1 #pragma once
2 
3 #include "sensor.hpp"
4 
5 #include <sdbusplus/bus.hpp>
6 #include <sdbusplus/server.hpp>
7 #include <xyz/openbmc_project/Sensor/Value/server.hpp>
8 
9 #include <memory>
10 #include <mutex>
11 #include <type_traits>
12 
13 template <typename... T>
14 using ServerObject = typename sdbusplus::server::object::object<T...>;
15 
16 using ValueInterface = sdbusplus::xyz::openbmc_project::Sensor::server::Value;
17 using ValueObject = ServerObject<ValueInterface>;
18 
19 class ValueHelper : public ValueInterface
20 {
21 
22   public:
23     auto operator()() const
24     {
25         return value();
26     }
27 };
28 
29 constexpr bool usingDouble =
30     std::is_same_v<std::result_of_t<ValueHelper()>, double>;
31 using ValueType = std::conditional_t<usingDouble, double, int64_t>;
32 
33 /*
34  * HostSensor object is a Sensor derivative that also implements a ValueObject,
35  * which comes from the dbus as an object that implements Sensor.Value.
36  */
37 class HostSensor : public Sensor, public ValueObject
38 {
39   public:
40     static std::unique_ptr<Sensor> createTemp(const std::string& name,
41                                               int64_t timeout,
42                                               sdbusplus::bus::bus& bus,
43                                               const char* objPath, bool defer);
44 
45     HostSensor(const std::string& name, int64_t timeout,
46                sdbusplus::bus::bus& bus, const char* objPath, bool defer) :
47         Sensor(name, timeout),
48         ValueObject(bus, objPath, defer)
49     {}
50 
51     ValueType value(ValueType value) override;
52 
53     ReadReturn read(void) override;
54     void write(double value) override;
55 
56   private:
57     /*
58      * _lock will be used to make sure _updated & _value are updated
59      * together.
60      */
61     std::mutex _lock;
62     std::chrono::high_resolution_clock::time_point _updated;
63     double _value = 0;
64 };
65