bab.cpp
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/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
* Main authors:
* Christian Schulte <schulte@gecode.org>
*
* Copyright:
* Christian Schulte, 2009
*
* 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
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
#include <gecode/search.hh>
#include <gecode/search/support.hh>
#include <gecode/search/seq/bab.hh>
#ifdef GECODE_HAS_THREADS
#include <gecode/search/par/bab.hh>
#endif
namespace Gecode { namespace Search {
Engine*
babengine(Space* s, const Options& o) {
#ifdef GECODE_HAS_THREADS
Options to = o.expand();
if (to.threads == 1.0) {
if (to.tracer)
return new WorkerToEngine<Seq::BAB<TraceRecorder>>(s,to);
else
return new WorkerToEngine<Seq::BAB<NoTraceRecorder>>(s,to);
} else {
if (to.tracer)
return new Par::BAB<EdgeTraceRecorder>(s,to);
else
return new Par::BAB<NoTraceRecorder>(s,to);
}
#else
if (to.tracer)
return new WorkerToEngine<Seq::BAB<TraceRecorder>>(s,to);
else
return new WorkerToEngine<Seq::BAB<NoTraceRecorder>>(s,to);
#endif
}
}}
// STATISTICS: search-other
Gecode::Search::Engine
Search engine implementation interface
Definition search.hh:899
Gecode::Search::Options
Search engine options
Definition search.hh:746
Gecode::Search::Options::expand
Options expand(void) const
Expand with real number of threads.
Definition options.cpp:43
Gecode::Search::Options::tracer
SearchTracer * tracer
Tracer object for tracing search.
Definition search.hh:769
Gecode::Search::Options::threads
double threads
Number of threads to use.
Definition search.hh:751
Gecode::Search::Par::BAB
Parallel branch-and-bound engine
Definition bab.hh:43
Gecode::Search::WorkerToEngine
Virtualize a worker to an engine.
Definition support.hh:47
Gecode::Space
Computation spaces.
Definition core.hpp:1742
Gecode::Search
Search engines
Gecode::Search::babengine
Engine * babengine(Space *s, const Options &o)
Create branch and bound engine.
Definition bab.cpp:45
Gecode
Gecode toplevel namespace
bab.hh
support.hh
search.hh
bab.hh