cpufreq_management.h

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/***************************************************************************
 *                                                                         *
 *                         Powersave Daemon                                *
 *                                                                         *
 *          Copyright (C) 2004,2005,2006 SUSE Linux Products GmbH          *
 *                                                                         *
 *               Author(s): Holger Macht <hmacht@suse.de>                  *
 *                                                                         *
 * This program is free software; you can redistribute it and/or modify it *
 * under the terms of the GNU General Public License as published by the   *
 * Free Software Foundation; either version 2 of the License, or (at you   *
 * 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       *
 * General Public License for more details.                                *
 *                                                                         *
 * You should have received a copy of the GNU General Public License along *
 * with this program; if not, write to the Free Software Foundation, Inc., *
 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA                  *
 *                                                                         *
 ***************************************************************************/

#ifndef CPUFREQ_MANAGEMENT_H
#define CPUFREQ_MANAGEMENT_H

#include <list>
#include "cpufreq_interface.h"

class CpufreqManagement {
public:
        CpufreqManagement();

        ~CpufreqManagement();

        void init();

        bool isSupported();

        void adjustSpeeds();

        int setModes(CPUFREQ_MODE mode, EventManagement *eM);

        CPUFREQ_MODE getMode();

        void reinitSpeeds();

        void rereadFrequencies();

        int setGovernors(const string &new_governor);

        void setConfigs();

        CPUFREQ_CONTROL_MODE controlMode();

        int enableCPU(int cpu);

        int disableCPU(int cpu);
        
        bool hasControlMode(CPUFREQ_CONTROL_MODE control_mode);

#ifdef CPUFREQ_MEASURE

        void startMeasures();
        void stopMeasures();
#endif

private:
        bool initSingleInterface(std::list< int > &cores, CPUFREQ_CONTROL_MODE control_mode);

        bool getCoresAffectedCpus(std::list< std::list< int> > &cpu_list, int num_cpus);
        
        bool getCoresProcfile(list< list< int > > & cpu_list, int num_cpus);

        bool readCpu(std::list< int > & core_list, int cpu);

        bool siblingExists(list< int > core_list, int core);

        void checkCPUHotplug();

        std::list< CPUFreq_Interface* > _cpufreq_objects;

        std::list< std::list< int > > _cpus;

        int _control_modes;

        CPUFREQ_CONTROL_MODE _initial_control_mode;

        int _initial_cpu_count;
};


#endif // CPUFREQ_MANAGEMENT_H

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