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(
37 const std::string& name, int64_t timeout, sdbusplus::bus_t& bus,
38 const char* objPath, bool defer)
39 {
40 auto sensor =
41 std::make_unique<HostSensor>(name, timeout, bus, objPath, defer);
42 sensor->value(0);
43
44 // DegreesC and value of 0 are the defaults at present, therefore testing
45 // this code only sees scale get updated as a property.
46
47 // TODO(venture): Need to not hard-code that this is DegreesC and scale
48 // 10x-3 unless it is! :D
49 sensor->unit(ValueInterface::Unit::DegreesC);
50 scaleHelper(sensor, -3);
51 sensor->emit_object_added();
52 // emit_object_added() can be called twice, harmlessly, the second time it
53 // doesn't actually happen, but we don't want to call it before we set up
54 // the initial values, so we should not let someone call this with
55 // defer=false.
56
57 /* TODO(venture): Need to set that _updated is set to epoch or something
58 * else. what is the default value?
59 */
60 return sensor;
61 }
62
63 template <typename T>
getScale(T * sensor)64 int64_t getScale(T* sensor)
65 {
66 if constexpr (std::is_same_v<ValueType, int64_t>)
67 {
68 return sensor->scale();
69 }
70 return 0;
71 }
72
value(ValueType value)73 ValueType HostSensor::value(ValueType value)
74 {
75 std::lock_guard<std::mutex> guard(_lock);
76
77 _updated = std::chrono::high_resolution_clock::now();
78 _value = value * pow(10, getScale(this)); /* scale value */
79
80 return ValueObject::value(value);
81 }
82
read(void)83 ReadReturn HostSensor::read(void)
84 {
85 std::lock_guard<std::mutex> guard(_lock);
86
87 /* This doesn't sanity check anything, that's the caller's job. */
88 ReadReturn r = {_value, _updated};
89
90 return r;
91 }
92
write(double value)93 void HostSensor::write([[maybe_unused]] double value)
94 {
95 throw std::runtime_error("Not Implemented.");
96 }
97
getFailed(void)98 bool HostSensor::getFailed(void)
99 {
100 if (std::isfinite(_value))
101 {
102 return false;
103 }
104
105 return true;
106 }
107
108 } // namespace pid_control
109