1 /**
2 * Copyright 2017 Google Inc.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "host.hpp"
18
19 #include <cmath>
20 #include <iostream>
21 #include <memory>
22 #include <mutex>
23
24 namespace pid_control
25 {
26
27 template <typename T>
scaleHelper(T & ptr,int64_t value)28 void scaleHelper(T& ptr, int64_t value)
29 {
30 if constexpr (std::is_same_v<ValueType, int64_t>)
31 {
32 ptr->scale(value);
33 }
34 }
35
createTemp(const std::string & name,int64_t timeout,sdbusplus::bus_t & bus,const char * objPath,bool defer)36 std::unique_ptr<Sensor> HostSensor::createTemp(const std::string& name,
37 int64_t timeout,
38 sdbusplus::bus_t& bus,
39 const char* objPath, bool defer)
40 {
41 auto sensor = std::make_unique<HostSensor>(name, timeout, bus, objPath,
42 defer);
43 sensor->value(0);
44
45 // DegreesC and value of 0 are the defaults at present, therefore testing
46 // this code only sees scale get updated as a property.
47
48 // TODO(venture): Need to not hard-code that this is DegreesC and scale
49 // 10x-3 unless it is! :D
50 sensor->unit(ValueInterface::Unit::DegreesC);
51 scaleHelper(sensor, -3);
52 sensor->emit_object_added();
53 // emit_object_added() can be called twice, harmlessly, the second time it
54 // doesn't actually happen, but we don't want to call it before we set up
55 // the initial values, so we should not let someone call this with
56 // defer=false.
57
58 /* TODO(venture): Need to set that _updated is set to epoch or something
59 * else. what is the default value?
60 */
61 return sensor;
62 }
63
64 template <typename T>
getScale(T * sensor)65 int64_t getScale(T* sensor)
66 {
67 if constexpr (std::is_same_v<ValueType, int64_t>)
68 {
69 return sensor->scale();
70 }
71 return 0;
72 }
73
value(ValueType value)74 ValueType HostSensor::value(ValueType value)
75 {
76 std::lock_guard<std::mutex> guard(_lock);
77
78 _updated = std::chrono::high_resolution_clock::now();
79 _value = value * pow(10, getScale(this)); /* scale value */
80
81 return ValueObject::value(value);
82 }
83
read(void)84 ReadReturn HostSensor::read(void)
85 {
86 std::lock_guard<std::mutex> guard(_lock);
87
88 /* This doesn't sanity check anything, that's the caller's job. */
89 ReadReturn r = {_value, _updated};
90
91 return r;
92 }
93
write(double value)94 void HostSensor::write([[maybe_unused]] double value)
95 {
96 throw std::runtime_error("Not Implemented.");
97 }
98
getFailed(void)99 bool HostSensor::getFailed(void)
100 {
101 if (std::isfinite(_value))
102 {
103 return false;
104 }
105
106 return true;
107 }
108
109 } // namespace pid_control
110