64324e329e
Summary: As you know, almost all compilers support "pragma once" keyword instead of using include guards. To be keep consistency between header files, all header files are edited. Besides this, try to fix some warnings about loss of data. Pull Request resolved: https://github.com/facebook/rocksdb/pull/4339 Differential Revision: D9654990 Pulled By: ajkr fbshipit-source-id: c2cf3d2d03a599847684bed81378c401920ca848
55 lines
1.4 KiB
C++
55 lines
1.4 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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#include <stdint.h>
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#include "rocksdb/slice.h"
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namespace rocksdb {
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// Define all public custom types here.
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// Represents a sequence number in a WAL file.
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typedef uint64_t SequenceNumber;
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// User-oriented representation of internal key types.
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enum EntryType {
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kEntryPut,
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kEntryDelete,
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kEntrySingleDelete,
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kEntryMerge,
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kEntryRangeDeletion,
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kEntryBlobIndex,
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kEntryOther,
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};
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// <user key, sequence number, and entry type> tuple.
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struct FullKey {
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Slice user_key;
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SequenceNumber sequence;
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EntryType type;
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FullKey()
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: sequence(0)
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{} // Intentionally left uninitialized (for speed)
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FullKey(const Slice& u, const SequenceNumber& seq, EntryType t)
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: user_key(u), sequence(seq), type(t) { }
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std::string DebugString(bool hex = false) const;
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void clear() {
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user_key.clear();
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sequence = 0;
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type = EntryType::kEntryPut;
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}
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};
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// Parse slice representing internal key to FullKey
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// Parsed FullKey is valid for as long as the memory pointed to by
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// internal_key is alive.
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bool ParseFullKey(const Slice& internal_key, FullKey* result);
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} // namespace rocksdb
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