Sensor Objects
This includes all the sensor objects including a few
implementations, including dbus and sysfs sensors.
Change-Id: I9897c79f9fd463f00f0e02aeb6c32ffa89635dbe
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/dbus/dbuspassive.cpp b/dbus/dbuspassive.cpp
new file mode 100644
index 0000000..25a0148
--- /dev/null
+++ b/dbus/dbuspassive.cpp
@@ -0,0 +1,107 @@
+/**
+ * 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 <chrono>
+#include <cmath>
+#include <mutex>
+
+#include "dbuspassive.hpp"
+
+DbusPassive::DbusPassive(
+ sdbusplus::bus::bus& bus,
+ const std::string& type,
+ const std::string& id)
+ : ReadInterface(),
+ _bus(bus),
+ _signal(bus, GetMatch(type, id).c_str(), DbusHandleSignal, this),
+ _id(id)
+{
+ /* Need to get the scale and initial value */
+ auto tempBus = sdbusplus::bus::new_default();
+ /* service == busname */
+ std::string path = GetSensorPath(type, id);
+ std::string service = GetService(tempBus, sensorintf, path);
+
+ struct SensorProperties settings;
+ GetProperties(tempBus, service, path, &settings);
+
+ _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();
+}
+
+int64_t DbusPassive::getScale(void)
+{
+ return _scale;
+}
+
+std::string DbusPassive::getId(void)
+{
+ return _id;
+}
+
+int DbusHandleSignal(sd_bus_message* msg, void* usrData, sd_bus_error* err)
+{
+ namespace sdm = sdbusplus::message;
+ auto sdbpMsg = sdm::message(msg);
+ DbusPassive* obj = static_cast<DbusPassive*>(usrData);
+
+ std::string msgSensor;
+ std::map<std::string, sdm::variant<int64_t>> msgData;
+ sdbpMsg.read(msgSensor, msgData);
+
+ if (msgSensor == "xyz.openbmc_project.Sensor.Value")
+ {
+ auto valPropMap = msgData.find("Value");
+ if (valPropMap != msgData.end())
+ {
+ int64_t rawValue = sdm::variant_ns::get<int64_t>
+ (valPropMap->second);
+
+ double value = rawValue * pow(10, obj->getScale());
+
+#if 0
+ std::cerr << "received update: " << value
+ << " for: " << obj->getId()
+ << std::endl;
+#endif
+
+ obj->setValue(value);
+ }
+ }
+
+ return 0;
+}