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/*
* 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 Database;
class ScriptExecutionContext;
class SecurityOrigin;
struct SecurityOriginHash;
#if !PLATFORM(CHROMIUM)
class DatabaseTrackerClient;
struct SecurityOriginTraits;
#endif // !PLATFORM(CHROMIUM)
class DatabaseTracker : public Noncopyable {
public:
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.
// no other lock is taken in the code locked on m_openDatabaseMapGuard.
// 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(Database*);
void removeOpenDatabase(Database*);
void getOpenDatabases(SecurityOrigin* origin, const String& name, HashSet<RefPtr<Database> >* databases);
unsigned long long getMaxSizeForDatabase(const Database*);
void databaseChanged(Database*);
private:
DatabaseTracker();
typedef HashSet<Database*> 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
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