| /* |
| * Copyright (C) 2008 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 com.android.internal.os; |
| |
| import android.os.IBinder; |
| import android.os.SystemClock; |
| import android.util.EventLog; |
| |
| import java.lang.ref.WeakReference; |
| import java.util.ArrayList; |
| |
| /** |
| * Private and debugging Binder APIs. |
| * |
| * @see IBinder |
| */ |
| public class BinderInternal { |
| static WeakReference<GcWatcher> sGcWatcher |
| = new WeakReference<GcWatcher>(new GcWatcher()); |
| static ArrayList<Runnable> sGcWatchers = new ArrayList<>(); |
| static Runnable[] sTmpWatchers = new Runnable[1]; |
| static long sLastGcTime; |
| |
| static final class GcWatcher { |
| @Override |
| protected void finalize() throws Throwable { |
| handleGc(); |
| sLastGcTime = SystemClock.uptimeMillis(); |
| synchronized (sGcWatchers) { |
| sTmpWatchers = sGcWatchers.toArray(sTmpWatchers); |
| } |
| for (int i=0; i<sTmpWatchers.length; i++) { |
| if (sTmpWatchers[i] != null) { |
| sTmpWatchers[i].run(); |
| } |
| } |
| sGcWatcher = new WeakReference<GcWatcher>(new GcWatcher()); |
| } |
| } |
| |
| public static void addGcWatcher(Runnable watcher) { |
| synchronized (sGcWatchers) { |
| sGcWatchers.add(watcher); |
| } |
| } |
| |
| /** |
| * Add the calling thread to the IPC thread pool. This function does |
| * not return until the current process is exiting. |
| */ |
| public static final native void joinThreadPool(); |
| |
| /** |
| * Return the system time (as reported by {@link SystemClock#uptimeMillis |
| * SystemClock.uptimeMillis()}) that the last garbage collection occurred |
| * in this process. This is not for general application use, and the |
| * meaning of "when a garbage collection occurred" will change as the |
| * garbage collector evolves. |
| * |
| * @return Returns the time as per {@link SystemClock#uptimeMillis |
| * SystemClock.uptimeMillis()} of the last garbage collection. |
| */ |
| public static long getLastGcTime() { |
| return sLastGcTime; |
| } |
| |
| /** |
| * Return the global "context object" of the system. This is usually |
| * an implementation of IServiceManager, which you can use to find |
| * other services. |
| */ |
| public static final native IBinder getContextObject(); |
| |
| /** |
| * Special for system process to not allow incoming calls to run at |
| * background scheduling priority. |
| * @hide |
| */ |
| public static final native void disableBackgroundScheduling(boolean disable); |
| |
| static native final void handleGc(); |
| |
| public static void forceGc(String reason) { |
| EventLog.writeEvent(2741, reason); |
| Runtime.getRuntime().gc(); |
| } |
| |
| static void forceBinderGc() { |
| forceGc("Binder"); |
| } |
| } |