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/**
* Copyright (C) 2020-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 <mutex>
#include "mongo/base/status.h"
#include "mongo/base/string_data.h"
#include "mongo/db/wire_version.h"
#include "mongo/platform/mutex.h"
#include "mongo/util/clock_source.h"
#include "mongo/util/concurrency/with_lock.h"
#include "mongo/util/uuid.h"
namespace mongo {
namespace repl {
class ReplSyncSharedData {
public:
ReplSyncSharedData(ClockSource* clock) : _clock(clock) {}
virtual ~ReplSyncSharedData() {}
ClockSource* getClock() const {
return _clock;
}
/**
* BasicLockable C++ methods; they merely delegate to the mutex.
* The presence of these methods means we can use stdx::unique_lock<ReplSyncSharedData> and
* stdx::lock_guard<ReplSyncSharedData>.
*/
void lock();
void unlock();
/**
* In all cases below, the lock must be a lock on this object itself for access to be valid.
*/
Status getStatus(WithLock lk);
void setStatus(WithLock lk, Status newStatus);
/**
* Sets the status to the new status if and only if the old status is "OK".
*/
void setStatusIfOK(WithLock lk, Status newStatus);
private:
// Clock source used for timing outages and recording stats.
ClockSource* const _clock;
mutable Mutex _mutex = MONGO_MAKE_LATCH("ReplSyncSharedData::_mutex"_sd);
// Status of the entire sync process. All syncing tasks should exit if this becomes non-OK.
Status _status = Status::OK();
};
} // namespace repl
} // namespace mongo
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