StorageBooker.h

/*
 * This file is part of buteo-syncfw package
 *
 * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
 *
 * Contact: Sateesh Kavuri <sateesh.kavuri@nokia.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * version 2.1 as published by the Free Software Foundation.
 *
 * This library is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 *
 */
#ifndef STORAGEBOOKER_H
#define STORAGEBOOKER_H
 
#include <QString>
#include <QStringList>
#include <QMap>
#include <QMutex>
 
namespace Buteo {

class StorageBooker
{
public:
    StorageBooker();

    ~StorageBooker();

    bool reserveStorage(const QString &aStorageName,
                        const QString &aClientId = "");

    bool reserveStorages(const QStringList &aStorageNames,
                         const QString &aClientId = "");

    unsigned releaseStorage(const QString &aStorageName);

    void releaseStorages(const QStringList &aStorageNames);

    bool isStorageAvailable(const QString &aStorageName,
                            const QString &aClientId = "") const;

    bool storagesAvailable(const QStringList &aStorageNames,
                           const QString &aClientId = "") const;
 
private:
    struct StorageMapItem {
        QString iClientId;
        unsigned iRefCount;
 
        StorageMapItem()
            : iRefCount(0)
        {}
 
        StorageMapItem(const QString &aClientId)
            : iClientId(aClientId)
            , iRefCount(1)
        {}
    };
 
    QMap<QString, StorageMapItem> iStorageMap;
    mutable QMutex iMutex;
};
 
}
 
#endif // STORAGEBOOKER_H