| /* |
| * Copyright (C) 2023 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.server.am; |
| |
| import android.os.OomKillRecord; |
| import android.util.Slog; |
| |
| /** Connection to the out-of-memory (OOM) events' file */ |
| public final class OomConnection { |
| private static final String TAG = "OomConnection"; |
| |
| /** Connection listener interface */ |
| public interface OomConnectionListener { |
| |
| /** |
| * Callback function to handle the newest OOM kills. |
| * |
| * @param oomKills List of oom kills received from `waitOom()` |
| */ |
| void handleOomEvent(OomKillRecord[] oomKills); |
| } |
| |
| private final OomConnectionListener mOomListener; |
| |
| private final OomConnectionThread mOomConnectionThread; |
| |
| private static native OomKillRecord[] waitOom(); |
| |
| public OomConnection(OomConnectionListener listener) { |
| mOomListener = listener; |
| mOomConnectionThread = new OomConnectionThread(); |
| mOomConnectionThread.start(); |
| } |
| |
| private final class OomConnectionThread extends Thread { |
| public void run() { |
| while (true) { |
| OomKillRecord[] oom_kills = null; |
| try { |
| oom_kills = waitOom(); |
| mOomListener.handleOomEvent(oom_kills); |
| } catch (RuntimeException e) { |
| Slog.e(TAG, "failed waiting for OOM events: " + e); |
| break; |
| } |
| } |
| } |
| } |
| } |