blob: 6d8aa03c9bdeb9ebd18a227cba756912633a1efe [file] [log] [blame]
/**
* Copyright 2017 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "dbuspassive.hpp"
#include "dbus/util.hpp"
#include <chrono>
#include <cmath>
#include <memory>
#include <mutex>
#include <sdbusplus/bus.hpp>
#include <string>
#include <variant>
std::unique_ptr<ReadInterface> DbusPassive::createDbusPassive(
sdbusplus::bus::bus& bus, const std::string& type, const std::string& id,
DbusHelperInterface* helper)
{
if (helper == nullptr)
{
return nullptr;
}
if (!validType(type))
{
return nullptr;
}
/* Need to get the scale and initial value */
auto tempBus = sdbusplus::bus::new_system();
/* service == busname */
std::string path = getSensorPath(type, id);
struct SensorProperties settings;
bool failed;
try
{
std::string service = helper->getService(tempBus, sensorintf, path);
helper->getProperties(tempBus, service, path, &settings);
failed = helper->thresholdsAsserted(tempBus, service, path);
}
catch (const std::exception& e)
{
return nullptr;
}
return std::make_unique<DbusPassive>(bus, type, id, helper, settings,
failed);
}
DbusPassive::DbusPassive(sdbusplus::bus::bus& bus, const std::string& type,
const std::string& id, DbusHelperInterface* helper,
const struct SensorProperties& settings, bool failed) :
ReadInterface(),
_bus(bus), _signal(bus, getMatch(type, id).c_str(), dbusHandleSignal, this),
_id(id), _helper(helper), _failed(failed)
{
_scale = settings.scale;
_value = settings.value * pow(10, _scale);
_updated = std::chrono::high_resolution_clock::now();
}
ReadReturn DbusPassive::read(void)
{
std::lock_guard<std::mutex> guard(_lock);
struct ReadReturn r = {_value, _updated};
return r;
}
void DbusPassive::setValue(double value)
{
std::lock_guard<std::mutex> guard(_lock);
_value = value;
_updated = std::chrono::high_resolution_clock::now();
}
bool DbusPassive::getFailed(void) const
{
return _failed;
}
void DbusPassive::setFailed(bool value)
{
_failed = value;
}
int64_t DbusPassive::getScale(void)
{
return _scale;
}
std::string DbusPassive::getID(void)
{
return _id;
}
int handleSensorValue(sdbusplus::message::message& msg, DbusPassive* owner)
{
std::string msgSensor;
std::map<std::string, std::variant<int64_t, double, bool>> msgData;
msg.read(msgSensor, msgData);
if (msgSensor == "xyz.openbmc_project.Sensor.Value")
{
auto valPropMap = msgData.find("Value");
if (valPropMap != msgData.end())
{
double value =
std::visit(VariantToDoubleVisitor(), valPropMap->second);
value *= std::pow(10, owner->getScale());
owner->setValue(value);
}
}
else if (msgSensor == "xyz.openbmc_project.Sensor.Threshold.Critical")
{
auto criticalAlarmLow = msgData.find("CriticalAlarmLow");
auto criticalAlarmHigh = msgData.find("CriticalAlarmHigh");
if (criticalAlarmHigh == msgData.end() &&
criticalAlarmLow == msgData.end())
{
return 0;
}
bool asserted = false;
if (criticalAlarmLow != msgData.end())
{
asserted = std::get<bool>(criticalAlarmLow->second);
}
// checking both as in theory you could de-assert one threshold and
// assert the other at the same moment
if (!asserted && criticalAlarmHigh != msgData.end())
{
asserted = std::get<bool>(criticalAlarmHigh->second);
}
owner->setFailed(asserted);
}
return 0;
}
int dbusHandleSignal(sd_bus_message* msg, void* usrData, sd_bus_error* err)
{
auto sdbpMsg = sdbusplus::message::message(msg);
DbusPassive* obj = static_cast<DbusPassive*>(usrData);
return handleSensorValue(sdbpMsg, obj);
}