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#include <iostream>
#include <fstream>
#include <stdio.h>
#include <sys/types.h>
#include <dirent.h>
#include <math.h>
#include "../lib.h"
#include "device.h"
#include "thinkpad-fan.h"
#include "../parameters/parameters.h"
#include "../process/powerconsumer.h"
#include <string.h>
thinkpad_fan::thinkpad_fan()
{
start_rate = 0;
end_rate = 0;
}
void thinkpad_fan::start_measurement(void)
{
/* read the rpms of the fan */
start_rate = read_sysfs("/sys/devices/platform/thinkpad_hwmon/fan1_input");
}
void thinkpad_fan::end_measurement(void)
{
end_rate = read_sysfs("/sys/devices/platform/thinkpad_hwmon/fan1_input");
report_utilization("thinkpad-fan", utilization());
}
double thinkpad_fan::utilization(void)
{
return (start_rate+end_rate) / 100.0;
}
void create_thinkpad_fan(void)
{
char filename[4096];
class thinkpad_fan *fan;
strcpy(filename, "/sys/devices/platform/thinkpad_hwmon/fan1_input");
if (access(filename, R_OK) !=0)
return;
register_parameter("thinkpad-fan");
fan = new class thinkpad_fan();
all_devices.push_back(fan);
}
double thinkpad_fan::power_usage(struct result_bundle *result, struct parameter_bundle *bundle)
{
double power;
double factor;
double utilization;
power = 0;
utilization = get_result_value("thinkpad-fan", result);
utilization = utilization - 50;
if (utilization < 0)
utilization = 0;
factor = get_parameter_value("thinkpad-fan-sqr", bundle);
power += factor * pow(utilization / 100.0, 2);
factor = get_parameter_value("thinkpad-fan", bundle);
power -= utilization * factor / 100.0;
if (power <= 0.0)
power = 0.0;
return power;
}
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