1 /* 2 * Copyright (C) 2008, 2009 Apple Inc. All Rights Reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef StorageAreaSync_h 27 #define StorageAreaSync_h 28 29 #if ENABLE(DOM_STORAGE) 30 31 #include "PlatformString.h" 32 #include "SQLiteDatabase.h" 33 #include "StringHash.h" 34 #include "Timer.h" 35 #include <wtf/HashMap.h> 36 37 namespace WebCore { 38 39 class Frame; 40 class StorageAreaImpl; 41 class StorageSyncManager; 42 43 class StorageAreaSync : public RefCounted<StorageAreaSync> { 44 public: 45 static PassRefPtr<StorageAreaSync> create(PassRefPtr<StorageSyncManager> storageSyncManager, PassRefPtr<StorageAreaImpl> storageArea); 46 ~StorageAreaSync(); 47 48 void scheduleFinalSync(); 49 void blockUntilImportComplete() const; 50 51 void scheduleItemForSync(const String& key, const String& value); 52 void scheduleClear(); 53 54 private: 55 StorageAreaSync(PassRefPtr<StorageSyncManager> storageSyncManager, PassRefPtr<StorageAreaImpl> storageArea); 56 57 void dispatchStorageEvent(const String& key, const String& oldValue, const String& newValue, Frame* sourceFrame); 58 59 Timer<StorageAreaSync> m_syncTimer; 60 HashMap<String, String> m_changedItems; 61 bool m_itemsCleared; 62 63 bool m_finalSyncScheduled; 64 65 RefPtr<StorageAreaImpl> m_storageArea; 66 RefPtr<StorageSyncManager> m_syncManager; 67 68 // The database handle will only ever be opened and used on the background thread. 69 SQLiteDatabase m_database; 70 71 // The following members are subject to thread synchronization issues. 72 public: 73 // Called from the background thread 74 void performImport(); 75 void performSync(); 76 77 private: 78 void syncTimerFired(Timer<StorageAreaSync>*); 79 void sync(bool clearItems, const HashMap<String, String>& items); 80 81 Mutex m_syncLock; 82 HashMap<String, String> m_itemsPendingSync; 83 bool m_clearItemsWhileSyncing; 84 bool m_syncScheduled; 85 86 mutable Mutex m_importLock; 87 mutable ThreadCondition m_importCondition; 88 mutable bool m_importComplete; 89 void markImported(); 90 }; 91 92 } // namespace WebCore 93 94 #endif // ENABLE(DOM_STORAGE) 95 96 #endif // StorageAreaSync_h 97