1 files changed, 221 insertions, 0 deletions
diff --git a/cpufreq/src/cpufreq-monitor-procfs.c b/cpufreq/src/cpufreq-monitor-procfs.c
new file mode 100644
index 00000000..97c635ba
--- /dev/null
+++ b/cpufreq/src/cpufreq-monitor-procfs.c
@@ -0,0 +1,221 @@
+/*
+ * MATE CPUFreq Applet
+ * Copyright (C) 2004 Carlos Garcia Campos <[email protected]>
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * Authors : Carlos Garc�a Campos <[email protected]>
+ */
+
+#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 void cpufreq_monitor_procfs_class_init (CPUFreqMonitorProcfsClass *klass);
+
+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);
+}
+