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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 <stdint.h> |
| 9 |
| 8 #include <string> | 10 #include <string> |
| 9 #include <utility> | 11 #include <utility> |
| 10 #include <vector> | 12 #include <vector> |
| 11 | 13 |
| 12 #include "base/callback_forward.h" | 14 #include "base/callback_forward.h" |
| 13 #include "base/compiler_specific.h" | 15 #include "base/compiler_specific.h" |
| 14 #include "base/containers/hash_tables.h" | 16 #include "base/containers/hash_tables.h" |
| 15 #include "base/files/file_path.h" | 17 #include "base/files/file_path.h" |
| 16 #include "base/memory/ref_counted.h" | 18 #include "base/memory/ref_counted.h" |
| 17 #include "base/memory/scoped_ptr.h" | 19 #include "base/memory/scoped_ptr.h" |
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| 70 bool SetMaxSize(int max_bytes); | 72 bool SetMaxSize(int max_bytes); |
| 71 | 73 |
| 72 // Returns the maximum file size permitted in this backend. | 74 // Returns the maximum file size permitted in this backend. |
| 73 int GetMaxFileSize() const; | 75 int GetMaxFileSize() const; |
| 74 | 76 |
| 75 // Flush our SequencedWorkerPool. | 77 // Flush our SequencedWorkerPool. |
| 76 static void FlushWorkerPoolForTesting(); | 78 static void FlushWorkerPoolForTesting(); |
| 77 | 79 |
| 78 // The entry for |entry_hash| is being doomed; the backend will not attempt | 80 // The entry for |entry_hash| is being doomed; the backend will not attempt |
| 79 // run new operations for this |entry_hash| until the Doom is completed. | 81 // run new operations for this |entry_hash| until the Doom is completed. |
| 80 void OnDoomStart(uint64 entry_hash); | 82 void OnDoomStart(uint64_t entry_hash); |
| 81 | 83 |
| 82 // The entry for |entry_hash| has been successfully doomed, we can now allow | 84 // The entry for |entry_hash| has been successfully doomed, we can now allow |
| 83 // operations on this entry, and we can run any operations enqueued while the | 85 // operations on this entry, and we can run any operations enqueued while the |
| 84 // doom completed. | 86 // doom completed. |
| 85 void OnDoomComplete(uint64 entry_hash); | 87 void OnDoomComplete(uint64_t entry_hash); |
| 86 | 88 |
| 87 // SimpleIndexDelegate: | 89 // SimpleIndexDelegate: |
| 88 void DoomEntries(std::vector<uint64>* entry_hashes, | 90 void DoomEntries(std::vector<uint64_t>* entry_hashes, |
| 89 const CompletionCallback& callback) override; | 91 const CompletionCallback& callback) override; |
| 90 | 92 |
| 91 // Backend: | 93 // Backend: |
| 92 net::CacheType GetCacheType() const override; | 94 net::CacheType GetCacheType() const override; |
| 93 int32 GetEntryCount() const override; | 95 int32_t GetEntryCount() const override; |
| 94 int OpenEntry(const std::string& key, | 96 int OpenEntry(const std::string& key, |
| 95 Entry** entry, | 97 Entry** entry, |
| 96 const CompletionCallback& callback) override; | 98 const CompletionCallback& callback) override; |
| 97 int CreateEntry(const std::string& key, | 99 int CreateEntry(const std::string& key, |
| 98 Entry** entry, | 100 Entry** entry, |
| 99 const CompletionCallback& callback) override; | 101 const CompletionCallback& callback) override; |
| 100 int DoomEntry(const std::string& key, | 102 int DoomEntry(const std::string& key, |
| 101 const CompletionCallback& callback) override; | 103 const CompletionCallback& callback) override; |
| 102 int DoomAllEntries(const CompletionCallback& callback) override; | 104 int DoomAllEntries(const CompletionCallback& callback) override; |
| 103 int DoomEntriesBetween(base::Time initial_time, | 105 int DoomEntriesBetween(base::Time initial_time, |
| 104 base::Time end_time, | 106 base::Time end_time, |
| 105 const CompletionCallback& callback) override; | 107 const CompletionCallback& callback) override; |
| 106 int DoomEntriesSince(base::Time initial_time, | 108 int DoomEntriesSince(base::Time initial_time, |
| 107 const CompletionCallback& callback) override; | 109 const CompletionCallback& callback) override; |
| 108 int CalculateSizeOfAllEntries(const CompletionCallback& callback) override; | 110 int CalculateSizeOfAllEntries(const CompletionCallback& callback) override; |
| 109 scoped_ptr<Iterator> CreateIterator() override; | 111 scoped_ptr<Iterator> CreateIterator() override; |
| 110 void GetStats(base::StringPairs* stats) override; | 112 void GetStats(base::StringPairs* stats) override; |
| 111 void OnExternalCacheHit(const std::string& key) override; | 113 void OnExternalCacheHit(const std::string& key) override; |
