1/*
2 * Copyright (C) 2017 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#include "ThermalService.h"
18#include <android/os/IThermalService.h>
19#include <android/os/IThermalEventListener.h>
20#include <android/os/Temperature.h>
21#include <binder/IPCThreadState.h>
22#include <binder/IServiceManager.h>
23#include <utils/Errors.h>
24#include <utils/Mutex.h>
25#include <utils/String16.h>
26
27namespace android {
28namespace os {
29
30/**
31 * Notify registered listeners of a thermal throttling start/stop event.
32 * @param temperature the temperature at which the event was generated
33 */
34binder::Status ThermalService::notifyThrottling(
35    const bool isThrottling, const Temperature& temperature) {
36    Mutex::Autolock _l(mListenersLock);
37
38    mThrottled = isThrottling;
39    mThrottleTemperature = temperature;
40
41    for (size_t i = 0; i < mListeners.size(); i++) {
42      mListeners[i]->notifyThrottling(isThrottling, temperature);
43    }
44    return binder::Status::ok();
45}
46
47/**
48 * Query whether the system is currently thermal throttling.
49 * @return true if currently thermal throttling, else false
50 */
51binder::Status ThermalService::isThrottling(bool* _aidl_return) {
52    Mutex::Autolock _l(mListenersLock);
53    *_aidl_return = mThrottled;
54    return binder::Status::ok();
55}
56
57/**
58 * Register a new thermal event listener.
59 * @param listener the client's IThermalEventListener instance to which
60 *                 notifications are to be sent
61 */
62binder::Status ThermalService::registerThermalEventListener(
63    const sp<IThermalEventListener>& listener) {
64    {
65        if (listener == NULL)
66            return binder::Status::ok();
67        Mutex::Autolock _l(mListenersLock);
68        // check whether this is a duplicate
69        for (size_t i = 0; i < mListeners.size(); i++) {
70            if (IInterface::asBinder(mListeners[i]) ==
71                IInterface::asBinder(listener)) {
72                return binder::Status::ok();
73            }
74        }
75
76        mListeners.add(listener);
77        IInterface::asBinder(listener)->linkToDeath(this);
78    }
79
80    return binder::Status::ok();
81}
82
83/**
84 * Unregister a previously-registered thermal event listener.
85 * @param listener the client's IThermalEventListener instance to which
86 *                 notifications are to no longer be sent
87 */
88binder::Status ThermalService::unregisterThermalEventListener(
89    const sp<IThermalEventListener>& listener) {
90    if (listener == NULL)
91        return binder::Status::ok();
92    Mutex::Autolock _l(mListenersLock);
93    for (size_t i = 0; i < mListeners.size(); i++) {
94        if (IInterface::asBinder(mListeners[i]) ==
95            IInterface::asBinder(listener)) {
96            IInterface::asBinder(mListeners[i])->unlinkToDeath(this);
97            mListeners.removeAt(i);
98            break;
99        }
100    }
101
102    return binder::Status::ok();
103}
104
105void ThermalService::binderDied(const wp<IBinder>& who) {
106    Mutex::Autolock _l(mListenersLock);
107
108    for (size_t i = 0; i < mListeners.size(); i++) {
109        if (IInterface::asBinder(mListeners[i]) == who) {
110            mListeners.removeAt(i);
111            break;
112        }
113    }
114}
115
116/**
117 * Publish the supplied ThermalService to servicemanager.
118 */
119void ThermalService::publish(
120    const sp<ThermalService>& service) {
121    defaultServiceManager()->addService(String16("thermalservice"),
122                                        service);
123}
124
125}  // namespace os
126}  // namespace android
127