Clean-ups

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;
+}