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/*
* Copyright (C) 2008 Apple Inc. All Rights Reserved.
* Copyright (C) 2011 Google, 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 COMPUTER, 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 COMPUTER, 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 DatabaseContext_h
#define DatabaseContext_h
#include "core/dom/ActiveDOMObject.h"
#include "core/workers/WorkerGlobalScope.h"
#include "platform/heap/Handle.h"
#include "wtf/PassRefPtr.h"
#include "wtf/ThreadSafeRefCounted.h"
namespace WebCore {
class Database;
class DatabaseBackendBase;
class DatabaseContext;
class TaskSynchronizer;
class DatabaseThread;
class ExecutionContext;
class SecurityOrigin;
class DatabaseContext FINAL
: public ThreadSafeRefCountedWillBeGarbageCollectedFinalized<DatabaseContext>
, public ActiveDOMObject
, private WorkerGlobalScope::TerminationObserver {
public:
friend class DatabaseManager;
static PassRefPtrWillBeRawPtr<DatabaseContext> create(ExecutionContext*);
virtual ~DatabaseContext();
void trace(Visitor*);
// For life-cycle management (inherited from ActiveDOMObject):
virtual void contextDestroyed() OVERRIDE;
virtual void stop() OVERRIDE;
DatabaseContext* backend();
DatabaseThread* databaseThread();
void setHasOpenDatabases() { m_hasOpenDatabases = true; }
void didOpenDatabase(DatabaseBackendBase&);
void didCloseDatabase(DatabaseBackendBase&);
// Blocks the caller thread until cleanup tasks are completed.
void stopDatabases();
bool allowDatabaseAccess() const;
SecurityOrigin* securityOrigin() const;
bool isContextThread() const;
private:
explicit DatabaseContext(ExecutionContext*);
virtual void wasRequestedToTerminate() OVERRIDE;
void stopSyncDatabases();
RefPtrWillBeMember<DatabaseThread> m_databaseThread;
#if ENABLE(OILPAN)
class DatabaseCloser {
public:
explicit DatabaseCloser(DatabaseBackendBase& database) : m_database(database) { }
~DatabaseCloser();
private:
DatabaseBackendBase& m_database;
};
HeapHashMap<WeakMember<DatabaseBackendBase>, OwnPtr<DatabaseCloser> > m_openSyncDatabases;
#else
// The contents of m_openSyncDatabases are raw pointers. It's safe because
// DatabaseBackendSync is always closed before destruction.
HashSet<DatabaseBackendBase*> m_openSyncDatabases;
#endif
bool m_hasOpenDatabases; // This never changes back to false, even after the database thread is closed.
bool m_hasRequestedTermination;
};
} // namespace WebCore
#endif // DatabaseContext_h
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