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1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef NET_DISK_CACHE_SIMPLE_SIMPLE_BACKEND_IMPL_H_ | 5 #ifndef NET_DISK_CACHE_SIMPLE_SIMPLE_BACKEND_IMPL_H_ |
6 #define NET_DISK_CACHE_SIMPLE_SIMPLE_BACKEND_IMPL_H_ | 6 #define NET_DISK_CACHE_SIMPLE_SIMPLE_BACKEND_IMPL_H_ |
7 | 7 |
8 #include <string> | 8 #include <string> |
9 #include <utility> | 9 #include <utility> |
10 #include <vector> | 10 #include <vector> |
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90 virtual int CreateEntry(const std::string& key, Entry** entry, | 90 virtual int CreateEntry(const std::string& key, Entry** entry, |
91 const CompletionCallback& callback) OVERRIDE; | 91 const CompletionCallback& callback) OVERRIDE; |
92 virtual int DoomEntry(const std::string& key, | 92 virtual int DoomEntry(const std::string& key, |
93 const CompletionCallback& callback) OVERRIDE; | 93 const CompletionCallback& callback) OVERRIDE; |
94 virtual int DoomAllEntries(const CompletionCallback& callback) OVERRIDE; | 94 virtual int DoomAllEntries(const CompletionCallback& callback) OVERRIDE; |
95 virtual int DoomEntriesBetween(base::Time initial_time, | 95 virtual int DoomEntriesBetween(base::Time initial_time, |
96 base::Time end_time, | 96 base::Time end_time, |
97 const CompletionCallback& callback) OVERRIDE; | 97 const CompletionCallback& callback) OVERRIDE; |
98 virtual int DoomEntriesSince(base::Time initial_time, | 98 virtual int DoomEntriesSince(base::Time initial_time, |
99 const CompletionCallback& callback) OVERRIDE; | 99 const CompletionCallback& callback) OVERRIDE; |
100 virtual int OpenNextEntry(void** iter, Entry** next_entry, | 100 virtual int OpenNextEntry(Iterator* iter, Entry** next_entry, |
101 const CompletionCallback& callback) OVERRIDE; | 101 const CompletionCallback& callback) OVERRIDE; |
102 virtual void EndEnumeration(void** iter) OVERRIDE; | |
103 virtual void GetStats( | 102 virtual void GetStats( |
104 std::vector<std::pair<std::string, std::string> >* stats) OVERRIDE; | 103 std::vector<std::pair<std::string, std::string> >* stats) OVERRIDE; |
105 virtual void OnExternalCacheHit(const std::string& key) OVERRIDE; | 104 virtual void OnExternalCacheHit(const std::string& key) OVERRIDE; |
106 | 105 |
107 private: | 106 private: |
108 typedef base::hash_map<uint64, SimpleEntryImpl*> EntryMap; | 107 typedef base::hash_map<uint64, SimpleEntryImpl*> EntryMap; |
109 | 108 |
110 typedef base::Callback<void(base::Time mtime, uint64 max_size, int result)> | 109 typedef base::Callback<void(base::Time mtime, uint64 max_size, int result)> |
111 InitializeIndexCallback; | 110 InitializeIndexCallback; |
112 | 111 |
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151 const CompletionCallback& callback); | 150 const CompletionCallback& callback); |
152 | 151 |
153 // Doom the entry corresponding to |entry_hash|, if it's active or currently | 152 // Doom the entry corresponding to |entry_hash|, if it's active or currently |
154 // pending doom. This function does not block if there is an active entry, | 153 // pending doom. This function does not block if there is an active entry, |
155 // which is very important to prevent races in DoomEntries() above. | 154 // which is very important to prevent races in DoomEntries() above. |
156 int DoomEntryFromHash(uint64 entry_hash, const CompletionCallback & callback); | 155 int DoomEntryFromHash(uint64 entry_hash, const CompletionCallback & callback); |
157 | 156 |
158 // Called when the index is initilized to find the next entry in the iterator | 157 // Called when the index is initilized to find the next entry in the iterator |
159 // |iter|. If there are no more hashes in the iterator list, net::ERR_FAILED | 158 // |iter|. If there are no more hashes in the iterator list, net::ERR_FAILED |
160 // is returned. Otherwise, calls OpenEntryFromHash. | 159 // is returned. Otherwise, calls OpenEntryFromHash. |
