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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-21 11:54:28 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-21 11:54:28 +0000 |
commit | e6918187568dbd01842d8d1d2c808ce16a894239 (patch) | |
tree | 64f88b554b444a49f656b6c656111a145cbbaa28 /src/rocksdb/utilities/transactions/optimistic_transaction_db_impl.h | |
parent | Initial commit. (diff) | |
download | ceph-e6918187568dbd01842d8d1d2c808ce16a894239.tar.xz ceph-e6918187568dbd01842d8d1d2c808ce16a894239.zip |
Adding upstream version 18.2.2.upstream/18.2.2
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/rocksdb/utilities/transactions/optimistic_transaction_db_impl.h')
-rw-r--r-- | src/rocksdb/utilities/transactions/optimistic_transaction_db_impl.h | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/src/rocksdb/utilities/transactions/optimistic_transaction_db_impl.h b/src/rocksdb/utilities/transactions/optimistic_transaction_db_impl.h new file mode 100644 index 000000000..88e86ea4a --- /dev/null +++ b/src/rocksdb/utilities/transactions/optimistic_transaction_db_impl.h @@ -0,0 +1,88 @@ +// Copyright (c) 2011-present, Facebook, Inc. All rights reserved. +// This source code is licensed under both the GPLv2 (found in the +// COPYING file in the root directory) and Apache 2.0 License +// (found in the LICENSE.Apache file in the root directory). + +#pragma once +#ifndef ROCKSDB_LITE + +#include <algorithm> +#include <mutex> +#include <vector> + +#include "rocksdb/db.h" +#include "rocksdb/options.h" +#include "rocksdb/utilities/optimistic_transaction_db.h" + +namespace ROCKSDB_NAMESPACE { + +class OptimisticTransactionDBImpl : public OptimisticTransactionDB { + public: + explicit OptimisticTransactionDBImpl( + DB* db, const OptimisticTransactionDBOptions& occ_options, + bool take_ownership = true) + : OptimisticTransactionDB(db), + db_owner_(take_ownership), + validate_policy_(occ_options.validate_policy) { + if (validate_policy_ == OccValidationPolicy::kValidateParallel) { + uint32_t bucket_size = std::max(16u, occ_options.occ_lock_buckets); + bucketed_locks_.reserve(bucket_size); + for (size_t i = 0; i < bucket_size; ++i) { + bucketed_locks_.emplace_back( + std::unique_ptr<std::mutex>(new std::mutex)); + } + } + } + + ~OptimisticTransactionDBImpl() { + // Prevent this stackable from destroying + // base db + if (!db_owner_) { + db_ = nullptr; + } + } + + Transaction* BeginTransaction(const WriteOptions& write_options, + const OptimisticTransactionOptions& txn_options, + Transaction* old_txn) override; + + // Transactional `DeleteRange()` is not yet supported. + using StackableDB::DeleteRange; + virtual Status DeleteRange(const WriteOptions&, ColumnFamilyHandle*, + const Slice&, const Slice&) override { + return Status::NotSupported(); + } + + // Range deletions also must not be snuck into `WriteBatch`es as they are + // incompatible with `OptimisticTransactionDB`. + virtual Status Write(const WriteOptions& write_opts, + WriteBatch* batch) override { + if (batch->HasDeleteRange()) { + return Status::NotSupported(); + } + return OptimisticTransactionDB::Write(write_opts, batch); + } + + size_t GetLockBucketsSize() const { return bucketed_locks_.size(); } + + OccValidationPolicy GetValidatePolicy() const { return validate_policy_; } + + std::unique_lock<std::mutex> LockBucket(size_t idx); + + private: + // NOTE: used in validation phase. Each key is hashed into some + // bucket. We then take the lock in the hash value order to avoid deadlock. + std::vector<std::unique_ptr<std::mutex>> bucketed_locks_; + + bool db_owner_; + + const OccValidationPolicy validate_policy_; + + void ReinitializeTransaction(Transaction* txn, + const WriteOptions& write_options, + const OptimisticTransactionOptions& txn_options = + OptimisticTransactionOptions()); +}; + +} // namespace ROCKSDB_NAMESPACE +#endif // ROCKSDB_LITE |