wxCpuThrottle/src/acpiparser.cpp

/***************************************************************************
 *   Copyright (C) 2007 by Torben Nielsen   *
 *   torben@t-hoerup.dk   *
 *                                                                         *
 *   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 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 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.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/
#include "acpiparser.h"

#include <iostream>
#include <fstream>
#include <sstream>
#include <stdexcept>
#include <stdlib.h>

AcpiParser::AcpiParser()
{
        mNumstates = 0;
        mCurrentState = 0;
}


AcpiParser::~AcpiParser()
{
}

void AcpiParser::ReadAcpiFile()
{
        char buffer[1024];
        std::ifstream in;
        
        in.open("/proc/acpi/processor/CPU0/throttling");
        if  (!in)
                throw std::runtime_error("Could not open file");
        
        int linecounter = 0;
        mStateDescriptions.clear();
        
        while (! in.eof() )
        {
                in.getline(buffer,1024);
                std::string line(buffer);
                linecounter++;
                
                unsigned int pos = line.rfind(' ');
                if (pos == std::string::npos)
                        continue;
                pos++;
                
                std::string value = line.substr(pos, line.size() - pos);
                //std::cout << "Value: (" << linecounter << ") = " << value << std::endl;
                
                switch (linecounter)
                {
                        case 1:
                                mNumstates = atoi(value.c_str());
                                break;
                        case 2:
                        {
                                std::string tmp = value.substr(1, value.size() -1);
                                mCurrentState = atoi(tmp.c_str() );
                                //std::cout << "tmp: >" << tmp << "< = " << std::endl;
                                break;
                        }
                        case 3:
                                break;
                        default:
                                mStateDescriptions.push_back( value );                          
                }
        }
        
        in.close();
        //std::cout << "Current state:" << mCurrentState <<std::endl;
        //std::cout << "Numstates:" << mNumstates << std::endl;
}


int AcpiParser::GetCurrentState()
{
    return mCurrentState;
}


int AcpiParser::GetStateCount()
{
    return mNumstates;
}


std::string AcpiParser::GetStateDescription(unsigned int stateNumber)
{
        if (stateNumber >= mStateDescriptions.size() )
                return "";
        
        return mStateDescriptions[stateNumber];
}


void AcpiParser::SetState(int newState)
{
        if (newState > mNumstates)
                throw std::invalid_argument("newState too small");
        
        std::ofstream out;
        out.open("/proc/acpi/processor/CPU0/throttling");
        
        if (!out)
                throw std::runtime_error("Could not open file");
        

        std::stringstream buf;
        buf << newState << "\n";
        out << buf.str();
        out.close();
}
1	torben	24	/***************************************************************************
2			* Copyright (C) 2007 by Torben Nielsen *
3			* torben@t-hoerup.dk *
4			* *
5			* This program is free software; you can redistribute it and/or modify *
6			* it under the terms of the GNU General Public License as published by *
7			* the Free Software Foundation; either version 2 of the License, or *
8			* (at your option) any later version. *
9			* *
10			* This program is distributed in the hope that it will be useful, *
11			* but WITHOUT ANY WARRANTY; without even the implied warranty of *
12			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
13			* GNU General Public License for more details. *
14			* *
15			* You should have received a copy of the GNU General Public License *
16			* along with this program; if not, write to the *
17			* Free Software Foundation, Inc., *
18			* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
19			***************************************************************************/
20			#include "acpiparser.h"
21
22			#include <iostream>
23			#include <fstream>
24			#include <sstream>
25	torben	25	#include <stdexcept>
26	torben	221	#include <stdlib.h>
27	torben	24
28			AcpiParser::AcpiParser()
29			{
30			mNumstates = 0;
31			mCurrentState = 0;
32			}
33
34
35			AcpiParser::~AcpiParser()
36			{
37			}
38
39			void AcpiParser::ReadAcpiFile()
40			{
41			char buffer[1024];
42			std::ifstream in;
43
44	torben	326	in.open("/proc/acpi/processor/CPU0/throttling");
45	torben	25	if (!in)
46			throw std::runtime_error("Could not open file");
47
48	torben	24	int linecounter = 0;
49	torben	25	mStateDescriptions.clear();
50
51	torben	24	while (! in.eof() )
52			{
53			in.getline(buffer,1024);
54			std::string line(buffer);
55			linecounter++;
56
57			unsigned int pos = line.rfind(' ');
58			if (pos == std::string::npos)
59			continue;
60	torben	25	pos++;
61	torben	24
62			std::string value = line.substr(pos, line.size() - pos);
63	torben	25	//std::cout << "Value: (" << linecounter << ") = " << value << std::endl;
64	torben	24
65			switch (linecounter)
66			{
67			case 1:
68			mNumstates = atoi(value.c_str());
69			break;
70			case 2:
71			{
72			std::string tmp = value.substr(1, value.size() -1);
73			mCurrentState = atoi(tmp.c_str() );
74	torben	25	//std::cout << "tmp: >" << tmp << "< = " << std::endl;
75	torben	24	break;
76			}
77	torben	221	case 3:
78			break;
79	torben	24	default:
80			mStateDescriptions.push_back( value );
81			}
82			}
83
84			in.close();
85	torben	25	//std::cout << "Current state:" << mCurrentState <<std::endl;
86			//std::cout << "Numstates:" << mNumstates << std::endl;
87	torben	24	}
88
89
90			int AcpiParser::GetCurrentState()
91			{
92			return mCurrentState;
93			}
94
95
96
97			int AcpiParser::GetStateCount()
98			{
99			return mNumstates;
100			}
101
102
103			std::string AcpiParser::GetStateDescription(unsigned int stateNumber)
104			{
105			if (stateNumber >= mStateDescriptions.size() )
106			return "";
107
108			return mStateDescriptions[stateNumber];
109			}
110
111
112
113	torben	25	void AcpiParser::SetState(int newState)
114	torben	24	{
115			if (newState > mNumstates)
116	torben	25	throw std::invalid_argument("newState too small");
117	torben	24
118			std::ofstream out;
119	torben	326	out.open("/proc/acpi/processor/CPU0/throttling");
120	torben	24
121	torben	25	if (!out)
122			throw std::runtime_error("Could not open file");
123	torben	24
124	torben	25
125			std::stringstream buf;
126			buf << newState << "\n";
127			out << buf.str();
128			out.close();
129	torben	24	}