Generated on Sun Aug 9 2020 05:34:08 for Gecode by doxygen 1.8.18
bab.cpp
Go to the documentation of this file.
1 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
2 /*
3  * Main authors:
4  * Christian Schulte <schulte@gecode.org>
5  *
6  * Copyright:
7  * Christian Schulte, 2009
8  *
9  * This file is part of Gecode, the generic constraint
10  * development environment:
11  * http://www.gecode.org
12  *
13  * Permission is hereby granted, free of charge, to any person obtaining
14  * a copy of this software and associated documentation files (the
15  * "Software"), to deal in the Software without restriction, including
16  * without limitation the rights to use, copy, modify, merge, publish,
17  * distribute, sublicense, and/or sell copies of the Software, and to
18  * permit persons to whom the Software is furnished to do so, subject to
19  * the following conditions:
20  *
21  * The above copyright notice and this permission notice shall be
22  * included in all copies or substantial portions of the Software.
23  *
24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
28  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
29  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
30  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
31  *
32  */
33 
34 #include <gecode/search.hh>
35 #include <gecode/search/support.hh>
36 
37 #include <gecode/search/seq/bab.hh>
38 #ifdef GECODE_HAS_THREADS
39 #include <gecode/search/par/bab.hh>
40 #endif
41 
42 namespace Gecode { namespace Search {
43 
44  Engine*
45  babengine(Space* s, const Options& o) {
46 #ifdef GECODE_HAS_THREADS
47  Options to = o.expand();
48  if (to.threads == 1.0) {
49  if (to.tracer)
51  else
53  } else {
54  if (to.tracer)
55  return new Par::BAB<EdgeTraceRecorder>(s,to);
56  else
57  return new Par::BAB<NoTraceRecorder>(s,to);
58  }
59 #else
60  if (to.tracer)
62  else
64 #endif
65  }
66 
67 }}
68 
69 // STATISTICS: search-other
Search engine options
Definition: search.hh:746
Computation spaces.
Definition: core.hpp:1742
Gecode toplevel namespace
Virtualize a worker to an engine.
Definition: support.hh:47
Engine * babengine(Space *s, const Options &o)
Create branch and bound engine.
Definition: bab.cpp:45
Parallel branch-and-bound engine
Definition: bab.hh:43
Options expand(void) const
Expand with real number of threads.
Definition: options.cpp:43
double threads
Number of threads to use.
Definition: search.hh:751
SearchTracer * tracer
Tracer object for tracing search.
Definition: search.hh:769