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/sensors/manager.cpp b/sensors/manager.cpp
new file mode 100644
index 0000000..590ca80
--- /dev/null
+++ b/sensors/manager.cpp
@@ -0,0 +1,248 @@
+/**
+ * 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 <cstring>
+#include <iostream>
+#include <libconfig.h++>
+#include <map>
+#include <memory>
+
+/* Configuration. */
+#include "conf.hpp"
+
+#include "interfaces.hpp"
+#include "manager.hpp"
+#include "util.hpp"
+
+#include "dbus/dbuspassive.hpp"
+#include "notimpl/readonly.hpp"
+#include "notimpl/writeonly.hpp"
+#include "sysfs/sysfsread.hpp"
+#include "sensors/manager.hpp"
+#include "sensors/host.hpp"
+#include "sensors/pluggable.hpp"
+#include "sysfs/sysfswrite.hpp"
+
+
+static constexpr bool deferSignals = true;
+
+std::shared_ptr<SensorManager> BuildSensors(
+ std::map<std::string, struct sensor>& Config)
+{
+ auto mgmr = std::make_shared<SensorManager>();
+ auto& HostSensorBus = mgmr->getHostBus();
+ auto& PassiveListeningBus = mgmr->getPassiveBus();
+
+ for (auto& it : Config)
+ {
+ std::unique_ptr<ReadInterface> ri;
+ std::unique_ptr<WriteInterface> wi;
+
+ std::string name = it.first;
+ struct sensor* info = &it.second;
+
+ std::cerr << "Sensor: " << name << " " << info->type << " ";
+ std::cerr << info->readpath << " " << info->writepath << "\n";
+
+ IOInterfaceType rtype = GetReadInterfaceType(info->readpath);
+ IOInterfaceType wtype = GetWriteInterfaceType(info->writepath);
+
+ // fan sensors can be ready any way and written others.
+ // fan sensors are the only sensors this is designed to write.
+ // Nothing here should be write-only, although, in theory a fan could be.
+ // I'm just not sure how that would fit together.
+ // TODO(venture): It should check with the ObjectMapper to check if
+ // that sensor exists on the Dbus.
+ switch (rtype)
+ {
+ case IOInterfaceType::DBUSPASSIVE:
+ ri = std::make_unique<DbusPassive>(
+ PassiveListeningBus,
+ info->type,
+ name);
+ break;
+ case IOInterfaceType::EXTERNAL:
+ // These are a special case for read-only.
+ break;
+ case IOInterfaceType::SYSFS:
+ ri = std::make_unique<SysFsRead>(info->readpath);
+ break;
+ default:
+ ri = std::make_unique<WriteOnly>();
+ break;
+ }
+
+ if (info->type == "fan")
+ {
+ switch (wtype)
+ {
+ case IOInterfaceType::SYSFS:
+ if (info->max > 0)
+ {
+ wi = std::make_unique<SysFsWritePercent>(
+ info->writepath,
+ info->min,
+ info->max);
+ }
+ else
+ {
+ wi = std::make_unique<SysFsWrite>(
+ info->writepath,
+ info->min,
+ info->max);
+ }
+
+ break;
+ default:
+ wi = std::make_unique<ReadOnlyNoExcept>();
+ break;
+ }
+
+ auto sensor = std::make_unique<PluggableSensor>(
+ name,
+ info->timeout,
+ std::move(ri),
+ std::move(wi));
+ mgmr->addSensor(info->type, name, std::move(sensor));
+ }
+ else if (info->type == "temp" || info->type == "margin")
+ {
+ // These sensors are read-only, but only for this application
+ // which only writes to fan sensors.
+ std::cerr << info->type << " readpath: " << info->readpath << "\n";
+
+ if (IOInterfaceType::EXTERNAL == rtype)
+ {
+ std::cerr << "Creating HostSensor: " << name
+ << " path: " << info->readpath << "\n";
+
+ /*
+ * The reason we handle this as a HostSensor is because it's
+ * not quite pluggable; but maybe it could be.
+ */
+ auto sensor = HostSensor::CreateTemp(
+ name,
+ info->timeout,
+ HostSensorBus,
+ info->readpath.c_str(),
+ deferSignals);
+ mgmr->addSensor(info->type, name, std::move(sensor));
+ }
+ else
+ {
+ wi = std::make_unique<ReadOnlyNoExcept>();
+ auto sensor = std::make_unique<PluggableSensor>(
+ name,
+ info->timeout,
+ std::move(ri),
+ std::move(wi));
+ mgmr->addSensor(info->type, name, std::move(sensor));
+ }
+ }
+ }
+
+ return mgmr;
+}
+
+/*
+ * If there's a configuration file, we build from that, and it requires special
+ * parsing. I should just ditch the compile-time version to reduce the
+ * probability of sync bugs.
+ */
+std::shared_ptr<SensorManager> BuildSensorsFromConfig(std::string& path)
+{
+ using namespace libconfig;
+
+ std::map<std::string, struct sensor> config;
+ Config cfg;
+
+ std::cerr << "entered BuildSensorsFromConfig\n";
+
+ /* The load was modeled after the example source provided. */
+ try
+ {
+ cfg.readFile(path.c_str());
+ }
+ catch (const FileIOException& fioex)
+ {
+ std::cerr << "I/O error while reading file: " << fioex.what() << std::endl;
+ throw;
+ }
+ catch (const ParseException& pex)
+ {
+ std::cerr << "Parse error at " << pex.getFile() << ":" << pex.getLine()
+ << " - " << pex.getError() << std::endl;
+ throw;
+ }
+
+ try
+ {
+ const Setting& root = cfg.getRoot();
+
+ /* Grab the list of sensors and create them all */
+ const Setting& sensors = root["sensors"];
+ int count = sensors.getLength();
+
+ for (int i = 0; i < count; ++i)
+ {
+ const Setting& sensor = sensors[i];
+
+ std::string name;
+ struct sensor thisOne;
+
+ /* Not a super fan of using this library for run-time configuration. */
+ name = sensor.lookup("name").c_str();
+ thisOne.type = sensor.lookup("type").c_str();
+ thisOne.readpath = sensor.lookup("readpath").c_str();
+ thisOne.writepath = sensor.lookup("writepath").c_str();
+
+ /* TODO: Document why this is wonky. The library probably doesn't
+ * like int64_t
+ */
+ int min = sensor.lookup("min");
+ thisOne.min = static_cast<int64_t>(min);
+ int max = sensor.lookup("max");
+ thisOne.max = static_cast<int64_t>(max);
+ int timeout = sensor.lookup("timeout");
+ thisOne.timeout = static_cast<int64_t>(timeout);
+
+ // leaving for verification for now. and yea the above is
+ // necessary.
+ std::cerr << "min: " << min
+ << " max: " << max
+ << " savedmin: " << thisOne.min
+ << " savedmax: " << thisOne.max
+ << " timeout: " << thisOne.timeout
+ << std::endl;
+
+ config[name] = thisOne;
+ }
+ }
+ catch (const SettingTypeException &setex)
+ {
+ std::cerr << "Setting '" << setex.getPath()
+ << "' type exception!" << std::endl;
+ throw;
+ }
+ catch (const SettingNotFoundException& snex)
+ {
+ std::cerr << "Setting not found!" << std::endl;
+ throw;
+ }
+
+ return BuildSensors(config);
+}
+