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