diff options
Diffstat (limited to 'getfreq.c')
| -rw-r--r-- | getfreq.c | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/getfreq.c b/getfreq.c new file mode 100644 index 0000000..e94bf8c --- /dev/null +++ b/getfreq.c @@ -0,0 +1,154 @@ +/************************************************************************ + * 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 "common.h" + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <glib.h> + +/* [CORE][FREQUENCY NUMBER] */ +char freqs[999][50][13]; +int total_freqs; + + +/*********************************************************************** + * Initialise surrounding variables, get available freqs etc + **********************************************************************/ +void gf_init() +{ + gchar freq_string[500]; + + int i = 0; + for(i = 0; i < gc_number(); i++) + { + memset(freq_string, '\0', sizeof(freq_string) ); + + // Get available governor freqs. If no governor, try next cpu + if (gf_available(i, freq_string, sizeof(freq_string) ) == -1) + { + debug("Couldn't find gov on core %d\n",i); + continue; + } + + // freq_string is a space separated list of freqs so + // iterate over each frequency in freq_string + gchar* curr = &freq_string[0]; + gchar* end_of_curr = g_strstr_len(curr, strlen(curr), " "); + while(end_of_curr) + { + // TO DO : get rid of magic constants + memset(freqs[i][total_freqs], '\0', 13); // TO DO: get rid of magic constant 13 + memmove(freqs[i][total_freqs], curr, end_of_curr - curr); + + curr = end_of_curr+1; + end_of_curr = g_strstr_len(curr, strlen(curr), " "); + total_freqs++; + } + } + debug("Found %d frequencies\n",total_freqs); +} + +/*********************************************************************** + * Return current frequency for core + **********************************************************************/ +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; +} + + +/*********************************************************************** + * Populate out with available frequencies for core + **********************************************************************/ +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; +} + +/*********************************************************************** + * Populate out with a formatted, units-added freq label for freq + **********************************************************************/ +void gf_get_frequency_label(int freq, char* out) +{ + if(freq >= 1000000) // >= 1 million KHz (1GHz) + sprintf(out, "%.2f GHz", ((float)freq/1000000) ); + else + sprintf(out, "%.2d MHz", freq/1000); + + debug("Prepared freq label '%s' for freq %d\n",out,freq); +} + +/*********************************************************************** + * Return freq value at index for core, as a string + **********************************************************************/ +char* gf_freqa(int core, int index) +{ + return freqs[core][index]; +} + +/*********************************************************************** + * Return freq value at index for core, as an int + **********************************************************************/ +int gf_freqi(int core, int index) +{ + return atoi(gf_freqa(core, index)); +} + +/*********************************************************************** + * Return total number of frequencies + **********************************************************************/ +int gf_number() +{ + return total_freqs; +} |