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 <cmath>
18 #include <iostream>
19 #include <memory>
20 #include <mutex>
21 
22 #include "host.hpp"
23 
24 std::unique_ptr<Sensor> HostSensor::CreateTemp(
25     const std::string& name,
26     int64_t timeout,
27     sdbusplus::bus::bus& bus,
28     const char* objPath,
29     bool defer)
30 {
31     auto sensor = std::make_unique<HostSensor>(name, timeout, bus, objPath, defer);
32     sensor->value(0);
33 
34     // DegreesC and value of 0 are the defaults at present, therefore testing
35     // this code only sees scale get updated as a property.
36 
37     // TODO(venture): Need to not hard-code that this is DegreesC and scale
38     // 10x-3 unless it is! :D
39     sensor->unit(ValueInterface::Unit::DegreesC);
40     sensor->scale(-3);
41     sensor->emit_object_added();
42     // emit_object_added() can be called twice, harmlessly, the second time it
43     // doesn't actually happen, but we don't want to call it before we set up
44     // the initial values, so we should not let someone call this with
45     // defer=false.
46 
47     /* TODO(venture): Need to set that _updated is set to epoch or something
48      * else.  what is the default value?
49      */
50     return sensor;
51 }
52 
53 int64_t HostSensor::value(int64_t value)
54 {
55     std::lock_guard<std::mutex> guard(_lock);
56 
57     _updated = std::chrono::high_resolution_clock::now();
58     _value = value * pow(10, scale()); /* scale value */
59 
60     return ValueObject::value(value);
61 }
62 
63 ReadReturn HostSensor::read(void)
64 {
65     std::lock_guard<std::mutex> guard(_lock);
66 
67     /* This doesn't sanity check anything, that's the caller's job. */
68     struct ReadReturn r = {
69         _value,
70         _updated
71     };
72 
73     return r;
74 }
75 
76 void HostSensor::write(double value)
77 {
78     throw std::runtime_error("Not Implemented.");
79 }
80 
81