xref: /external/webkit/Source/WebCore/storage/chromium/QuotaTracker.h

/*
 * Copyright (C) 2009 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:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * 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.
 *     * Neither the name of Google Inc. 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 THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
 * OWNER 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
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef QuotaTracker_h
#define QuotaTracker_h

#if ENABLE(DATABASE)

#include "PlatformString.h"
#include "SecurityOrigin.h"
#include <wtf/HashMap.h>
#include <wtf/text/StringHash.h>

namespace WebCore {

class QuotaTracker {
public:
    static QuotaTracker& instance();

    void getDatabaseSizeAndSpaceAvailableToOrigin(
        const String& originIdentifier, const String& databaseName,
        unsigned long long* databaseSize, unsigned long long* spaceAvailable);
    void updateDatabaseSizeAndSpaceAvailableToOrigin(
        const String& originIdentifier, const String& databaseName,
        unsigned long long databaseSize, unsigned long long spaceAvailable);

private:
    QuotaTracker() { }

    typedef HashMap<String, unsigned long long> SizeMap;
    SizeMap m_spaceAvailableToOrigins;
    HashMap<String, SizeMap> m_databaseSizes;
    Mutex m_dataGuard;
};

}

#endif // ENABLE(DATABASE)

#endif // QuotaTracker_h