Jip J. Dekker
981be2067e
git-subtree-dir: software/gecode_on_replay git-subtree-split: 8051d92b9c89e49cccfbd1c201371580d7703ab4
69 lines
2.0 KiB
C++
69 lines
2.0 KiB
C++
/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
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/*
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* Main authors:
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* Christian Schulte <schulte@gecode.org>
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*
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* Copyright:
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* Christian Schulte, 2008
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*
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* This file is part of Gecode, the generic constraint
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* development environment:
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* http://www.gecode.org
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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#include <gecode/search.hh>
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#include <cmath>
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namespace Gecode { namespace Search {
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const Options Options::def;
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Options
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Options::expand(void) const {
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#ifdef GECODE_HAS_THREADS
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double t = threads;
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if (t <= -1.0) {
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t = Support::Thread::npu() + t;
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} else if (t < 0.0) {
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t = (1.0 + t) * Support::Thread::npu();
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} else if (t == 0.0) {
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t = Support::Thread::npu();
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} else if (t < 1.0) {
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t = t * Support::Thread::npu();
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}
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t = floor(t+0.5);
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if (t < 1.0)
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t = 1.0;
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Options o(*this);
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o.threads = t;
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return o;
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#else
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return *this;
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#endif
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}
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}}
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// STATISTICS: search-other
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