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