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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.
*/
#pragma once
#include <android-base/thread_annotations.h>
#include <android/net/mdns/aidl/IMDnsEventListener.h>
#include <set>
class MDnsEventReporter final {
public:
class EventListener : public android::IBinder::DeathRecipient {
public:
EventListener(MDnsEventReporter* eventReporter,
const android::sp<android::net::mdns::aidl::IMDnsEventListener>& listener)
: mEventReporter(eventReporter), mListener(listener) {}
~EventListener() override = default;
void binderDied(const android::wp<android::IBinder>& /* who */) override {
mEventReporter->removeEventListenerImpl(mListener);
}
android::sp<android::net::mdns::aidl::IMDnsEventListener> getListener() {
return mListener;
}
private:
MDnsEventReporter* mEventReporter;
android::sp<android::net::mdns::aidl::IMDnsEventListener> mListener;
};
MDnsEventReporter(const MDnsEventReporter&) = delete;
MDnsEventReporter& operator=(const MDnsEventReporter&) = delete;
using EventListenerSet = std::set<android::sp<EventListener>>;
// Get the instance of the singleton MDnsEventReporter.
static MDnsEventReporter& getInstance();
// Return registered binder services from the singleton MDnsEventReporter. This method is
// threadsafe.
const EventListenerSet& getEventListeners() const;
// Add the binder to the singleton MDnsEventReporter. This method is threadsafe.
int addEventListener(const android::sp<android::net::mdns::aidl::IMDnsEventListener>& listener);
// Remove the binder from the singleton MDnsEventReporter. This method is threadsafe.
int removeEventListener(
const android::sp<android::net::mdns::aidl::IMDnsEventListener>& listener);
private:
MDnsEventReporter() = default;
~MDnsEventReporter() = default;
mutable std::mutex mMutex;
EventListenerSet mEventListeners GUARDED_BY(mMutex);
int addEventListenerImpl(
const android::sp<android::net::mdns::aidl::IMDnsEventListener>& listener)
EXCLUDES(mMutex);
int removeEventListenerImpl(
const android::sp<android::net::mdns::aidl::IMDnsEventListener>& listener)
EXCLUDES(mMutex);
const EventListenerSet& getEventListenersImpl() const EXCLUDES(mMutex);
};
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