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1 // Copyright (c) 2006-2010 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2006-2010 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 // See net/disk_cache/disk_cache.h for the public interface of the cache. | 5 // See net/disk_cache/disk_cache.h for the public interface of the cache. |
6 | 6 |
7 #ifndef NET_DISK_CACHE_BACKEND_IMPL_H_ | 7 #ifndef NET_DISK_CACHE_BACKEND_IMPL_H_ |
8 #define NET_DISK_CACHE_BACKEND_IMPL_H_ | 8 #define NET_DISK_CACHE_BACKEND_IMPL_H_ |
9 | 9 |
10 #include "base/file_path.h" | 10 #include "base/file_path.h" |
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56 static int CreateBackend(const FilePath& full_path, bool force, | 56 static int CreateBackend(const FilePath& full_path, bool force, |
57 int max_bytes, net::CacheType type, | 57 int max_bytes, net::CacheType type, |
58 uint32 flags, base::MessageLoopProxy* thread, | 58 uint32 flags, base::MessageLoopProxy* thread, |
59 Backend** backend, CompletionCallback* callback); | 59 Backend** backend, CompletionCallback* callback); |
60 | 60 |
61 // Performs general initialization for this current instance of the cache. | 61 // Performs general initialization for this current instance of the cache. |
62 bool Init(); | 62 bool Init(); |
63 | 63 |
64 // Backend interface. | 64 // Backend interface. |
65 virtual int32 GetEntryCount() const; | 65 virtual int32 GetEntryCount() const; |
66 virtual bool OpenEntry(const std::string& key, Entry** entry); | |
67 virtual int OpenEntry(const std::string& key, Entry** entry, | 66 virtual int OpenEntry(const std::string& key, Entry** entry, |
68 CompletionCallback* callback); | 67 CompletionCallback* callback); |
69 virtual bool CreateEntry(const std::string& key, Entry** entry); | |
70 virtual int CreateEntry(const std::string& key, Entry** entry, | 68 virtual int CreateEntry(const std::string& key, Entry** entry, |
71 CompletionCallback* callback); | 69 CompletionCallback* callback); |
72 virtual bool DoomEntry(const std::string& key); | |
73 virtual int DoomEntry(const std::string& key, CompletionCallback* callback); | 70 virtual int DoomEntry(const std::string& key, CompletionCallback* callback); |
74 virtual bool DoomAllEntries(); | |
75 virtual int DoomAllEntries(CompletionCallback* callback); | 71 virtual int DoomAllEntries(CompletionCallback* callback); |
76 virtual bool DoomEntriesBetween(const base::Time initial_time, | |
77 const base::Time end_time); | |
78 virtual int DoomEntriesBetween(const base::Time initial_time, | 72 virtual int DoomEntriesBetween(const base::Time initial_time, |
79 const base::Time end_time, | 73 const base::Time end_time, |
80 CompletionCallback* callback); | 74 CompletionCallback* callback); |
81 virtual bool DoomEntriesSince(const base::Time initial_time); | |
82 virtual int DoomEntriesSince(const base::Time initial_time, | 75 virtual int DoomEntriesSince(const base::Time initial_time, |
83 CompletionCallback* callback); | 76 CompletionCallback* callback); |
84 virtual bool OpenNextEntry(void** iter, Entry** next_entry); | |
85 virtual int OpenNextEntry(void** iter, Entry** next_entry, | 77 virtual int OpenNextEntry(void** iter, Entry** next_entry, |
86 CompletionCallback* callback); | 78 CompletionCallback* callback); |
87 virtual void EndEnumeration(void** iter); | 79 virtual void EndEnumeration(void** iter); |
88 virtual void GetStats(StatsItems* stats); | 80 virtual void GetStats(StatsItems* stats); |
89 | 81 |
90 // Sets the maximum size for the total amount of data stored by this instance. | 82 // Sets the maximum size for the total amount of data stored by this instance. |
91 bool SetMaxSize(int max_bytes); | 83 bool SetMaxSize(int max_bytes); |
92 | 84 |
93 // Sets the cache type for this backend. | 85 // Sets the cache type for this backend. |
94 void SetType(net::CacheType type); | 86 void SetType(net::CacheType type); |
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201 // Clears the counter of references to test handling of corruptions. | 193 // Clears the counter of references to test handling of corruptions. |
202 void ClearRefCountForTest(); | 194 void ClearRefCountForTest(); |
203 | 195 |
204 // Peforms a simple self-check, and returns the number of dirty items | 196 // Peforms a simple self-check, and returns the number of dirty items |
