OLD | NEW |
| (Empty) |
1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #include "webkit/browser/dom_storage/dom_storage_namespace.h" | |
6 | |
7 #include "base/basictypes.h" | |
8 #include "base/bind.h" | |
9 #include "base/location.h" | |
10 #include "base/logging.h" | |
11 #include "webkit/browser/dom_storage/dom_storage_area.h" | |
12 #include "webkit/browser/dom_storage/dom_storage_task_runner.h" | |
13 #include "webkit/browser/dom_storage/session_storage_database.h" | |
14 #include "webkit/common/dom_storage/dom_storage_types.h" | |
15 | |
16 namespace dom_storage { | |
17 | |
18 DomStorageNamespace::DomStorageNamespace( | |
19 const base::FilePath& directory, | |
20 DomStorageTaskRunner* task_runner) | |
21 : namespace_id_(kLocalStorageNamespaceId), | |
22 directory_(directory), | |
23 task_runner_(task_runner) { | |
24 } | |
25 | |
26 DomStorageNamespace::DomStorageNamespace( | |
27 int64 namespace_id, | |
28 const std::string& persistent_namespace_id, | |
29 SessionStorageDatabase* session_storage_database, | |
30 DomStorageTaskRunner* task_runner) | |
31 : namespace_id_(namespace_id), | |
32 persistent_namespace_id_(persistent_namespace_id), | |
33 task_runner_(task_runner), | |
34 session_storage_database_(session_storage_database) { | |
35 DCHECK_NE(kLocalStorageNamespaceId, namespace_id); | |
36 } | |
37 | |
38 DomStorageNamespace::~DomStorageNamespace() { | |
39 } | |
40 | |
41 DomStorageArea* DomStorageNamespace::OpenStorageArea(const GURL& origin) { | |
42 if (AreaHolder* holder = GetAreaHolder(origin)) { | |
43 ++(holder->open_count_); | |
44 return holder->area_.get(); | |
45 } | |
46 DomStorageArea* area; | |
47 if (namespace_id_ == kLocalStorageNamespaceId) { | |
48 area = new DomStorageArea(origin, directory_, task_runner_.get()); | |
49 } else { | |
50 area = new DomStorageArea( | |
51 namespace_id_, persistent_namespace_id_, origin, | |
52 session_storage_database_.get(), task_runner_.get()); | |
53 } | |
54 areas_[origin] = AreaHolder(area, 1); | |
55 return area; | |
56 } | |
57 | |
58 void DomStorageNamespace::CloseStorageArea(DomStorageArea* area) { | |
59 AreaHolder* holder = GetAreaHolder(area->origin()); | |
60 DCHECK(holder); | |
61 DCHECK_EQ(holder->area_.get(), area); | |
62 --(holder->open_count_); | |
63 // TODO(michaeln): Clean up areas that aren't needed in memory anymore. | |
64 // The in-process-webkit based impl didn't do this either, but would be nice. | |
65 } | |
66 | |
67 DomStorageArea* DomStorageNamespace::GetOpenStorageArea(const GURL& origin) { | |
68 AreaHolder* holder = GetAreaHolder(origin); | |
69 if (holder && holder->open_count_) | |
70 return holder->area_.get(); | |
71 return NULL; | |
72 } | |
73 | |
74 DomStorageNamespace* DomStorageNamespace::Clone( | |
75 int64 clone_namespace_id, | |
76 const std::string& clone_persistent_namespace_id) { | |
77 DCHECK_NE(kLocalStorageNamespaceId, namespace_id_); | |
78 DCHECK_NE(kLocalStorageNamespaceId, clone_namespace_id); | |
79 DomStorageNamespace* clone = new DomStorageNamespace( | |
80 clone_namespace_id, clone_persistent_namespace_id, | |
81 session_storage_database_.get(), task_runner_.get()); | |
82 AreaMap::const_iterator it = areas_.begin(); | |
83 // Clone the in-memory structures. | |
84 for (; it != areas_.end(); ++it) { | |
85 DomStorageArea* area = it->second.area_->ShallowCopy( | |
