Merge WebKit at r75315: Initial merge by git.

Change-Id: I570314b346ce101c935ed22a626b48c2af266b84

1 files changed, 106 insertions, 0 deletions

diff --git a/Source/WebCore/storage/StorageAreaSync.h b/Source/WebCore/storage/StorageAreaSync.h
new file mode 100644
index 0000000..90aa6a7
--- /dev/null
+++ b/Source/WebCore/storage/StorageAreaSync.h
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+/*
+ * Copyright (C) 2008, 2009, 2010 Apple Inc. All Rights Reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef StorageAreaSync_h
+#define StorageAreaSync_h
+
+#if ENABLE(DOM_STORAGE)
+
+#include "SQLiteDatabase.h"
+#include "Timer.h"
+#include <wtf/HashMap.h>
+#include <wtf/text/StringHash.h>
+
+namespace WebCore {
+
+    class Frame;
+    class StorageAreaImpl;
+    class StorageSyncManager;
+
+    class StorageAreaSync : public RefCounted<StorageAreaSync> {
+    public:
+        static PassRefPtr<StorageAreaSync> create(PassRefPtr<StorageSyncManager>, PassRefPtr<StorageAreaImpl>, const String& databaseIdentifier);
+        ~StorageAreaSync();
+
+        void scheduleFinalSync();
+        void blockUntilImportComplete();
+
+        void scheduleItemForSync(const String& key, const String& value);
+        void scheduleClear();
+
+    private:
+        StorageAreaSync(PassRefPtr<StorageSyncManager>, PassRefPtr<StorageAreaImpl>, const String& databaseIdentifier);
+
+        void dispatchStorageEvent(const String& key, const String& oldValue, const String& newValue, Frame* sourceFrame);
+
+        Timer<StorageAreaSync> m_syncTimer;
+        HashMap<String, String> m_changedItems;
+        bool m_itemsCleared;
+
+        bool m_finalSyncScheduled;
+
+        RefPtr<StorageAreaImpl> m_storageArea;
+        RefPtr<StorageSyncManager> m_syncManager;
+
+        // The database handle will only ever be opened and used on the background thread.
+        SQLiteDatabase m_database;
+
+    // The following members are subject to thread synchronization issues.
+    public:
+        // Called from the background thread
+        void performImport();
+        void performSync();
+        void deleteEmptyDatabase();
+
+    private:
+        enum OpenDatabaseParamType {
+          CreateIfNonExistent,
+          SkipIfNonExistent
+        };
+
+        void syncTimerFired(Timer<StorageAreaSync>*);
+        void openDatabase(OpenDatabaseParamType openingStrategy);
+        void sync(bool clearItems, const HashMap<String, String>& items);
+
+        const String m_databaseIdentifier;
+
+        Mutex m_syncLock;
+        HashMap<String, String> m_itemsPendingSync;
+        bool m_clearItemsWhileSyncing;
+        bool m_syncScheduled;
+        bool m_syncInProgress;
+        bool m_databaseOpenFailed;
+
+        mutable Mutex m_importLock;
+        mutable ThreadCondition m_importCondition;
+        mutable bool m_importComplete;
+        void markImported();
+    };
+
+} // namespace WebCore
+
+#endif // ENABLE(DOM_STORAGE)
+
+#endif // StorageAreaSync_h