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/**
* Copyright (C) 2018-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/storage/wiredtiger/wiredtiger_cursor.h"
#include "mongo/db/storage/wiredtiger/wiredtiger_util.h"
namespace mongo {
WiredTigerCursor::WiredTigerCursor(const std::string& uri,
uint64_t tableID,
bool allowOverwrite,
OperationContext* opCtx) {
_tableID = tableID;
_ru = WiredTigerRecoveryUnit::get(opCtx);
_session = _ru->getSession();
_readOnce = _ru->getReadOnce();
if (_readOnce) {
_cursor = _session->getReadOnceCursor(uri, allowOverwrite);
} else {
_cursor = _session->getCursor(uri, tableID, allowOverwrite);
}
}
WiredTigerCursor::~WiredTigerCursor() {
dassert(_ru->getReadOnce() == _readOnce);
// Read-once cursors will never take cursors from the cursor cache, and should never release
// cursors into the cursor cache.
if (_readOnce) {
_session->closeCursor(_cursor);
} else {
_session->releaseCursor(_tableID, _cursor);
}
}
void WiredTigerCursor::reset() {
invariantWTOK(_cursor->reset(_cursor));
}
} // namespace mongo
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