitation the rights to use, copy, modify, merge, publish,
00017  *  distribute, sublicense, and/or sell copies of the Software, and to
00018  *  permit persons to whom the Software is furnished to do so, subject to
00019  *  the following conditions:
00020  *
00021  *  The above copyright notice and this permission notice shall be
00022  *  included in all copies or substantial portions of the Software.
00023  *
00024  *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
00025  *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
00026  *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
00027  *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
00028  *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
00029  *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
00030  *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
00031  *
00032  */
00033 
00034 #include <gecode/kernel.hh>
00035 
00036 namespace Gecode {
00037 
00038   Support::Mutex Action::Storage::m;
00039 
00040   Action::Storage::~Storage(void) {
00041     heap.free<double>(a,n);
00042   }
00043 
00044   const Action Action::def;
00045 
00046   Action::Action(const Action& a)
00047     : SharedHandle(a) {}
00048 
00049   Action&
00050   Action::operator =(const Action& a) {
00051     (void) SharedHandle::operator =(a);
00052     return *this;
00053   }
00054 
00055   Action::~Action(void) {}
00056 
00057   void
00058   Action::decay(Space&, double d) {
00059     if ((d < 0.0) || (d > 1.0))
00060       throw IllegalDecay("Action");
00061     acquire();
00062     object().invd = 1.0 / d;
00063     release();
00064   }
00065 
00066   double
00067   Action::decay(const Space&) const {
00068     double d;
00069     const_cast<Action*>(this)->acquire();
00070     d = 1.0 / object().invd;
00071     const_cast<Action*>(this)->release();
00072     return d;
00073   }
00074 
00075 }
00076 
00077 // STATISTICS: kernel-branch