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/**
* Copyright (C) 2022-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.
*/
#pragma once
#include "mongo/db/operation_context.h"
#include "mongo/db/resource_yielder.h"
namespace mongo {
/**
* Implementation of ResourceYielder that yields resources checked out in the course of running a
* local replica set transaction.
*/
class TransactionParticipantResourceYielder : public ResourceYielder {
public:
TransactionParticipantResourceYielder(StringData cmdName) : _cmdName(cmdName) {
invariant(!cmdName.empty());
}
/**
* Returns a newly allocated yielder.
*/
static std::unique_ptr<TransactionParticipantResourceYielder> make(StringData cmdName);
/**
* If the opCtx has a checked out Session, yields it and stashed its TransactionParticipant
* resources.
*/
void yield(OperationContext* opCtx) override;
/**
* If the opCtx had previously checked out a Session, checks it back out and unstashes its
* TransactionParticipant resources. Note this may throw if the opCtx has been interrupted.
*/
void unyield(OperationContext* opCtx) override;
private:
bool _yielded = false;
std::string _cmdName;
};
} // namespace mongo
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