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/*
* Copyright (C) 2022 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.
*/
#define LOG_TAG "MDnsEventReporter"
#include "MDnsEventReporter.h"
using android::IInterface;
using android::sp;
using android::net::mdns::aidl::IMDnsEventListener;
MDnsEventReporter& MDnsEventReporter::getInstance() {
// It should be initialized only once.
static MDnsEventReporter instance;
return instance;
}
const MDnsEventReporter::EventListenerSet& MDnsEventReporter::getEventListeners() const {
return getEventListenersImpl();
}
int MDnsEventReporter::addEventListener(const sp<IMDnsEventListener>& listener) {
return addEventListenerImpl(listener);
}
int MDnsEventReporter::removeEventListener(const sp<IMDnsEventListener>& listener) {
return removeEventListenerImpl(listener);
}
const MDnsEventReporter::EventListenerSet& MDnsEventReporter::getEventListenersImpl() const {
std::lock_guard lock(mMutex);
return mEventListeners;
}
int MDnsEventReporter::addEventListenerImpl(const sp<IMDnsEventListener>& listener) {
if (listener == nullptr) {
ALOGE("The event listener should not be null");
return -EINVAL;
}
std::lock_guard lock(mMutex);
for (const auto& it : mEventListeners) {
if (IInterface::asBinder(it->getListener()).get() == IInterface::asBinder(listener).get()) {
ALOGW("The event listener was already subscribed");
return -EEXIST;
}
}
auto eventListener = sp<EventListener>::make(this, listener);
IInterface::asBinder(listener)->linkToDeath(eventListener);
mEventListeners.insert(eventListener);
return 0;
}
int MDnsEventReporter::removeEventListenerImpl(const sp<IMDnsEventListener>& listener) {
if (listener == nullptr) {
ALOGE("The event listener should not be null");
return -EINVAL;
}
std::lock_guard lock(mMutex);
for (const auto& it : mEventListeners) {
const auto& binder = IInterface::asBinder(it->getListener());
if (binder == IInterface::asBinder(listener)) {
binder->unlinkToDeath(it);
mEventListeners.erase(it);
return 0;
}
}
ALOGE("The event listener does not exist");
return -ENOENT;
}
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