activity.cpp
Go to the documentation of this file.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 * Last modified: 00010 * $Date: 2014-05-27 14:57:59 +0200 (Tue, 27 May 2014) $ by $Author: schulte $ 00011 * $Revision: 14124 $ 00012 * 00013 * This file is part of Gecode, the generic constraint 00014 * development environment: 00015 * http://www.gecode.org 00016 * 00017 * Permission is hereby granted, free of charge, to any person obtaining 00018 * a copy of this software and associated documentation files (the 00019 * "Software"), to deal in the Software without restriction, including 00020 * without limitation the rights to use, copy, modify, merge, publish, 00021 * distribute, sublicense, and/or sell copies of the Software, and to 00022 * permit persons to whom the Software is furnished to do so, subject to 00023 * the following conditions: 00024 * 00025 * The above copyright notice and this permission notice shall be 00026 * included in all copies or substantial portions of the Software. 00027 * 00028 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 00029 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 00030 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 00031 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 00032 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 00033 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 00034 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 00035 * 00036 */ 00037 00038 #include <gecode/kernel.hh> 00039 00040 namespace Gecode { 00041 00042 const Activity Activity::def; 00043 00044 Activity::Activity(const Activity& a) 00045 : storage(a.storage) { 00046 if (storage != NULL) { 00047 acquire(); 00048 storage->use_cnt++; 00049 release(); 00050 } 00051 } 00052 00053 Activity& 00054 Activity::operator =(const Activity& a) { 00055 if (storage != a.storage) { 00056 if (storage != NULL) { 00057 bool done; 00058 acquire(); 00059 done = (--storage->use_cnt == 0); 00060 release(); 00061 if (done) 00062 delete storage; 00063 } 00064 storage = a.storage; 00065 if (storage != NULL) { 00066 acquire(); 00067 storage->use_cnt++; 00068 release(); 00069 } 00070 } 00071 return *this; 00072 } 00073 00074 Activity::~Activity(void) { 00075 if (storage == NULL) 00076 return; 00077 bool done; 00078 acquire(); 00079 done = (--storage->use_cnt == 0); 00080 release(); 00081 if (done) 00082 delete storage; 00083 } 00084 00085 void 00086 Activity::update(Space&, bool, Activity& a) { 00087 const_cast<Activity&>(a).acquire(); 00088 storage = a.storage; 00089 storage->use_cnt++; 00090 const_cast<Activity&>(a).release(); 00091 } 00092 00093 void 00094 Activity::set(Space&, double a) { 00095 acquire(); 00096 for (int i=storage->n; i--; ) 00097 storage->a[i] = a; 00098 release(); 00099 } 00100 00101 void 00102 Activity::decay(Space&, double d) { 00103 if ((d < 0.0) || (d > 1.0)) 00104 throw IllegalDecay("Activity"); 00105 acquire(); 00106 storage->d = d; 00107 release(); 00108 } 00109 00110 double 00111 Activity::decay(const Space&) const { 00112 double d; 00113 const_cast<Activity*>(this)->acquire(); 00114 d = storage->d; 00115 const_cast<Activity*>(this)->release(); 00116 return d; 00117 } 00118 00119 } 00120 00121 // STATISTICS: kernel-branch