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/*
 * SystemManager.h
 *
 * Copyright (C) 2009 Matthias Schiffer <matthias@gamezock.de>
 *
 * This program is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 program. If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef MAD_COMMON_SYSTEMMANAGER_H_
#define MAD_COMMON_SYSTEMMANAGER_H_

#include "export.h"

#include <set>
#include <string>
#include <vector>

#include <boost/noncopyable.hpp>
#include <boost/smart_ptr.hpp>

#include <Core/Exception.h>

namespace Mad {
namespace Common {

class Application;
class SystemBackend;

class MAD_COMMON_EXPORT SystemManager : private boost::noncopyable {
  private:
    friend class Application;

    struct MAD_COMMON_EXPORT Compare {
      bool operator() (boost::shared_ptr<SystemBackend> b1, boost::shared_ptr<SystemBackend> b2);
    };

    std::set<boost::shared_ptr<SystemBackend>, Compare> backends;

    SystemManager() {}

  public:
    struct FSInfo {
      std::string fsName;
      std::string mountedOn;
      long long total;
      long long used;
      long long available;
    };

    void registerBackend(boost::shared_ptr<SystemBackend> backend) {
      backends.insert(backend);
    }

    void unregisterBackend(boost::shared_ptr<SystemBackend> backend) {
      backends.erase(backend);
    }

    void getUptimeInfo(unsigned long *uptime, unsigned long *idleTime) throw(Core::Exception);
    void getMemoryInfo(unsigned long *totalMem, unsigned long *freeMem, unsigned long *totalSwap, unsigned long *freeSwap) throw(Core::Exception);
    void getLoadInfo(unsigned long *currentLoad, unsigned long *nProcesses, float *loadAvg1, float *loadAvg5, float *loadAvg15) throw(Core::Exception);

    void getFSInfo(std::vector<FSInfo> *fsInfo) throw(Core::Exception);

    void shutdown() throw(Core::Exception);
    void reboot() throw(Core::Exception);
};

}
}

#endif /* MAD_COMMON_SYSTEMMANAGER_H_ */