--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/storage/DatabaseTracker.h Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,177 @@
+/*
+ * Copyright (C) 2007, 2008 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.
+ * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
+ * its contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "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 OR ITS 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 DatabaseTracker_h
+#define DatabaseTracker_h
+
+#if ENABLE(DATABASE)
+
+#include "PlatformString.h"
+#include "StringHash.h"
+#include <wtf/HashMap.h>
+#include <wtf/HashSet.h>
+
+#if !PLATFORM(CHROMIUM)
+#include "DatabaseDetails.h"
+#include "SQLiteDatabase.h"
+#include <wtf/OwnPtr.h>
+#endif // !PLATFORM(CHROMIUM)
+
+namespace WebCore {
+
+class AbstractDatabase;
+class ScriptExecutionContext;
+class SecurityOrigin;
+
+struct SecurityOriginHash;
+
+#if !PLATFORM(CHROMIUM)
+class DatabaseTrackerClient;
+
+struct SecurityOriginTraits;
+#endif // !PLATFORM(CHROMIUM)
+
+class DatabaseTracker : public Noncopyable {
+public:
+ static void initializeTracker(const String& databasePath);
+ static DatabaseTracker& tracker();
+ // This singleton will potentially be used from multiple worker threads and the page's context thread simultaneously. To keep this safe, it's
+ // currently using 4 locks. In order to avoid deadlock when taking multiple locks, you must take them in the correct order:
+ // m_databaseGuard before quotaManager if both locks are needed.
+ // m_openDatabaseMapGuard before quotaManager if both locks are needed.
+ // m_databaseGuard and m_openDatabaseMapGuard currently don't overlap.
+ // notificationMutex() is currently independent of the other locks.
+
+ bool canEstablishDatabase(ScriptExecutionContext*, const String& name, const String& displayName, unsigned long estimatedSize);
+ void setDatabaseDetails(SecurityOrigin*, const String& name, const String& displayName, unsigned long estimatedSize);
+ String fullPathForDatabase(SecurityOrigin*, const String& name, bool createIfDoesNotExist = true);
+
+ void addOpenDatabase(AbstractDatabase*);
+ void removeOpenDatabase(AbstractDatabase*);
+ void getOpenDatabases(SecurityOrigin* origin, const String& name, HashSet<RefPtr<AbstractDatabase> >* databases);
+
+ unsigned long long getMaxSizeForDatabase(const AbstractDatabase*);
+ void databaseChanged(AbstractDatabase*);
+
+private:
+ DatabaseTracker(const String& databasePath);
+
+ typedef HashSet<AbstractDatabase*> DatabaseSet;
+ typedef HashMap<String, DatabaseSet*> DatabaseNameMap;
+ typedef HashMap<RefPtr<SecurityOrigin>, DatabaseNameMap*, SecurityOriginHash> DatabaseOriginMap;
+
+ Mutex m_openDatabaseMapGuard;
+ mutable OwnPtr<DatabaseOriginMap> m_openDatabaseMap;
+
+#if !PLATFORM(CHROMIUM)
+public:
+ void setDatabaseDirectoryPath(const String&);
+ String databaseDirectoryPath() const;
+
+ void origins(Vector<RefPtr<SecurityOrigin> >& result);
+ bool databaseNamesForOrigin(SecurityOrigin*, Vector<String>& result);
+
+ DatabaseDetails detailsForNameAndOrigin(const String&, SecurityOrigin*);
+
+ unsigned long long usageForDatabase(const String&, SecurityOrigin*);
+ unsigned long long usageForOrigin(SecurityOrigin*);
+ unsigned long long quotaForOrigin(SecurityOrigin*);
+ void setQuota(SecurityOrigin*, unsigned long long);
+
+ void deleteAllDatabases();
+ bool deleteOrigin(SecurityOrigin*);
+ bool deleteDatabase(SecurityOrigin*, const String& name);
+
+ void setClient(DatabaseTrackerClient*);
+
+ // From a secondary thread, must be thread safe with its data
+ void scheduleNotifyDatabaseChanged(SecurityOrigin*, const String& name);
+
+ bool hasEntryForOrigin(SecurityOrigin*);
+
+private:
+ bool hasEntryForOriginNoLock(SecurityOrigin* origin);
+ String fullPathForDatabaseNoLock(SecurityOrigin*, const String& name, bool createIfDoesNotExist);
+ bool databaseNamesForOriginNoLock(SecurityOrigin* origin, Vector<String>& resultVector);
+ unsigned long long usageForOriginNoLock(SecurityOrigin* origin);
+ unsigned long long quotaForOriginNoLock(SecurityOrigin* origin);
+
+ String trackerDatabasePath() const;
+ void openTrackerDatabase(bool createIfDoesNotExist);
+
+ String originPath(SecurityOrigin*) const;
+
+ bool hasEntryForDatabase(SecurityOrigin*, const String& databaseIdentifier);
+
+ bool addDatabase(SecurityOrigin*, const String& name, const String& path);
+ void populateOrigins();
+
+ bool deleteDatabaseFile(SecurityOrigin*, const String& name);
+
+ // This lock protects m_database, m_quotaMap, m_proposedDatabases, m_databaseDirectoryPath, m_originsBeingDeleted, m_beingCreated, and m_beingDeleted.
+ Mutex m_databaseGuard;
+ SQLiteDatabase m_database;
+
+ typedef HashMap<RefPtr<SecurityOrigin>, unsigned long long, SecurityOriginHash> QuotaMap;
+ mutable OwnPtr<QuotaMap> m_quotaMap;
+
+ String m_databaseDirectoryPath;
+
+ DatabaseTrackerClient* m_client;
+
+ typedef std::pair<RefPtr<SecurityOrigin>, DatabaseDetails> ProposedDatabase;
+ HashSet<ProposedDatabase*> m_proposedDatabases;
+
+ typedef HashMap<String, long> NameCountMap;
+ typedef HashMap<RefPtr<SecurityOrigin>, NameCountMap*, SecurityOriginHash> CreateSet;
+ CreateSet m_beingCreated;
+ typedef HashSet<String> NameSet;
+ HashMap<RefPtr<SecurityOrigin>, NameSet*, SecurityOriginHash> m_beingDeleted;
+ HashSet<RefPtr<SecurityOrigin>, SecurityOriginHash> m_originsBeingDeleted;
+ bool canCreateDatabase(SecurityOrigin *origin, const String& name);
+ void recordCreatingDatabase(SecurityOrigin *origin, const String& name);
+ void doneCreatingDatabase(SecurityOrigin *origin, const String& name);
+ bool creatingDatabase(SecurityOrigin *origin, const String& name);
+ bool canDeleteDatabase(SecurityOrigin *origin, const String& name);
+ void recordDeletingDatabase(SecurityOrigin *origin, const String& name);
+ void doneDeletingDatabase(SecurityOrigin *origin, const String& name);
+ bool deletingDatabase(SecurityOrigin *origin, const String& name);
+ bool canDeleteOrigin(SecurityOrigin *origin);
+ bool deletingOrigin(SecurityOrigin *origin);
+ void recordDeletingOrigin(SecurityOrigin *origin);
+ void doneDeletingOrigin(SecurityOrigin *origin);
+
+ static void scheduleForNotification();
+ static void notifyDatabasesChanged(void*);
+#endif // !PLATFORM(CHROMIUM)
+};
+
+} // namespace WebCore
+
+#endif // ENABLE(DATABASE)
+#endif // DatabaseTracker_h