1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
|
// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include <vespa/document/base/globalid.h>
#include <vespa/document/bucket/bucketid.h>
#include <vespa/persistence/spi/types.h>
#include <algorithm>
#include <atomic>
#include <cassert>
namespace proton {
/**
* The raw data that is stored for a single document in the DocumentMetaStore.
*/
struct RawDocumentMetaData
{
using GlobalId = document::GlobalId;
using BucketId = document::BucketId;
using Timestamp = storage::spi::Timestamp;
GlobalId _gid;
std::atomic<uint32_t> _bucket_used_bits_and_doc_size;
std::atomic<uint64_t> _timestamp;
static uint32_t capped_doc_size(uint32_t doc_size) { return std::min(0xffffffu, doc_size); }
RawDocumentMetaData() noexcept
: _gid(),
_bucket_used_bits_and_doc_size(BucketId::minNumBits),
_timestamp(0)
{ }
RawDocumentMetaData(const GlobalId &gid, const BucketId &bucketId, const Timestamp ×tamp, uint32_t docSize) noexcept
: _gid(gid),
_bucket_used_bits_and_doc_size(bucketId.getUsedBits() | (capped_doc_size(docSize) << 8)),
_timestamp(timestamp)
{
assert(bucketId.valid());
BucketId verId(gid.convertToBucketId());
verId.setUsedBits(bucketId.getUsedBits());
assert(bucketId.getRawId() == verId.getRawId() ||
bucketId.getRawId() == verId.getId());
}
RawDocumentMetaData(const RawDocumentMetaData& rhs)
: _gid(rhs._gid),
_bucket_used_bits_and_doc_size(rhs._bucket_used_bits_and_doc_size.load(std::memory_order_relaxed)),
_timestamp(rhs._timestamp.load(std::memory_order_relaxed))
{
}
RawDocumentMetaData& operator=(const RawDocumentMetaData& rhs) {
_gid = rhs._gid;
_bucket_used_bits_and_doc_size.store(rhs._bucket_used_bits_and_doc_size.load(std::memory_order_relaxed), std::memory_order_relaxed);
_timestamp.store(rhs._timestamp.load(std::memory_order_relaxed), std::memory_order_relaxed);
return *this;
}
bool operator<(const GlobalId &rhs) const noexcept { return _gid < rhs; }
bool operator==(const GlobalId &rhs) const noexcept { return _gid == rhs; }
bool operator<(const RawDocumentMetaData &rhs) const noexcept { return _gid < rhs._gid; }
bool operator==(const RawDocumentMetaData &rhs) const noexcept { return _gid == rhs._gid; }
const GlobalId &getGid() const { return _gid; }
GlobalId &getGid() { return _gid; }
void setGid(const GlobalId &rhs) { _gid = rhs; }
uint8_t getBucketUsedBits() const { return _bucket_used_bits_and_doc_size.load(std::memory_order_relaxed) & 0xffu; }
BucketId getBucketId() const {
BucketId ret(_gid.convertToBucketId());
ret.setUsedBits(getBucketUsedBits());
return ret;
}
void setBucketUsedBits(uint8_t bucketUsedBits) {
assert(BucketId::validUsedBits(bucketUsedBits));
_bucket_used_bits_and_doc_size.store((_bucket_used_bits_and_doc_size.load(std::memory_order_relaxed) & ~0xffu) | bucketUsedBits, std::memory_order_relaxed);
}
void setBucketId(const BucketId &bucketId) {
assert(bucketId.valid());
uint8_t bucketUsedBits = bucketId.getUsedBits();
BucketId verId(_gid.convertToBucketId());
verId.setUsedBits(bucketUsedBits);
assert(bucketId.getRawId() == verId.getRawId() ||
bucketId.getRawId() == verId.getId());
setBucketUsedBits(bucketUsedBits);
}
Timestamp getTimestamp() const { return Timestamp(_timestamp.load(std::memory_order_relaxed)); }
void setTimestamp(const Timestamp ×tamp) { _timestamp.store(timestamp.getValue(), std::memory_order_relaxed); }
uint32_t getDocSize() const { return _bucket_used_bits_and_doc_size.load(std::memory_order_relaxed) >> 8; }
void setDocSize(uint32_t docSize) { _bucket_used_bits_and_doc_size.store((_bucket_used_bits_and_doc_size.load(std::memory_order_relaxed) & 0xffu) | (capped_doc_size(docSize) << 8), std::memory_order_relaxed); }
};
} // namespace proton
|
