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	/***************************************************************************
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	#include <stdexcept>
26	#include <stdlib.h>
27
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	in.open("/proc/acpi/processor/CPU0/throttling");
45	if (!in)
46	throw std::runtime_error("Could not open file");
47
48	int linecounter = 0;
49	mStateDescriptions.clear();
50
51	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	pos++;
61
62	std::string value = line.substr(pos, line.size() - pos);
63	//std::cout << "Value: (" << linecounter << ") = " << value << std::endl;
64
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	//std::cout << "tmp: >" << tmp << "< = " << std::endl;
75	break;
76	}
77	case 3:
78	break;
79	default:
80	mStateDescriptions.push_back( value );
81	}
82	}
83
84	in.close();
85	//std::cout << "Current state:" << mCurrentState <<std::endl;
86	//std::cout << "Numstates:" << mNumstates << std::endl;
87	}
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	void AcpiParser::SetState(int newState)
114	{
115	if (newState > mNumstates)
116	throw std::invalid_argument("newState too small");
117
118	std::ofstream out;
119	out.open("/proc/acpi/processor/CPU0/throttling");
120
121	if (!out)
122	throw std::runtime_error("Could not open file");
123
124
125	std::stringstream buf;
126	buf << newState << "\n";
127	out << buf.str();
128	out.close();
129	}