worker.hh
Go to the documentation of this file.
/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
* Main authors:
* Christian Schulte <schulte@gecode.org>
*
* Copyright:
* Christian Schulte, 2004
*
* 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.
*
*/
#ifndef __GECODE_SEARCH_WORKER_HH__
#define __GECODE_SEARCH_WORKER_HH__
#include <gecode/search.hh>
namespace Gecode { namespace Search {
class Worker : public Statistics {
protected:
bool _stopped;
unsigned long int root_depth;
public:
Worker(void);
void start(void);
bool stop(const Options& o);
bool stopped(void) const;
void reset(unsigned long int d=0);
void stack_depth(unsigned long int d);
unsigned long int steal_depth(unsigned long int d) const;
};
forceinline
Worker::Worker(void)
: _stopped(false), root_depth(0) {}
forceinline void
Worker::start(void) {
_stopped = false;
}
forceinline bool
Worker::stop(const Options& o) {
if (o.stop == NULL)
return false;
_stopped |= o.stop->stop(*this,o);
return _stopped;
}
forceinline bool
Worker::stopped(void) const {
return _stopped;
}
forceinline void
Worker::reset(unsigned long int d) {
Statistics::reset();
root_depth = d;
if (depth < d)
depth = d;
}
forceinline void
Worker::stack_depth(unsigned long int d) {
if (depth < root_depth + d)
depth = root_depth + d;
}
forceinline unsigned long int
Worker::steal_depth(unsigned long int d) const {
return root_depth + d;
}
}}
#endif
// STATISTICS: search-other
Gecode::Search::Options
Search engine options
Definition search.hh:746
Gecode::Search::Options::stop
Stop * stop
Stop object for stopping search.
Definition search.hh:765
Gecode::Search::Statistics::reset
void reset(void)
Reset.
Definition statistics.hpp:39
Gecode::Search::Statistics::Statistics
Statistics(void)
Initialize.
Definition statistics.hpp:45
Gecode::Search::Statistics::depth
unsigned long int depth
Maximum depth of search stack.
Definition search.hh:154
Gecode::Search::Stop::stop
virtual bool stop(const Statistics &s, const Options &o)=0
Stop search, if returns true.
Gecode::Search::Worker::_stopped
bool _stopped
Whether engine has been stopped.
Definition worker.hh:47
Gecode::Search::Worker::start
void start(void)
Reset stop information.
Definition worker.hh:74
Gecode::Search::Worker::root_depth
unsigned long int root_depth
Depth of root node (for work stealing).
Definition worker.hh:49
Gecode::Search::Worker::stopped
bool stopped(void) const
Check whether engine has been stopped.
Definition worker.hh:87
Gecode::Search::Worker::Worker
Worker(void)
Initialize.
Definition worker.hh:70
Gecode::Search::Worker::steal_depth
unsigned long int steal_depth(unsigned long int d) const
Return steal depth.
Definition worker.hh:106
Gecode::Search::Worker::stop
bool stop(const Options &o)
Check whether engine must be stopped.
Definition worker.hh:79
Gecode::Search::Worker::stack_depth
void stack_depth(unsigned long int d)
Record stack depth d.
Definition worker.hh:100
Gecode::StatusStatistics::reset
void reset(void)
Reset information.
Definition core.hpp:4690
Gecode::Search
Search engines
Gecode
Gecode toplevel namespace
search.hh
forceinline
#define forceinline
Definition config.hpp:187