108 lines
3.5 KiB
C++
108 lines
3.5 KiB
C++
/*
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* Copyright (C) 2008, 2009, 2010 Apple Inc. All Rights Reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <WebCore/SQLiteDatabase.h>
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#include <WebCore/Timer.h>
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#include <wtf/Condition.h>
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#include <wtf/HashMap.h>
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#include <wtf/Lock.h>
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#include <wtf/text/StringHash.h>
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namespace WebCore {
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class StorageSyncManager;
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}
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namespace WebKit {
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class StorageAreaImpl;
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class StorageAreaSync : public ThreadSafeRefCounted<StorageAreaSync, WTF::DestructionThread::Main> {
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public:
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static Ref<StorageAreaSync> create(RefPtr<WebCore::StorageSyncManager>&&, Ref<StorageAreaImpl>&&, const String& databaseIdentifier);
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~StorageAreaSync();
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void scheduleFinalSync();
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void blockUntilImportComplete();
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void scheduleItemForSync(const String& key, const String& value);
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void scheduleClear();
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void scheduleCloseDatabase();
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void scheduleSync();
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private:
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StorageAreaSync(RefPtr<WebCore::StorageSyncManager>&&, Ref<StorageAreaImpl>&&, const String& databaseIdentifier);
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WebCore::Timer m_syncTimer;
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HashMap<String, String> m_changedItems;
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bool m_itemsCleared;
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bool m_finalSyncScheduled;
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RefPtr<StorageAreaImpl> m_storageArea;
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RefPtr<WebCore::StorageSyncManager> m_syncManager;
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// The database handle will only ever be opened and used on the background thread.
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WebCore::SQLiteDatabase m_database;
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// The following members are subject to thread synchronization issues.
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public:
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// Called from the background thread
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void performImport();
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void performSync();
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void deleteEmptyDatabase();
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private:
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enum OpenDatabaseParamType {
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CreateIfNonExistent,
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SkipIfNonExistent
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};
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void syncTimerFired();
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void openDatabase(OpenDatabaseParamType openingStrategy);
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void sync(bool clearItems, const HashMap<String, String>& items);
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const String m_databaseIdentifier;
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Lock m_syncLock;
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HashMap<String, String> m_itemsPendingSync;
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bool m_clearItemsWhileSyncing;
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bool m_syncScheduled;
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bool m_syncInProgress;
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bool m_databaseOpenFailed;
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bool m_syncCloseDatabase;
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mutable Lock m_importLock;
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Condition m_importCondition;
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bool m_importComplete WTF_GUARDED_BY_LOCK(m_importLock);
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void markImported();
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void migrateItemTableIfNeeded();
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};
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} // namespace WebCore
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