blob: 84330be5919ab0f8a8edda3afd37ea19d2cef740 (
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
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
|
// Copyright Epic Games, Inc. All Rights Reserved.
#pragma once
#include <zencore/iobuffer.h>
#include <zencore/iohash.h>
#include <zenstore/gc.h>
#include <gsl/gsl-lite.hpp>
#include <unordered_map>
namespace zen {
namespace access_tracking {
struct KeyAccessTime
{
IoHash Key;
GcClock::Tick LastAccess{};
};
struct AccessTimes
{
std::unordered_map<std::string, std::vector<KeyAccessTime>> Buckets;
};
}; // namespace access_tracking
struct ZenCacheValue
{
IoBuffer Value;
uint64_t RawSize = 0;
IoHash RawHash = IoHash::Zero;
};
struct CacheValueDetails
{
struct ValueDetails
{
uint64_t Size;
uint64_t RawSize;
IoHash RawHash;
GcClock::Tick LastAccess{};
std::vector<IoHash> Attachments;
ZenContentType ContentType;
};
struct BucketDetails
{
std::unordered_map<IoHash, ValueDetails, IoHash::Hasher> Values;
};
struct NamespaceDetails
{
std::unordered_map<std::string, BucketDetails> Buckets;
};
std::unordered_map<std::string, NamespaceDetails> Namespaces;
};
//////////////////////////////////////////////////////////////////////////
// This store the access time as seconds since epoch internally in a 32-bit value giving is a range of 136 years since epoch
struct AccessTime
{
explicit AccessTime(GcClock::Tick Tick) noexcept : SecondsSinceEpoch(ToSeconds(Tick)) {}
AccessTime& operator=(GcClock::Tick Tick) noexcept
{
SecondsSinceEpoch.store(ToSeconds(Tick), std::memory_order_relaxed);
return *this;
}
operator GcClock::Tick() const noexcept
{
return std::chrono::duration_cast<GcClock::Duration>(std::chrono::seconds(SecondsSinceEpoch.load(std::memory_order_relaxed)))
.count();
}
AccessTime(AccessTime&& Rhs) noexcept : SecondsSinceEpoch(Rhs.SecondsSinceEpoch.load(std::memory_order_relaxed)) {}
AccessTime(const AccessTime& Rhs) noexcept : SecondsSinceEpoch(Rhs.SecondsSinceEpoch.load(std::memory_order_relaxed)) {}
AccessTime& operator=(AccessTime&& Rhs) noexcept
{
SecondsSinceEpoch.store(Rhs.SecondsSinceEpoch.load(std::memory_order_relaxed), std::memory_order_relaxed);
return *this;
}
AccessTime& operator=(const AccessTime& Rhs) noexcept
{
SecondsSinceEpoch.store(Rhs.SecondsSinceEpoch.load(std::memory_order_relaxed), std::memory_order_relaxed);
return *this;
}
private:
static uint32_t ToSeconds(GcClock::Tick Tick)
{
return gsl::narrow<uint32_t>(std::chrono::duration_cast<std::chrono::seconds>(GcClock::Duration(Tick)).count());
}
std::atomic_uint32_t SecondsSinceEpoch;
};
} // namespace zen
|