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/*
* Copyright 2010, Intel Corporation
*
* This file is part of PowerTOP
*
* This program file 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; version 2 of the License.
*
* This program 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 program in a file named COPYING; if not, write to the
* Free Software Foundation, Inc,
* 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA
* or just google for it.
*
* Authors:
* Arjan van de Ven <arjan@linux.intel.com>
*/
#include "measurement.h"
#include "acpi.h"
#include "extech.h"
#include "sysfs.h"
#include "opal-sensors.h"
#include "../parameters/parameters.h"
#include "../lib.h"
#include <string>
#include <sys/types.h>
#include <dirent.h>
#include <stdio.h>
#include <fstream>
#include <unistd.h>
#include <time.h>
double min_power = 50000.0;
void power_meter::start_measurement(void)
{
}
void power_meter::end_measurement(void)
{
}
double power_meter::power(void)
{
return 0.0;
}
vector<class power_meter *> power_meters;
static struct timespec tlast;
void start_power_measurement(void)
{
unsigned int i;
clock_gettime(CLOCK_REALTIME, &tlast);
for (i = 0; i < power_meters.size(); i++)
power_meters[i]->start_measurement();
all_results.joules = 0.0;
}
void end_power_measurement(void)
{
unsigned int i;
for (i = 0; i < power_meters.size(); i++)
power_meters[i]->end_measurement();
}
double global_power(void)
{
bool global_discharging = false;
double total = 0.0;
unsigned int i;
for (i = 0; i < power_meters.size(); i++) {
global_discharging |= power_meters[i]->is_discharging();
total += power_meters[i]->power();
}
/* report global time left if at least one battery is discharging */
if (!global_discharging)
return 0.0;
all_results.power = total;
if (total < min_power && total > 0.01)
min_power = total;
return total;
}
void global_sample_power(void)
{
struct timespec tnow;
clock_gettime(CLOCK_REALTIME, &tnow);
/* power * time = joules */
all_results.joules += global_power() * \
( ((double)tnow.tv_sec + 1.0e-9*tnow.tv_nsec) - \
((double)tlast.tv_sec + 1.0e-9*tlast.tv_nsec));
tlast = tnow;
}
double global_joules(void)
{
return all_results.joules;
}
double global_time_left(void)
{
bool global_discharging = false;
double total_capacity = 0.0;
double total_rate = 0.0;
unsigned int i;
for (i = 0; i < power_meters.size(); i++) {
global_discharging |= power_meters[i]->is_discharging();
total_capacity += power_meters[i]->dev_capacity();
total_rate += power_meters[i]->power();
}
/* report global time left if at least one battery is discharging */
if (!global_discharging)
return 0.0;
/* return 0.0 instead of INF+ */
if (total_rate < 0.001)
return 0.0;
return total_capacity / total_rate;
}
void sysfs_power_meters_callback(const char *d_name)
{
std::string type = read_sysfs_string("/sys/class/power_supply/%s/type", d_name);
if (type != "Battery" && type != "UPS")
return;
class sysfs_power_meter *meter;
meter = new(std::nothrow) class sysfs_power_meter(d_name);
if (meter)
power_meters.push_back(meter);
}
void acpi_power_meters_callback(const char *d_name)
{
class acpi_power_meter *meter;
meter = new(std::nothrow) class acpi_power_meter(d_name);
if (meter)
power_meters.push_back(meter);
}
void sysfs_opal_sensors_callback(const char *d_name)
{
class opal_sensors_power_meter *meter;
const char *c;
/* Those that end in / are directories and we don't want them */
c = strrchr(d_name, '/');
if (c && *(c+1) == '\0')
return;
meter = new(std::nothrow) class opal_sensors_power_meter(d_name);
if (meter)
power_meters.push_back(meter);
}
void detect_power_meters(void)
{
process_directory("/sys/class/power_supply", sysfs_power_meters_callback);
process_glob("/sys/devices/platform/opal-sensor/hwmon/hwmon*/power*", sysfs_opal_sensors_callback);
if (power_meters.size() == 0) {
process_directory("/proc/acpi/battery", acpi_power_meters_callback);
}
}
void extech_power_meter(const char *devnode)
{
class extech_power_meter *meter;
meter = new class extech_power_meter(devnode);
power_meters.push_back(meter);
}
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