subsumption.hpp
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, 2015 00008 * 00009 * Last modified: 00010 * $Date: 2016-04-19 17:19:45 +0200 (Tue, 19 Apr 2016) $ by $Author: schulte $ 00011 * $Revision: 14967 $ 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 namespace Gecode { namespace Int { namespace Cumulative { 00039 00040 template<class Task> 00041 forceinline ExecStatus 00042 subsumed(Space& home, Propagator& p, int c, TaskArray<Task>& t) { 00043 Region r(home); 00044 00045 if (Event* e = Event::events(r,t)) { 00046 // Process events, use ccur as the capacity that is still free 00047 do { 00048 // Current time 00049 int time = e->time(); 00050 // Process events for completion of required part 00051 for ( ; (e->type() == Event::LRT) && (e->time() == time); e++) 00052 c += t[e->idx()].c(); 00053 // Process events for zero-length task 00054 for ( ; (e->type() == Event::ZRO) && (e->time() == time); e++) 00055 if (c < t[e->idx()].c()) 00056 return ES_FAILED; 00057 // Process events for start of required part 00058 for ( ; (e->type() == Event::ERT) && (e->time() == time); e++) { 00059 c -= t[e->idx()].c(); 00060 if (c < 0) 00061 return ES_FAILED; 00062 } 00063 } while (e->type() != Event::END); 00064 } else { 00065 return ES_OK; 00066 } 00067 00068 return home.ES_SUBSUMED(p); 00069 } 00070 00071 }}} 00072 00073 // STATISTICS: int-prop