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/**
* Copyright (C) 2019-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* 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
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* 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 Server Side 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/exec/sort_executor.h"
#include "mongo/db/exec/document_value/value_comparator.h"
#include "mongo/db/exec/working_set.h"
namespace mongo {
namespace {
/**
* Generates a new file name on each call using a static, atomic and monotonically increasing
* number.
*
* Each user of the Sorter must implement this function to ensure that all temporary files that the
* Sorter instances produce are uniquely identified using a unique file name extension with separate
* atomic variable. This is necessary because the sorter.cpp code is separately included in multiple
* places, rather than compiled in one place and linked, and so cannot provide a globally unique ID.
*/
std::string nextFileName() {
static AtomicWord<unsigned> sortExecutorFileCounter;
return "extsort-sort-executor." + std::to_string(sortExecutorFileCounter.fetchAndAdd(1));
}
} // namespace
} // namespace mongo
#include "mongo/db/sorter/sorter.cpp"
MONGO_CREATE_SORTER(mongo::Value,
mongo::Document,
mongo::SortExecutor<mongo::Document>::Comparator);
MONGO_CREATE_SORTER(mongo::Value,
mongo::SortableWorkingSetMember,
mongo::SortExecutor<mongo::SortableWorkingSetMember>::Comparator);
MONGO_CREATE_SORTER(mongo::Value, mongo::BSONObj, mongo::SortExecutor<mongo::BSONObj>::Comparator);
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