blob: a45cbfcf5ebce5a6a9cd29f2d34c8d9cf9f5a69d (
plain) (
blame)
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
|
// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include "types.h"
#include <vespa/document/base/documentid.h>
#include <vespa/vespalib/stllike/string.h>
#include <iosfwd>
namespace vespalib { class asciistream; }
namespace storage::spi {
/**
* Convenience wrapper for referencing a document ID at a particular timestamp.
*
* Prefer this instead of a std::pair due to named fields and a pre-provided hash function.
*/
struct IdAndTimestamp {
document::DocumentId id;
Timestamp timestamp;
IdAndTimestamp();
IdAndTimestamp(document::DocumentId id_, Timestamp timestamp_) noexcept;
IdAndTimestamp(const IdAndTimestamp&);
IdAndTimestamp& operator=(const IdAndTimestamp&);
IdAndTimestamp(IdAndTimestamp&&) noexcept;
IdAndTimestamp& operator=(IdAndTimestamp&&) noexcept;
bool operator==(const IdAndTimestamp& rhs) const noexcept {
return ((id == rhs.id) && (timestamp == rhs.timestamp));
}
void print(vespalib::asciistream&) const;
vespalib::string to_string() const;
struct hash {
size_t operator()(const IdAndTimestamp& id_ts) const noexcept {
const size_t h = document::GlobalId::hash()(id_ts.id.getGlobalId());
return h ^ (id_ts.timestamp + 0x9e3779b9U + (h << 6U) + (h >> 2U)); // Basically boost::hash_combine
}
};
};
vespalib::asciistream& operator<<(vespalib::asciistream&, const IdAndTimestamp&);
std::ostream& operator<<(std::ostream&, const IdAndTimestamp&);
}
|
