/*
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* Copyright (C) 2016 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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package android.net;
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import android.os.HandlerThread;
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import android.os.Looper;
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/**
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* Shared singleton connectivity thread for the system. This is a thread for
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* connectivity operations such as AsyncChannel connections to system services.
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* Various connectivity manager objects can use this singleton as a common
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* resource for their handlers instead of creating separate threads of their own.
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* @hide
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*/
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public final class ConnectivityThread extends HandlerThread {
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// A class implementing the lazy holder idiom: the unique static instance
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// of ConnectivityThread is instantiated in a thread-safe way (guaranteed by
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// the language specs) the first time that Singleton is referenced in get()
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// or getInstanceLooper().
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private static class Singleton {
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private static final ConnectivityThread INSTANCE = createInstance();
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}
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private ConnectivityThread() {
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super("ConnectivityThread");
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}
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private static ConnectivityThread createInstance() {
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ConnectivityThread t = new ConnectivityThread();
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t.start();
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return t;
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}
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public static ConnectivityThread get() {
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return Singleton.INSTANCE;
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}
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public static Looper getInstanceLooper() {
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return Singleton.INSTANCE.getLooper();
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}
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}
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