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// extsort.cpp
/**
* Copyright (C) 2008 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include "mongo/platform/basic.h"
#include "mongo/db/extsort.h"
#include "mongo/db/kill_current_op.h"
#include "mongo/db/storage_options.h"
namespace mongo {
namespace {
class ComparatorWithInterruptCheck {
public:
typedef pair<BSONObj, DiskLoc> Data;
ComparatorWithInterruptCheck(const ExternalSortComparison* comp,
boost::shared_ptr<const bool> mayInterrupt)
: _comp(comp)
, _mayInterrupt(mayInterrupt)
{}
int operator() (const Data& l, const Data& r) const {
RARELY if (*_mayInterrupt) {
killCurrentOp.checkForInterrupt(!*_mayInterrupt);
}
return _comp->compare(l, r);
}
private:
const ExternalSortComparison* _comp;
boost::shared_ptr<const bool> _mayInterrupt;
};
}
BSONObjExternalSorter::BSONObjExternalSorter(const ExternalSortComparison* comp,
long maxFileSize)
: _mayInterrupt(boost::make_shared<bool>(false))
, _sorter(Sorter<BSONObj, DiskLoc>::make(
SortOptions().TempDir(storageGlobalParams.dbpath + "/_tmp")
.ExtSortAllowed()
.MaxMemoryUsageBytes(maxFileSize),
ComparatorWithInterruptCheck(comp, _mayInterrupt)))
{}
}
#include "mongo/db/sorter/sorter.cpp"
MONGO_CREATE_SORTER(mongo::BSONObj, mongo::DiskLoc, mongo::ComparatorWithInterruptCheck);
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