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/*
* Copyright (C) 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "ThermalService.h"
#include <android/os/IThermalService.h>
#include <android/os/IThermalEventListener.h>
#include <android/os/Temperature.h>
#include <binder/IPCThreadState.h>
#include <binder/IServiceManager.h>
#include <utils/Errors.h>
#include <utils/Mutex.h>
#include <utils/String16.h>
namespace android {
namespace os {
/**
* Notify registered listeners of a thermal throttling start/stop event.
* @param temperature the temperature at which the event was generated
*/
binder::Status ThermalService::notifyThrottling(
const bool isThrottling, const Temperature& temperature) {
Mutex::Autolock _l(mListenersLock);
mThrottled = isThrottling;
mThrottleTemperature = temperature;
for (size_t i = 0; i < mListeners.size(); i++) {
mListeners[i]->notifyThrottling(isThrottling, temperature);
}
return binder::Status::ok();
}
/**
* Query whether the system is currently thermal throttling.
* @return true if currently thermal throttling, else false
*/
binder::Status ThermalService::isThrottling(bool* _aidl_return) {
Mutex::Autolock _l(mListenersLock);
*_aidl_return = mThrottled;
return binder::Status::ok();
}
/**
* Register a new thermal event listener.
* @param listener the client's IThermalEventListener instance to which
* notifications are to be sent
*/
binder::Status ThermalService::registerThermalEventListener(
const sp<IThermalEventListener>& listener) {
{
if (listener == NULL)
return binder::Status::ok();
Mutex::Autolock _l(mListenersLock);
// check whether this is a duplicate
for (size_t i = 0; i < mListeners.size(); i++) {
if (IInterface::asBinder(mListeners[i]) ==
IInterface::asBinder(listener)) {
return binder::Status::ok();
}
}
mListeners.add(listener);
IInterface::asBinder(listener)->linkToDeath(this);
}
return binder::Status::ok();
}
/**
* Unregister a previously-registered thermal event listener.
* @param listener the client's IThermalEventListener instance to which
* notifications are to no longer be sent
*/
binder::Status ThermalService::unregisterThermalEventListener(
const sp<IThermalEventListener>& listener) {
if (listener == NULL)
return binder::Status::ok();
Mutex::Autolock _l(mListenersLock);
for (size_t i = 0; i < mListeners.size(); i++) {
if (IInterface::asBinder(mListeners[i]) ==
IInterface::asBinder(listener)) {
IInterface::asBinder(mListeners[i])->unlinkToDeath(this);
mListeners.removeAt(i);
break;
}
}
return binder::Status::ok();
}
void ThermalService::binderDied(const wp<IBinder>& who) {
Mutex::Autolock _l(mListenersLock);
for (size_t i = 0; i < mListeners.size(); i++) {
if (IInterface::asBinder(mListeners[i]) == who) {
mListeners.removeAt(i);
break;
}
}
}
/**
* Publish the supplied ThermalService to servicemanager.
*/
void ThermalService::publish(
const sp<ThermalService>& service) {
defaultServiceManager()->addService(String16("thermalservice"),
service);
}
} // namespace os
} // namespace android
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