fdf882ded2
Summary: When dynamically linking two binaries together, different builds of RocksDB from two sources might cause errors. To provide a tool for user to solve the problem, the RocksDB namespace is changed to a flag which can be overridden in build time. Pull Request resolved: https://github.com/facebook/rocksdb/pull/6433 Test Plan: Build release, all and jtest. Try to build with ROCKSDB_NAMESPACE with another flag. Differential Revision: D19977691 fbshipit-source-id: aa7f2d0972e1c31d75339ac48478f34f6cfcfb3e
72 lines
2.3 KiB
C++
72 lines
2.3 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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#pragma once
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#ifndef ROCKSDB_LITE
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#include <mutex>
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#include <vector>
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#include <algorithm>
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#include "rocksdb/db.h"
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#include "rocksdb/options.h"
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#include "rocksdb/utilities/optimistic_transaction_db.h"
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namespace ROCKSDB_NAMESPACE {
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class OptimisticTransactionDBImpl : public OptimisticTransactionDB {
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public:
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explicit OptimisticTransactionDBImpl(
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DB* db, const OptimisticTransactionDBOptions& occ_options,
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bool take_ownership = true)
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: OptimisticTransactionDB(db),
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db_owner_(take_ownership),
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validate_policy_(occ_options.validate_policy) {
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if (validate_policy_ == OccValidationPolicy::kValidateParallel) {
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uint32_t bucket_size = std::max(16u, occ_options.occ_lock_buckets);
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bucketed_locks_.reserve(bucket_size);
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for (size_t i = 0; i < bucket_size; ++i) {
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bucketed_locks_.emplace_back(
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std::unique_ptr<std::mutex>(new std::mutex));
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}
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}
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}
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~OptimisticTransactionDBImpl() {
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// Prevent this stackable from destroying
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// base db
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if (!db_owner_) {
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db_ = nullptr;
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}
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}
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Transaction* BeginTransaction(const WriteOptions& write_options,
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const OptimisticTransactionOptions& txn_options,
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Transaction* old_txn) override;
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size_t GetLockBucketsSize() const { return bucketed_locks_.size(); }
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OccValidationPolicy GetValidatePolicy() const { return validate_policy_; }
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std::unique_lock<std::mutex> LockBucket(size_t idx);
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private:
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// NOTE: used in validation phase. Each key is hashed into some
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// bucket. We then take the lock in the hash value order to avoid deadlock.
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std::vector<std::unique_ptr<std::mutex>> bucketed_locks_;
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bool db_owner_;
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const OccValidationPolicy validate_policy_;
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void ReinitializeTransaction(Transaction* txn,
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const WriteOptions& write_options,
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const OptimisticTransactionOptions& txn_options =
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OptimisticTransactionOptions());
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};
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} // namespace ROCKSDB_NAMESPACE
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#endif // ROCKSDB_LITE
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