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/*
* Copyright (C) 2019 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.wifi;
import android.annotation.SystemApi;
import android.app.SystemServiceRegistry;
import android.content.Context;
import android.net.wifi.aware.IWifiAwareManager;
import android.net.wifi.aware.WifiAwareManager;
import android.net.wifi.p2p.IWifiP2pManager;
import android.net.wifi.p2p.WifiP2pManager;
import android.net.wifi.rtt.IWifiRttManager;
import android.net.wifi.rtt.WifiRttManager;
import android.os.HandlerThread;
import android.os.Looper;
/**
* Class for performing registration for all Wifi services.
*
* @hide
*/
@SystemApi
public class WifiFrameworkInitializer {
/**
* A class implementing the lazy holder idiom: the unique static instance
* of {@link #INSTANCE} is instantiated in a thread-safe way (guaranteed by
* the language specs) the first time that NoPreloadHolder is referenced in getInstanceLooper().
*
* This is necessary because we can't spawn a new thread in {@link #registerServiceWrappers()}.
* {@link #registerServiceWrappers()} is called during the Zygote phase, which disallows
* spawning new threads. Naming the class "NoPreloadHolder" ensures that the classloader will
* not preload this class, inadvertently spawning the thread too early.
*/
private static class NoPreloadHolder {
private static final HandlerThread INSTANCE = createInstance();
private static HandlerThread createInstance() {
HandlerThread thread = new HandlerThread("WifiManagerThread");
thread.start();
return thread;
}
}
private static Looper getInstanceLooper() {
return NoPreloadHolder.INSTANCE.getLooper();
}
private WifiFrameworkInitializer() {}
/**
* Called by {@link SystemServiceRegistry}'s static initializer and registers all Wifi services
* to {@link Context}, so that {@link Context#getSystemService} can return them.
*
* @throws IllegalStateException if this is called from anywhere besides
* {@link SystemServiceRegistry}
*/
public static void registerServiceWrappers() {
SystemServiceRegistry.registerContextAwareService(
Context.WIFI_SERVICE,
WifiManager.class,
(context, serviceBinder) -> {
IWifiManager service = IWifiManager.Stub.asInterface(serviceBinder);
return new WifiManager(context, service, getInstanceLooper());
}
);
SystemServiceRegistry.registerStaticService(
Context.WIFI_P2P_SERVICE,
WifiP2pManager.class,
serviceBinder -> {
IWifiP2pManager service = IWifiP2pManager.Stub.asInterface(serviceBinder);
return new WifiP2pManager(service);
}
);
SystemServiceRegistry.registerContextAwareService(
Context.WIFI_AWARE_SERVICE,
WifiAwareManager.class,
(context, serviceBinder) -> {
IWifiAwareManager service = IWifiAwareManager.Stub.asInterface(serviceBinder);
return new WifiAwareManager(context, service);
}
);
SystemServiceRegistry.registerContextAwareService(
Context.WIFI_SCANNING_SERVICE,
WifiScanner.class,
(context, serviceBinder) -> {
IWifiScanner service = IWifiScanner.Stub.asInterface(serviceBinder);
return new WifiScanner(context, service, getInstanceLooper());
}
);
SystemServiceRegistry.registerContextAwareService(
Context.WIFI_RTT_RANGING_SERVICE,
WifiRttManager.class,
(context, serviceBinder) -> {
IWifiRttManager service = IWifiRttManager.Stub.asInterface(serviceBinder);
return new WifiRttManager(context, service);
}
);
SystemServiceRegistry.registerContextAwareService(
Context.WIFI_RTT_SERVICE,
RttManager.class,
context -> {
WifiRttManager wifiRttManager = context.getSystemService(WifiRttManager.class);
return new RttManager(context, wifiRttManager);
}
);
}
}
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