/** * Copyright (C) 2021-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 * . * * 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/operation_context.h" #include "mongo/db/storage/record_store.h" namespace mongo { Status RecordStore::oplogDiskLocRegister(OperationContext* opCtx, const Timestamp& opTime, bool orderedCommit) { // Callers should be updating visibility as part of a write operation. We want to ensure that // we never get here while holding an uninterruptible, read-ticketed lock. That would indicate // that we are operating with the wrong global lock semantics, and either hold too weak a lock // (e.g. IS) or that we upgraded in a way we shouldn't (e.g. IS -> IX). invariant(opCtx->lockState()->isNoop() || !opCtx->lockState()->hasReadTicket() || !opCtx->lockState()->uninterruptibleLocksRequested()); return oplogDiskLocRegisterImpl(opCtx, opTime, orderedCommit); } void RecordStore::waitForAllEarlierOplogWritesToBeVisible(OperationContext* opCtx) const { // Callers are waiting for other operations to finish updating visibility. We want to ensure // that we never get here while holding an uninterruptible, write-ticketed lock. That could // indicate we are holding a stronger lock than we need to, and that we could actually // contribute to ticket-exhaustion. That could prevent the write we are waiting on from // acquiring the lock it needs to update the oplog visibility. invariant(opCtx->lockState()->isNoop() || !opCtx->lockState()->hasWriteTicket() || !opCtx->lockState()->uninterruptibleLocksRequested()); waitForAllEarlierOplogWritesToBeVisibleImpl(opCtx); } } // namespace mongo