205 // or an error code (negative value). | 197 // or an error code (negative value). |
206 int SelfCheck(); | 198 int SelfCheck(); |
207 | 199 |
208 // Same bahavior as OpenNextEntry but walks the list from back to front. | 200 // Same bahavior as OpenNextEntry but walks the list from back to front. |
209 bool OpenPrevEntry(void** iter, Entry** prev_entry); | 201 bool OpenPrevEntry(void** iter, Entry** prev_entry); |
210 | 202 |
| 203 // Old Backend interface. |
| 204 bool OpenEntry(const std::string& key, Entry** entry); |
| 205 bool CreateEntry(const std::string& key, Entry** entry); |
| 206 bool DoomEntry(const std::string& key); |
| 207 bool DoomAllEntries(); |
| 208 bool DoomEntriesBetween(const base::Time initial_time, |
| 209 const base::Time end_time); |
| 210 bool DoomEntriesSince(const base::Time initial_time); |
| 211 bool OpenNextEntry(void** iter, Entry** next_entry); |
| 212 |
| 213 // Open or create an entry for the given |key|. |
| 214 EntryImpl* OpenEntryImpl(const std::string& key); |
| 215 EntryImpl* CreateEntryImpl(const std::string& key); |
| 216 |
211 private: | 217 private: |
212 typedef base::hash_map<CacheAddr, EntryImpl*> EntriesMap; | 218 typedef base::hash_map<CacheAddr, EntryImpl*> EntriesMap; |
213 | 219 |
214 // Creates a new backing file for the cache index. | 220 // Creates a new backing file for the cache index. |
215 bool CreateBackingStore(disk_cache::File* file); | 221 bool CreateBackingStore(disk_cache::File* file); |
216 bool InitBackingStore(bool* file_created); | 222 bool InitBackingStore(bool* file_created); |
217 void AdjustMaxCacheSize(int table_len); | 223 void AdjustMaxCacheSize(int table_len); |
218 | 224 |
219 // Deletes the cache and starts again. | 225 // Deletes the cache and starts again. |
220 void RestartCache(); | 226 void RestartCache(); |
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237 // be set to NULL; in other words, it is used as an explicit iterator. | 243 // be set to NULL; in other words, it is used as an explicit iterator. |
238 bool OpenFollowingEntryFromList(bool forward, Rankings::List list, | 244 bool OpenFollowingEntryFromList(bool forward, Rankings::List list, |
239 CacheRankingsBlock** from_entry, | 245 CacheRankingsBlock** from_entry, |
240 EntryImpl** next_entry); | 246 EntryImpl** next_entry); |
241 | 247 |
242 // Returns the entry that is pointed by |next|. If we are trimming the cache, | 248 // Returns the entry that is pointed by |next|. If we are trimming the cache, |
243 // |to_evict| should be true so that we don't perform extra disk writes. | 249 // |to_evict| should be true so that we don't perform extra disk writes. |
244 EntryImpl* GetEnumeratedEntry(CacheRankingsBlock* next, bool to_evict); | 250 EntryImpl* GetEnumeratedEntry(CacheRankingsBlock* next, bool to_evict); |
245 | 251 |
246 // Re-opens an entry that was previously deleted. | 252 // Re-opens an entry that was previously deleted. |
247 bool ResurrectEntry(EntryImpl* deleted_entry, Entry** entry); | 253 EntryImpl* ResurrectEntry(EntryImpl* deleted_entry); |
248 | 254 |
249 void DestroyInvalidEntry(EntryImpl* entry); | 255 void DestroyInvalidEntry(EntryImpl* entry); |
250 void DestroyInvalidEntryFromEnumeration(EntryImpl* entry); | 256 void DestroyInvalidEntryFromEnumeration(EntryImpl* entry); |
251 | 257 |
252 // Handles the used storage count. | 258 // Handles the used storage count. |
253 void AddStorageSize(int32 bytes); | 259 void AddStorageSize(int32 bytes); |
254 void SubstractStorageSize(int32 bytes); | 260 void SubstractStorageSize(int32 bytes); |
255 | 261 |
256 // Update the number of referenced cache entries. | 262 // Update the number of referenced cache entries. |
257 void IncreaseNumRefs(); | 263 void IncreaseNumRefs(); |
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307 | 313 |
308 DISALLOW_COPY_AND_ASSIGN(BackendImpl); | 314 DISALLOW_COPY_AND_ASSIGN(BackendImpl); |
309 }; | 315 }; |
310 | 316 |
311 // Returns the prefered max cache size given the available disk space. | 317 // Returns the prefered max cache size given the available disk space. |
312 int PreferedCacheSize(int64 available); | 318 int PreferedCacheSize(int64 available); |
313 | 319 |
314 } // namespace disk_cache | 320 } // namespace disk_cache |
315 | 321 |
316 #endif // NET_DISK_CACHE_BACKEND_IMPL_H_ | 322 #endif // NET_DISK_CACHE_BACKEND_IMPL_H_ |
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