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/*
* MATE CPUFreq Applet
* Copyright (C) 2004 Carlos Garcia Campos <carlosgc@gnome.org>
*
* This library 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 library 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 library; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
*
* Authors : Carlos Garc�a Campos <carlosgc@gnome.org>
*/
#include <glib.h>
#include <glib/gi18n.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include "cpufreq-monitor-procfs.h"
#include "cpufreq-utils.h"
static gboolean cpufreq_monitor_procfs_run (CPUFreqMonitor *monitor);
static GList *cpufreq_monitor_procfs_get_available_frequencies (CPUFreqMonitor *monitor);
G_DEFINE_TYPE (CPUFreqMonitorProcfs, cpufreq_monitor_procfs, CPUFREQ_TYPE_MONITOR)
static void
cpufreq_monitor_procfs_init (CPUFreqMonitorProcfs *monitor)
{
}
static void
cpufreq_monitor_procfs_class_init (CPUFreqMonitorProcfsClass *klass)
{
CPUFreqMonitorClass *monitor_class = CPUFREQ_MONITOR_CLASS (klass);
monitor_class->run = cpufreq_monitor_procfs_run;
monitor_class->get_available_frequencies = cpufreq_monitor_procfs_get_available_frequencies;
}
CPUFreqMonitor *
cpufreq_monitor_procfs_new (guint cpu)
{
CPUFreqMonitorProcfs *monitor;
monitor = g_object_new (TYPE_CPUFREQ_MONITOR_PROCFS, "cpu", cpu, NULL);
return CPUFREQ_MONITOR (monitor);
}
static gint
cpufreq_monitor_procfs_get_freq_from_userspace (guint cpu)
{
gchar *buffer = NULL;
gchar *path;
gchar *p;
gchar *frequency;
gint freq;
gint len;
GError *error = NULL;
path = g_strdup_printf ("/proc/sys/cpu/%u/speed", cpu);
if (!cpufreq_file_get_contents (path, &buffer, NULL, &error)) {
g_warning ("%s", error->message);
g_error_free (error);
g_free (path);
return -1;
}
g_free (path);
/* Try to remove the '\n' */
p = g_strrstr (buffer, "\n");
len = strlen (buffer);
if (p)
len -= strlen (p);
frequency = g_strndup (buffer, len);
g_free (buffer);
freq = atoi (frequency);
g_free (frequency);
return freq;
}
static gboolean
cpufreq_monitor_procfs_parse (CPUFreqMonitorProcfs *monitor,
gint *cpu,
gint *fmax,
gint *pmin,
gint *pmax,
gint *fmin,
gchar *mode)
{
gchar **lines;
gchar *buffer = NULL;
gint i, count;
guint mon_cpu;
GError *error = NULL;
if (!cpufreq_file_get_contents ("/proc/cpufreq", &buffer, NULL, &error)) {
g_warning ("%s", error->message);
g_error_free (error);
return FALSE;
}
g_object_get (G_OBJECT (monitor),
"cpu", &mon_cpu, NULL);
count = 0;
lines = g_strsplit (buffer, "\n", -1);
for (i = 0; lines[i]; i++) {
if (g_ascii_strncasecmp (lines[i], "CPU", 3) == 0) {
/* CPU 0 650000 kHz ( 81 %) - 800000 kHz (100 %) - powersave */
count = sscanf (lines[i], "CPU %d %d kHz (%d %%) - %d kHz (%d %%) - %20s",
cpu, fmin, pmin, fmax, pmax, mode);
if ((guint)(*cpu) == mon_cpu)
break;
}
}
g_strfreev (lines);
g_free (buffer);
return (count == 6);
}
static gboolean
cpufreq_procfs_cpu_is_online (void)
{
return g_file_test ("/proc/cpufreq",
G_FILE_TEST_EXISTS | G_FILE_TEST_IS_REGULAR);
}
static gboolean
cpufreq_monitor_procfs_run (CPUFreqMonitor *monitor)
{
gint fmax, fmin, cpu;
gint pmin, pmax;
gchar mode[21];
gint cur_freq, max_freq;
gchar *governor;
if (!cpufreq_monitor_procfs_parse (CPUFREQ_MONITOR_PROCFS (monitor),
&cpu, &fmax, &pmin, &pmax, &fmin, mode)) {
/* Check whether it failed because
* cpu is not online.
*/
if (!cpufreq_procfs_cpu_is_online ()) {
g_object_set (G_OBJECT (monitor), "online", FALSE, NULL);
return TRUE;
}
return FALSE;
}
governor = mode;
max_freq = fmax;
if (g_ascii_strcasecmp (governor, "powersave") == 0) {
cur_freq = fmin;
} else if (g_ascii_strcasecmp (governor, "performance") == 0) {
cur_freq = fmax;
} else if (g_ascii_strcasecmp (governor, "userspace") == 0) {
cur_freq = cpufreq_monitor_procfs_get_freq_from_userspace (cpu);
} else {
cur_freq = fmax;
}
g_object_set (G_OBJECT (monitor),
"online", TRUE,
"governor", governor,
"frequency", cur_freq,
"max-frequency", max_freq,
NULL);
return TRUE;
}
static GList *
cpufreq_monitor_procfs_get_available_frequencies (CPUFreqMonitor *monitor)
{
gint fmax, fmin, cpu, freq;
gint pmin, pmax;
gchar mode[21];
GList *list = NULL;
if (!cpufreq_monitor_procfs_parse (CPUFREQ_MONITOR_PROCFS (monitor), &cpu,
&fmax, &pmin, &pmax, &fmin, mode)) {
return NULL;
}
if ((pmax > 0) && (pmax != 100)) {
freq = (fmax * 100) / pmax;
list = g_list_prepend (list, g_strdup_printf ("%d", freq));
}
list = g_list_prepend (list, g_strdup_printf ("%d", fmax));
if (fmax != fmin)
list = g_list_prepend (list, g_strdup_printf ("%d", fmin));
return g_list_reverse (list);
}
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