161 void GetNextEntryInIterator(void** iter, | 160 void OpenNextEntryImpl(Iterator* iter, |
162 Entry** next_entry, | 161 Entry** next_entry, |
163 const CompletionCallback& callback, | 162 const CompletionCallback& callback, |
164 int error_code); | 163 int index_initialization_error_code); |
165 | 164 |
166 // Called when we tried to open an entry with hash alone. When a blank entry | 165 // Called when we tried to open an entry with hash alone. When a blank entry |
167 // has been created and filled in with information from the disk - based on a | 166 // has been created and filled in with information from the disk - based on a |
168 // hash alone - this checks that a duplicate active entry was not created | 167 // hash alone - this checks that a duplicate active entry was not created |
169 // using a key in the meantime. | 168 // using a key in the meantime. |
170 void OnEntryOpenedFromHash(uint64 hash, | 169 void OnEntryOpenedFromHash(uint64 hash, |
171 Entry** entry, | 170 Entry** entry, |
172 const scoped_refptr<SimpleEntryImpl>& simple_entry, | 171 const scoped_refptr<SimpleEntryImpl>& simple_entry, |
173 const CompletionCallback& callback, | 172 const CompletionCallback& callback, |
174 int error_code); | 173 int error_code); |
175 | 174 |
176 // Called when we tried to open an entry from key. When the entry has been | 175 // Called when we tried to open an entry from key. When the entry has been |
177 // opened, a check for key mismatch is performed. | 176 // opened, a check for key mismatch is performed. |
178 void OnEntryOpenedFromKey(const std::string key, | 177 void OnEntryOpenedFromKey(const std::string key, |
179 Entry** entry, | 178 Entry** entry, |
180 const scoped_refptr<SimpleEntryImpl>& simple_entry, | 179 const scoped_refptr<SimpleEntryImpl>& simple_entry, |
181 const CompletionCallback& callback, | 180 const CompletionCallback& callback, |
182 int error_code); | 181 int error_code); |
183 | 182 |
184 // Called at the end of the asynchronous operation triggered by | 183 // Called at the end of the asynchronous operation triggered by |
185 // OpenEntryFromHash. Makes sure to continue iterating if the open entry was | 184 // OpenEntryFromHash. Makes sure to continue iterating if the open entry was |
186 // not a success. | 185 // not a success. |
187 void CheckIterationReturnValue(void** iter, | 186 void CheckIterationReturnValue(Iterator* iter, |
188 Entry** entry, | 187 Entry** entry, |
189 const CompletionCallback& callback, | 188 const CompletionCallback& callback, |
190 int error_code); | 189 int error_code); |
191 | 190 |
192 // A callback thunk used by DoomEntries to clear the |entries_pending_doom_| | 191 // A callback thunk used by DoomEntries to clear the |entries_pending_doom_| |
193 // after a mass doom. | 192 // after a mass doom. |
194 void DoomEntriesComplete(scoped_ptr<std::vector<uint64> > entry_hashes, | 193 void DoomEntriesComplete(scoped_ptr<std::vector<uint64> > entry_hashes, |
195 const CompletionCallback& callback, | 194 const CompletionCallback& callback, |
196 int result); | 195 int result); |
197 | 196 |
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211 // is complete. The base::Closure map target is used to store deferred | 210 // is complete. The base::Closure map target is used to store deferred |
212 // operations to be run at the completion of the Doom. | 211 // operations to be run at the completion of the Doom. |
213 base::hash_map<uint64, std::vector<base::Closure> > entries_pending_doom_; | 212 base::hash_map<uint64, std::vector<base::Closure> > entries_pending_doom_; |
214 | 213 |
215 net::NetLog* const net_log_; | 214 net::NetLog* const net_log_; |
216 }; | 215 }; |
217 | 216 |
218 } // namespace disk_cache | 217 } // namespace disk_cache |
219 | 218 |
220 #endif // NET_DISK_CACHE_SIMPLE_SIMPLE_BACKEND_IMPL_H_ | 219 #endif // NET_DISK_CACHE_SIMPLE_SIMPLE_BACKEND_IMPL_H_ |
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