| 112 | 114 |
| 113 private: | 115 private: |
| 114 class SimpleIterator; | 116 class SimpleIterator; |
| 115 friend class SimpleIterator; | 117 friend class SimpleIterator; |
| 116 | 118 |
| 117 typedef base::hash_map<uint64, SimpleEntryImpl*> EntryMap; | 119 typedef base::hash_map<uint64_t, SimpleEntryImpl*> EntryMap; |
| 118 | 120 |
| 119 typedef base::Callback<void(base::Time mtime, uint64 max_size, int result)> | 121 typedef base::Callback<void(base::Time mtime, uint64_t max_size, int result)> |
| 120 InitializeIndexCallback; | 122 InitializeIndexCallback; |
| 121 | 123 |
| 122 class ActiveEntryProxy; | 124 class ActiveEntryProxy; |
| 123 friend class ActiveEntryProxy; | 125 friend class ActiveEntryProxy; |
| 124 | 126 |
| 125 // Return value of InitCacheStructureOnDisk(). | 127 // Return value of InitCacheStructureOnDisk(). |
| 126 struct DiskStatResult { | 128 struct DiskStatResult { |
| 127 base::Time cache_dir_mtime; | 129 base::Time cache_dir_mtime; |
| 128 uint64 max_size; | 130 uint64_t max_size; |
| 129 bool detected_magic_number_mismatch; | 131 bool detected_magic_number_mismatch; |
| 130 int net_error; | 132 int net_error; |
| 131 }; | 133 }; |
| 132 | 134 |
| 133 void InitializeIndex(const CompletionCallback& callback, | 135 void InitializeIndex(const CompletionCallback& callback, |
| 134 const DiskStatResult& result); | 136 const DiskStatResult& result); |
| 135 | 137 |
| 136 // Dooms all entries previously accessed between |initial_time| and | 138 // Dooms all entries previously accessed between |initial_time| and |
| 137 // |end_time|. Invoked when the index is ready. | 139 // |end_time|. Invoked when the index is ready. |
| 138 void IndexReadyForDoom(base::Time initial_time, | 140 void IndexReadyForDoom(base::Time initial_time, |
| 139 base::Time end_time, | 141 base::Time end_time, |
| 140 const CompletionCallback& callback, | 142 const CompletionCallback& callback, |
| 141 int result); | 143 int result); |
| 142 | 144 |
| 143 // Calculates the size of the entire cache. Invoked when the index is ready. | 145 // Calculates the size of the entire cache. Invoked when the index is ready. |
| 144 void IndexReadyForSizeCalculation(const CompletionCallback& callback, | 146 void IndexReadyForSizeCalculation(const CompletionCallback& callback, |
| 145 int result); | 147 int result); |
| 146 | 148 |
| 147 // Try to create the directory if it doesn't exist. This must run on the IO | 149 // Try to create the directory if it doesn't exist. This must run on the IO |
| 148 // thread. | 150 // thread. |
| 149 static DiskStatResult InitCacheStructureOnDisk(const base::FilePath& path, | 151 static DiskStatResult InitCacheStructureOnDisk(const base::FilePath& path, |
| 150 uint64 suggested_max_size); | 152 uint64_t suggested_max_size); |
| 151 | 153 |
| 152 // Searches |active_entries_| for the entry corresponding to |key|. If found, | 154 // Searches |active_entries_| for the entry corresponding to |key|. If found, |
| 153 // returns the found entry. Otherwise, creates a new entry and returns that. | 155 // returns the found entry. Otherwise, creates a new entry and returns that. |
| 154 scoped_refptr<SimpleEntryImpl> CreateOrFindActiveEntry( | 156 scoped_refptr<SimpleEntryImpl> CreateOrFindActiveEntry( |
| 155 uint64 entry_hash, | 157 uint64_t entry_hash, |
| 156 const std::string& key); | 158 const std::string& key); |
| 157 | 159 |
| 158 // Given a hash, will try to open the corresponding Entry. If we have an Entry | 160 // Given a hash, will try to open the corresponding Entry. If we have an Entry |
| 159 // corresponding to |hash| in the map of active entries, opens it. Otherwise, | 161 // corresponding to |hash| in the map of active entries, opens it. Otherwise, |
| 160 // a new empty Entry will be created, opened and filled with information from | 162 // a new empty Entry will be created, opened and filled with information from |
| 161 // the disk. | 163 // the disk. |
| 162 int OpenEntryFromHash(uint64 entry_hash, | 164 int OpenEntryFromHash(uint64_t entry_hash, |
| 163 Entry** entry, | 165 Entry** entry, |
| 164 const CompletionCallback& callback); | 166 const CompletionCallback& callback); |
| 165 | 167 |
| 166 // Doom the entry corresponding to |entry_hash|, if it's active or currently | 168 // Doom the entry corresponding to |entry_hash|, if it's active or currently |
| 167 // pending doom. This function does not block if there is an active entry, | 169 // pending doom. This function does not block if there is an active entry, |
