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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>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <glib.h>
#include <glib/gstdio.h>
#include <cpufreq.h>
#include <stdlib.h>
#include <linux/version.h>
#include "cpufreq-selector-libcpufreq.h"
static gboolean
cpufreq_selector_libcpufreq_set_frequency (CPUFreqSelector *selector,
guint frequency,
GError **error);
static gboolean
cpufreq_selector_libcpufreq_set_governor (CPUFreqSelector *selector,
const gchar *governor,
GError **error);
G_DEFINE_TYPE (CPUFreqSelectorLibcpufreq, cpufreq_selector_libcpufreq, CPUFREQ_TYPE_SELECTOR)
#ifdef HAVE_GET_FREQUENCIES
typedef struct cpufreq_frequencies CPUFreqFrequencyList;
#define cpufreq_get_available_frequencies(cpu) cpufreq_get_frequencies ("available", cpu)
#define cpufreq_put_available_frequencies(first) cpufreq_put_frequencies (first)
#else
typedef struct cpufreq_available_frequencies CPUFreqFrequencyList;
#endif
typedef struct cpufreq_policy CPUFreqPolicy;
typedef struct cpufreq_available_governors CPUFreqGovernorList;
static void
cpufreq_selector_libcpufreq_init (CPUFreqSelectorLibcpufreq *selector)
{
}
static void
cpufreq_selector_libcpufreq_class_init (CPUFreqSelectorLibcpufreqClass *klass)
{
CPUFreqSelectorClass *selector_class = CPUFREQ_SELECTOR_CLASS (klass);
selector_class->set_frequency = cpufreq_selector_libcpufreq_set_frequency;
selector_class->set_governor = cpufreq_selector_libcpufreq_set_governor;
}
CPUFreqSelector *
cpufreq_selector_libcpufreq_new (guint cpu)
{
CPUFreqSelector *selector;
selector = CPUFREQ_SELECTOR (g_object_new (CPUFREQ_TYPE_SELECTOR_LIBCPUFREQ,
"cpu", cpu,
NULL));
return selector;
}
static guint
cpufreq_selector_libcpufreq_get_valid_frequency (CPUFreqSelectorLibcpufreq *selector,
guint frequency)
{
guint cpu;
gint dist = G_MAXINT;
guint retval = 0;
CPUFreqFrequencyList *freqs, *freq;
g_object_get (G_OBJECT (selector),
"cpu", &cpu,
NULL);
freqs = cpufreq_get_available_frequencies (cpu);
if (!freqs)
return 0;
for (freq = freqs; freq; freq = freq->next) {
guint current_dist;
if (freq->frequency == frequency) {
cpufreq_put_available_frequencies (freqs);
return frequency;
}
current_dist = abs ((int)freq->frequency - (int)frequency);
if (current_dist < dist) {
dist = current_dist;
retval = freq->frequency;
}
}
return retval;
}
static gboolean
cpufreq_selector_libcpufreq_set_frequency (CPUFreqSelector *selector,
guint frequency,
GError **error)
{
guint freq;
guint cpu;
g_object_get (G_OBJECT (selector),
"cpu", &cpu,
NULL);
freq = cpufreq_selector_libcpufreq_get_valid_frequency (CPUFREQ_SELECTOR_LIBCPUFREQ (selector),
frequency);
if (cpufreq_set_frequency (cpu, freq) != 0) {
g_set_error (error,
CPUFREQ_SELECTOR_ERROR,
SELECTOR_ERROR_SET_FREQUENCY,
"Cannot set frequency '%d'",
frequency);
return FALSE;
}
return TRUE;
}
static gboolean
cpufreq_selector_libcpufreq_validate_governor (CPUFreqSelectorLibcpufreq *selector,
const gchar *governor)
{
guint cpu;
CPUFreqGovernorList *govs, *gov;
g_object_get (G_OBJECT (selector),
"cpu", &cpu,
NULL);
govs = cpufreq_get_available_governors (cpu);
if (!govs)
return FALSE;
for (gov = govs; gov; gov = gov->next) {
if (g_ascii_strcasecmp (gov->governor, governor) == 0) {
cpufreq_put_available_governors (govs);
return TRUE;
}
}
cpufreq_put_available_governors (govs);
return FALSE;
}
static gboolean
cpufreq_selector_libcpufreq_set_governor (CPUFreqSelector *selector,
const gchar *governor,
GError **error)
{
CPUFreqSelectorLibcpufreq *selector_libcpufreq;
guint cpu;
selector_libcpufreq = CPUFREQ_SELECTOR_LIBCPUFREQ (selector);
if (!cpufreq_selector_libcpufreq_validate_governor (selector_libcpufreq, governor)) {
g_set_error (error,
CPUFREQ_SELECTOR_ERROR,
SELECTOR_ERROR_INVALID_GOVERNOR,
"Invalid governor '%s'",
governor);
return FALSE;
}
g_object_get (G_OBJECT (selector),
"cpu", &cpu,
NULL);
if (cpufreq_modify_policy_governor (cpu, (gchar *)governor) != 0) {
g_set_error (error,
CPUFREQ_SELECTOR_ERROR,
SELECTOR_ERROR_INVALID_GOVERNOR,
"Invalid governor '%s'",
governor);
return FALSE;
}
return TRUE;
}
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