1 /*
2  * Copyright (C) 2019 The Android Open Source Project
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 #pragma once
18 
19 #include <optional>
20 
21 #include <android/hardware/health/2.1/IHealth.h>
22 #include <health/HealthLoop.h>
23 
24 namespace android {
25 namespace hardware {
26 namespace health {
27 namespace V2_1 {
28 namespace implementation {
29 
30 // An implementation of HealthLoop for using a given health HAL. This is useful
31 // for services that opens the passthrough implementation and starts the HealthLoop
32 // to periodically poll data from the implementation.
33 class HalHealthLoop : public HealthLoop {
34   public:
HalHealthLoop(const std::string & name,const sp<IHealth> & service)35     HalHealthLoop(const std::string& name, const sp<IHealth>& service)
36         : instance_name_(name), service_(service) {}
37 
38   protected:
39     virtual void Init(struct healthd_config* config) override;
40     virtual void Heartbeat() override;
41     virtual int PrepareToWait() override;
42     virtual void ScheduleBatteryUpdate() override;
43 
44     // HealthLoop periodically calls ScheduleBatteryUpdate, which calls
45     // OnHealthInfoChanged callback. A client can override this function to
46     // broadcast the health_info to interested listeners. By default, this
47     // adjust uevents / wakealarm periods.
48     virtual void OnHealthInfoChanged(const HealthInfo& health_info);
49 
instance_name()50     const std::string& instance_name() const { return instance_name_; }
service()51     const sp<IHealth>& service() const { return service_; }
charger_online()52     bool charger_online() const { return charger_online_; }
53 
54     // Helpers for subclasses to implement OnHealthInfoChanged.
55     void set_charger_online(const HealthInfo& health_info);
56 
57   private:
58     std::string instance_name_;
59     sp<IHealth> service_;
60     bool charger_online_ = false;
61 };
62 
63 }  // namespace implementation
64 }  // namespace V2_1
65 }  // namespace health
66 }  // namespace hardware
67 }  // namespace android
68