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/************************************************************************
* This file is part of trayfreq-archlinux. *
* *
* trayfreq-archlinux 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 3 of the *
* License, or (at your option) any later version. *
* *
* trayfreq-archlinux 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 trayfreq-archlinux. If not, see *
* <http://www.gnu.org/licenses/>. *
************************************************************************/
#include "getfreq.h"
#include "getcore.h"
#include "math.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <glib.h>
/* [CORE][FREQUENCY NUMBER] */
char AVAILABLE_FREQUENCIES[999][50][13];
int NUMBER_OF_AVAILABLE_FREQUENCIES;
void gf_init()
{
// TO DO : get rid of magic constants
gchar freq_string[500];
int i = 0;
int j = 0;
for(i = 0; i < gc_number(); ++i)
{
memset(freq_string, '\0', 500);
// Get available governor freqs. If no governor, try next cpu
if (gf_available(i, freq_string, 500) == -1)
{
debug("Couldn't find gov on core %d\n",i);
continue;
}
/* go through every frequency in freq_string */
j = 0;
gchar* curr = &freq_string[0];
gchar* end_of_curr = g_strstr_len(curr, strlen(curr), " ");
while(end_of_curr)
{
memset(AVAILABLE_FREQUENCIES[i][j], '\0', 13);
memmove(AVAILABLE_FREQUENCIES[i][j], curr, end_of_curr - curr);
curr = end_of_curr+1;
end_of_curr = g_strstr_len(curr, strlen(curr), " ");
++j;
}
}
NUMBER_OF_AVAILABLE_FREQUENCIES = j;
debug("Found %d frequencies\n",j);
}
int gf_current(int core)
{
FILE* fd;
char buff[13];
char path[80];
int freq;
sprintf(path, "/sys/devices/system/cpu/cpu%d/cpufreq/scaling_cur_freq", core);
if(!(fd = fopen(path, "r")))
{
debug("Couldn't open '%s'\n",path);
return -1;
}
fgets(buff, 13, fd);
freq = atoi(buff);
fclose(fd);
debug("Found freq %d on core %d\n",freq,core);
return freq;
}
int gf_available(int core, char* out, int size)
{
FILE* fd;
char path[80];
sprintf(path, "/sys/devices/system/cpu/cpu%d/cpufreq/scaling_available_frequencies", core);
if(!(fd = fopen(path, "r")))
{
debug("Couldn't open '%s'\n",path);
return -1;
}
fgets(out, size, fd);
fclose(fd);
return 0;
}
void gf_get_frequency_label(int freq, char* out)
{
int i = 0;
while(freq/pow(10, i) >= 1)
++i;
if(i == 7)
sprintf(out, "%.2f GHz", freq/pow(10, i-1));
else
sprintf(out, "%.2d MHz", freq/1000);
debug("Prepared freq label '%s' for freq %d\n",out,freq);
}
char* gf_freqa(int core, int index)
{
return AVAILABLE_FREQUENCIES[core][index];
}
int gf_freqi(int core, int index)
{
return atoi(gf_freqa(core, index));
}
int gf_number()
{
return NUMBER_OF_AVAILABLE_FREQUENCIES;
}
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