| 168 // which is very important to prevent races in DoomEntries() above. | 170 // which is very important to prevent races in DoomEntries() above. |
| 169 int DoomEntryFromHash(uint64 entry_hash, const CompletionCallback & callback); | 171 int DoomEntryFromHash(uint64_t entry_hash, |
| 172 const CompletionCallback& callback); |
| 170 | 173 |
| 171 // Called when we tried to open an entry with hash alone. When a blank entry | 174 // Called when we tried to open an entry with hash alone. When a blank entry |
| 172 // has been created and filled in with information from the disk - based on a | 175 // has been created and filled in with information from the disk - based on a |
| 173 // hash alone - this checks that a duplicate active entry was not created | 176 // hash alone - this checks that a duplicate active entry was not created |
| 174 // using a key in the meantime. | 177 // using a key in the meantime. |
| 175 void OnEntryOpenedFromHash(uint64 hash, | 178 void OnEntryOpenedFromHash(uint64_t hash, |
| 176 Entry** entry, | 179 Entry** entry, |
| 177 const scoped_refptr<SimpleEntryImpl>& simple_entry, | 180 const scoped_refptr<SimpleEntryImpl>& simple_entry, |
| 178 const CompletionCallback& callback, | 181 const CompletionCallback& callback, |
| 179 int error_code); | 182 int error_code); |
| 180 | 183 |
| 181 // Called when we tried to open an entry from key. When the entry has been | 184 // Called when we tried to open an entry from key. When the entry has been |
| 182 // opened, a check for key mismatch is performed. | 185 // opened, a check for key mismatch is performed. |
| 183 void OnEntryOpenedFromKey(const std::string key, | 186 void OnEntryOpenedFromKey(const std::string key, |
| 184 Entry** entry, | 187 Entry** entry, |
| 185 const scoped_refptr<SimpleEntryImpl>& simple_entry, | 188 const scoped_refptr<SimpleEntryImpl>& simple_entry, |
| 186 const CompletionCallback& callback, | 189 const CompletionCallback& callback, |
| 187 int error_code); | 190 int error_code); |
| 188 | 191 |
| 189 // A callback thunk used by DoomEntries to clear the |entries_pending_doom_| | 192 // A callback thunk used by DoomEntries to clear the |entries_pending_doom_| |
| 190 // after a mass doom. | 193 // after a mass doom. |
| 191 void DoomEntriesComplete(scoped_ptr<std::vector<uint64> > entry_hashes, | 194 void DoomEntriesComplete(scoped_ptr<std::vector<uint64_t>> entry_hashes, |
| 192 const CompletionCallback& callback, | 195 const CompletionCallback& callback, |
| 193 int result); | 196 int result); |
| 194 | 197 |
| 195 const base::FilePath path_; | 198 const base::FilePath path_; |
| 196 const net::CacheType cache_type_; | 199 const net::CacheType cache_type_; |
| 197 scoped_ptr<SimpleIndex> index_; | 200 scoped_ptr<SimpleIndex> index_; |
| 198 const scoped_refptr<base::SingleThreadTaskRunner> cache_thread_; | 201 const scoped_refptr<base::SingleThreadTaskRunner> cache_thread_; |
| 199 scoped_refptr<base::TaskRunner> worker_pool_; | 202 scoped_refptr<base::TaskRunner> worker_pool_; |
| 200 | 203 |
| 201 int orig_max_size_; | 204 int orig_max_size_; |
| 202 const SimpleEntryImpl::OperationsMode entry_operations_mode_; | 205 const SimpleEntryImpl::OperationsMode entry_operations_mode_; |
| 203 | 206 |
| 204 EntryMap active_entries_; | 207 EntryMap active_entries_; |
| 205 | 208 |
| 206 // The set of all entries which are currently being doomed. To avoid races, | 209 // The set of all entries which are currently being doomed. To avoid races, |
| 207 // these entries cannot have Doom/Create/Open operations run until the doom | 210 // these entries cannot have Doom/Create/Open operations run until the doom |
| 208 // is complete. The base::Closure map target is used to store deferred | 211 // is complete. The base::Closure map target is used to store deferred |
| 209 // operations to be run at the completion of the Doom. | 212 // operations to be run at the completion of the Doom. |
| 210 base::hash_map<uint64, std::vector<base::Closure> > entries_pending_doom_; | 213 base::hash_map<uint64_t, std::vector<base::Closure>> entries_pending_doom_; |
| 211 | 214 |
| 212 net::NetLog* const net_log_; | 215 net::NetLog* const net_log_; |
| 213 }; | 216 }; |
| 214 | 217 |
| 215 } // namespace disk_cache | 218 } // namespace disk_cache |
| 216 | 219 |
| 217 #endif // NET_DISK_CACHE_SIMPLE_SIMPLE_BACKEND_IMPL_H_ | 220 #endif // NET_DISK_CACHE_SIMPLE_SIMPLE_BACKEND_IMPL_H_ |
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