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
55 lines
1.4 KiB
C++
55 lines
1.4 KiB
C++
// 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
|
|
|
|
#include <stdint.h>
|
|
#include "rocksdb/slice.h"
|
|
|
|
namespace ROCKSDB_NAMESPACE {
|
|
|
|
// Define all public custom types here.
|
|
|
|
// Represents a sequence number in a WAL file.
|
|
typedef uint64_t SequenceNumber;
|
|
|
|
const SequenceNumber kMinUnCommittedSeq = 1; // 0 is always committed
|
|
|
|
// User-oriented representation of internal key types.
|
|
enum EntryType {
|
|
kEntryPut,
|
|
kEntryDelete,
|
|
kEntrySingleDelete,
|
|
kEntryMerge,
|
|
kEntryRangeDeletion,
|
|
kEntryBlobIndex,
|
|
kEntryOther,
|
|
};
|
|
|
|
// <user key, sequence number, and entry type> tuple.
|
|
struct FullKey {
|
|
Slice user_key;
|
|
SequenceNumber sequence;
|
|
EntryType type;
|
|
|
|
FullKey() : sequence(0) {} // Intentionally left uninitialized (for speed)
|
|
FullKey(const Slice& u, const SequenceNumber& seq, EntryType t)
|
|
: user_key(u), sequence(seq), type(t) {}
|
|
std::string DebugString(bool hex = false) const;
|
|
|
|
void clear() {
|
|
user_key.clear();
|
|
sequence = 0;
|
|
type = EntryType::kEntryPut;
|
|
}
|
|
};
|
|
|
|
// Parse slice representing internal key to FullKey
|
|
// Parsed FullKey is valid for as long as the memory pointed to by
|
|
// internal_key is alive.
|
|
bool ParseFullKey(const Slice& internal_key, FullKey* result);
|
|
|
|
} // namespace ROCKSDB_NAMESPACE
|