78 lines
2.9 KiB
C++
78 lines
2.9 KiB
C++
/*
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* Copyright (C) 2022 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <android-base/thread_annotations.h>
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#include <android/net/mdns/aidl/IMDnsEventListener.h>
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#include <set>
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class MDnsEventReporter final {
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public:
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class EventListener : public android::IBinder::DeathRecipient {
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public:
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EventListener(MDnsEventReporter* eventReporter,
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const android::sp<android::net::mdns::aidl::IMDnsEventListener>& listener)
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: mEventReporter(eventReporter), mListener(listener) {}
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~EventListener() override = default;
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void binderDied(const android::wp<android::IBinder>& /* who */) override {
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mEventReporter->removeEventListenerImpl(mListener);
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}
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android::sp<android::net::mdns::aidl::IMDnsEventListener> getListener() {
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return mListener;
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}
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private:
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MDnsEventReporter* mEventReporter;
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android::sp<android::net::mdns::aidl::IMDnsEventListener> mListener;
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};
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MDnsEventReporter(const MDnsEventReporter&) = delete;
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MDnsEventReporter& operator=(const MDnsEventReporter&) = delete;
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using EventListenerSet = std::set<android::sp<EventListener>>;
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// Get the instance of the singleton MDnsEventReporter.
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static MDnsEventReporter& getInstance();
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// Return registered binder services from the singleton MDnsEventReporter. This method is
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// threadsafe.
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const EventListenerSet& getEventListeners() const;
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// Add the binder to the singleton MDnsEventReporter. This method is threadsafe.
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int addEventListener(const android::sp<android::net::mdns::aidl::IMDnsEventListener>& listener);
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// Remove the binder from the singleton MDnsEventReporter. This method is threadsafe.
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int removeEventListener(
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const android::sp<android::net::mdns::aidl::IMDnsEventListener>& listener);
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private:
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MDnsEventReporter() = default;
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~MDnsEventReporter() = default;
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mutable std::mutex mMutex;
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EventListenerSet mEventListeners GUARDED_BY(mMutex);
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int addEventListenerImpl(
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const android::sp<android::net::mdns::aidl::IMDnsEventListener>& listener)
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EXCLUDES(mMutex);
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int removeEventListenerImpl(
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const android::sp<android::net::mdns::aidl::IMDnsEventListener>& listener)
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EXCLUDES(mMutex);
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const EventListenerSet& getEventListenersImpl() const EXCLUDES(mMutex);
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};
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