blob: 5874104f6eedb915a76b68e760a8f9fa58293a6c (
plain)
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
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
|
// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/cache_storage/cache_storage_index.h"
#include <utility>
namespace content {
CacheStorageIndex::CacheStorageIndex()
: doomed_cache_metadata_("",
CacheStorage::kSizeUnknown,
CacheStorage::kSizeUnknown,
"") {
ClearDoomedCache();
}
CacheStorageIndex::~CacheStorageIndex() = default;
CacheStorageIndex& CacheStorageIndex::operator=(CacheStorageIndex&& rhs) {
DCHECK(!has_doomed_cache_);
ordered_cache_metadata_ = std::move(rhs.ordered_cache_metadata_);
cache_metadata_map_ = std::move(rhs.cache_metadata_map_);
storage_size_ = rhs.storage_size_;
storage_padding_ = rhs.storage_padding_;
rhs.storage_size_ = CacheStorage::kSizeUnknown;
rhs.storage_padding_ = CacheStorage::kSizeUnknown;
return *this;
}
void CacheStorageIndex::Insert(const CacheMetadata& cache_metadata) {
DCHECK(!has_doomed_cache_);
DCHECK(cache_metadata_map_.find(cache_metadata.name) ==
cache_metadata_map_.end());
ordered_cache_metadata_.push_back(cache_metadata);
cache_metadata_map_[cache_metadata.name] = --ordered_cache_metadata_.end();
storage_size_ = CacheStorage::kSizeUnknown;
storage_padding_ = CacheStorage::kSizeUnknown;
}
void CacheStorageIndex::Delete(const std::string& cache_name) {
DCHECK(!has_doomed_cache_);
auto it = cache_metadata_map_.find(cache_name);
DCHECK(it != cache_metadata_map_.end());
ordered_cache_metadata_.erase(it->second);
cache_metadata_map_.erase(it);
storage_size_ = CacheStorage::kSizeUnknown;
storage_padding_ = CacheStorage::kSizeUnknown;
}
bool CacheStorageIndex::SetCacheSize(const std::string& cache_name,
int64_t size) {
if (has_doomed_cache_)
DCHECK_NE(cache_name, doomed_cache_metadata_.name);
auto it = cache_metadata_map_.find(cache_name);
DCHECK(it != cache_metadata_map_.end());
if (it->second->size == size)
return false;
it->second->size = size;
storage_size_ = CacheStorage::kSizeUnknown;
return true;
}
const CacheStorageIndex::CacheMetadata* CacheStorageIndex::GetMetadata(
const std::string& cache_name) const {
const auto& it = cache_metadata_map_.find(cache_name);
if (it == cache_metadata_map_.end())
return nullptr;
return &*it->second;
}
int64_t CacheStorageIndex::GetCacheSizeForTesting(
const std::string& cache_name) const {
const auto& it = cache_metadata_map_.find(cache_name);
if (it == cache_metadata_map_.end())
return CacheStorage::kSizeUnknown;
return it->second->size;
}
bool CacheStorageIndex::SetCachePadding(const std::string& cache_name,
int64_t padding) {
DCHECK(!has_doomed_cache_ || cache_name != doomed_cache_metadata_.name)
<< "Setting padding of doomed cache: \"" << cache_name << '"';
auto it = cache_metadata_map_.find(cache_name);
DCHECK(it != cache_metadata_map_.end());
if (it->second->padding == padding)
return false;
it->second->padding = padding;
storage_padding_ = CacheStorage::kSizeUnknown;
return true;
}
int64_t CacheStorageIndex::GetCachePaddingForTesting(
const std::string& cache_name) const {
const auto& it = cache_metadata_map_.find(cache_name);
if (it == cache_metadata_map_.end())
return CacheStorage::kSizeUnknown;
return it->second->padding;
}
int64_t CacheStorageIndex::GetPaddedStorageSize() {
if (storage_size_ == CacheStorage::kSizeUnknown)
UpdateStorageSize();
if (storage_padding_ == CacheStorage::kSizeUnknown)
CalculateStoragePadding();
if (storage_size_ == CacheStorage::kSizeUnknown ||
storage_padding_ == CacheStorage::kSizeUnknown) {
return CacheStorage::kSizeUnknown;
}
return storage_size_ + storage_padding_;
}
void CacheStorageIndex::UpdateStorageSize() {
int64_t storage_size = 0;
storage_size_ = CacheStorage::kSizeUnknown;
for (const CacheMetadata& info : ordered_cache_metadata_) {
if (info.size == CacheStorage::kSizeUnknown)
return;
storage_size += info.size;
}
storage_size_ = storage_size;
}
void CacheStorageIndex::CalculateStoragePadding() {
int64_t storage_padding = 0;
storage_padding_ = CacheStorage::kSizeUnknown;
for (const CacheMetadata& info : ordered_cache_metadata_) {
if (info.padding == CacheStorage::kSizeUnknown)
return;
storage_padding += info.padding;
}
storage_padding_ = storage_padding;
}
void CacheStorageIndex::DoomCache(const std::string& cache_name) {
DCHECK(!has_doomed_cache_);
auto map_it = cache_metadata_map_.find(cache_name);
DCHECK(map_it != cache_metadata_map_.end());
doomed_cache_metadata_ = std::move(*(map_it->second));
after_doomed_cache_metadata_ = ordered_cache_metadata_.erase(map_it->second);
cache_metadata_map_.erase(map_it);
storage_size_ = CacheStorage::kSizeUnknown;
storage_padding_ = CacheStorage::kSizeUnknown;
has_doomed_cache_ = true;
}
void CacheStorageIndex::FinalizeDoomedCache() {
DCHECK(has_doomed_cache_);
ClearDoomedCache();
}
void CacheStorageIndex::RestoreDoomedCache() {
DCHECK(has_doomed_cache_);
const auto cache_name = doomed_cache_metadata_.name;
cache_metadata_map_[cache_name] = ordered_cache_metadata_.insert(
after_doomed_cache_metadata_, std::move(doomed_cache_metadata_));
after_doomed_cache_metadata_ = ordered_cache_metadata_.end();
storage_size_ = CacheStorage::kSizeUnknown;
storage_padding_ = CacheStorage::kSizeUnknown;
ClearDoomedCache();
}
void CacheStorageIndex::ClearDoomedCache() {
doomed_cache_metadata_.name.clear();
after_doomed_cache_metadata_ = ordered_cache_metadata_.end();
has_doomed_cache_ = false;
}
} // namespace content
|