86 clone_namespace_id, clone_persistent_namespace_id); | |
87 clone->areas_[it->first] = AreaHolder(area, 0); | |
88 } | |
89 // And clone the on-disk structures, too. | |
90 if (session_storage_database_.get()) { | |
91 task_runner_->PostShutdownBlockingTask( | |
92 FROM_HERE, | |
93 DomStorageTaskRunner::COMMIT_SEQUENCE, | |
94 base::Bind(base::IgnoreResult(&SessionStorageDatabase::CloneNamespace), | |
95 session_storage_database_.get(), persistent_namespace_id_, | |
96 clone_persistent_namespace_id)); | |
97 } | |
98 return clone; | |
99 } | |
100 | |
101 void DomStorageNamespace::DeleteLocalStorageOrigin(const GURL& origin) { | |
102 DCHECK(!session_storage_database_.get()); | |
103 AreaHolder* holder = GetAreaHolder(origin); | |
104 if (holder) { | |
105 holder->area_->DeleteOrigin(); | |
106 return; | |
107 } | |
108 if (!directory_.empty()) { | |
109 scoped_refptr<DomStorageArea> area = | |
110 new DomStorageArea(origin, directory_, task_runner_.get()); | |
111 area->DeleteOrigin(); | |
112 } | |
113 } | |
114 | |
115 void DomStorageNamespace::DeleteSessionStorageOrigin(const GURL& origin) { | |
116 DomStorageArea* area = OpenStorageArea(origin); | |
117 area->FastClear(); | |
118 CloseStorageArea(area); | |
119 } | |
120 | |
121 void DomStorageNamespace::PurgeMemory(PurgeOption option) { | |
122 if (directory_.empty()) | |
123 return; // We can't purge w/o backing on disk. | |
124 AreaMap::iterator it = areas_.begin(); | |
125 while (it != areas_.end()) { | |
126 // Leave it alone if changes are pending | |
127 if (it->second.area_->HasUncommittedChanges()) { | |
128 ++it; | |
129 continue; | |
130 } | |
131 | |
132 // If not in use, we can shut it down and remove | |
133 // it from our collection entirely. | |
134 if (it->second.open_count_ == 0) { | |
135 it->second.area_->Shutdown(); | |
136 areas_.erase(it++); | |
137 continue; | |
138 } | |
139 | |
140 if (option == PURGE_AGGRESSIVE) { | |
141 // If aggressive is true, we clear caches and such | |
142 // for opened areas. | |
143 it->second.area_->PurgeMemory(); | |
144 } | |
145 | |
146 ++it; | |
147 } | |
148 } | |
149 | |
150 void DomStorageNamespace::Shutdown() { | |
151 AreaMap::const_iterator it = areas_.begin(); | |
152 for (; it != areas_.end(); ++it) | |
153 it->second.area_->Shutdown(); | |
154 } | |
155 | |
156 unsigned int DomStorageNamespace::CountInMemoryAreas() const { | |
157 unsigned int area_count = 0; | |
158 for (AreaMap::const_iterator it = areas_.begin(); it != areas_.end(); ++it) { | |
159 if (it->second.area_->IsLoadedInMemory()) | |
160 ++area_count; | |
161 } | |
162 return area_count; | |
163 } | |
164 | |
165 DomStorageNamespace::AreaHolder* | |
166 DomStorageNamespace::GetAreaHolder(const GURL& origin) { | |
167 AreaMap::iterator found = areas_.find(origin); | |
168 if (found == areas_.end()) | |
169 return NULL; | |
170 return &(found->second); | |
171 } | |
172 | |
173 // AreaHolder | |
174 | |
175 DomStorageNamespace::AreaHolder::AreaHolder() | |
176 : open_count_(0) { | |
177 } | |
178 | |
179 DomStorageNamespace::AreaHolder::AreaHolder( | |
180 DomStorageArea* area, int count) | |
181 : area_(area), open_count_(count) { | |
182 } | |
183 | |
184 DomStorageNamespace::AreaHolder::~AreaHolder() { | |
185 } | |
186 | |
187 } // namespace dom_storage | |
OLD | NEW |