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Side by Side Diff: device/generic_sensor/platform_sensor.cc

Issue 2144623003: [sensors] Introduce Generic Sensor API interfaces (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Comments from Tim and Ken Created 4 years, 4 months ago
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1 // Copyright 2016 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "device/generic_sensor/platform_sensor.h"
6
7 #include <utility>
8
9 #include "device/generic_sensor/platform_sensor_configuration.h"
10 #include "device/generic_sensor/platform_sensor_provider.h"
11
12 namespace device {
13
14 PlatformSensor::PlatformSensor(mojom::SensorType type,
15 mojo::ScopedSharedBufferMapping mapping,
16 PlatformSensorProvider* provider)
17 : shared_buffer_mapping_(std::move(mapping)),
18 type_(type),
19 provider_(provider),
20 weak_factory_(this) {}
21
22 PlatformSensor::~PlatformSensor() {
23 provider_->RemoveSensor(GetType());
24 }
25
26 mojom::SensorType PlatformSensor::GetType() const {
27 return type_;
28 }
29
30 bool PlatformSensor::StartListening(Client* client,
31 const PlatformSensorConfiguration& config) {
32 DCHECK(clients_.HasObserver(client));
33 if (!CheckSensorConfiguration(config))
34 return false;
35
36 auto& config_list = config_map_[client];
37 config_list.push_back(config);
38
39 if (!UpdateSensorInternal(config_map_)) {
40 config_list.pop_back();
41 return false;
42 }
43
44 return true;
45 }
46
47 bool PlatformSensor::StopListening(Client* client,
48 const PlatformSensorConfiguration& config) {
49 DCHECK(clients_.HasObserver(client));
50 auto client_entry = config_map_.find(client);
51 if (client_entry == config_map_.end())
52 return false;
53
54 auto& config_list = client_entry->second;
55 auto config_entry = std::find(config_list.begin(), config_list.end(), config);
56 if (config_entry == config_list.end())
57 return false;
58
59 config_list.erase(config_entry);
60
61 return UpdateSensorInternal(config_map_);
62 }
63
64 void PlatformSensor::UpdateSensor() {
65 UpdateSensorInternal(config_map_);
66 }
67
68 void PlatformSensor::AddClient(Client* client) {
69 DCHECK(client);
70 clients_.AddObserver(client);
71 }
72
73 void PlatformSensor::RemoveClient(Client* client) {
74 DCHECK(client);
75 clients_.RemoveObserver(client);
76 auto client_entry = config_map_.find(client);
77 if (client_entry != config_map_.end()) {
78 config_map_.erase(client_entry);
79 UpdateSensorInternal(config_map_);
80 }
81 }
82
83 void PlatformSensor::NotifySensorReadingChanged() {
84 FOR_EACH_OBSERVER(Client, clients_, OnSensorReadingChanged());
85 }
86
87 void PlatformSensor::NotifySensorError() {
88 FOR_EACH_OBSERVER(Client, clients_, OnSensorError());
89 }
90
91 } // namespace device
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