Wale Ogunwale | c4e63a4 | 2018-10-02 13:19:54 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2018 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License |
| 15 | */ |
| 16 | |
Wale Ogunwale | 5950709 | 2018-10-29 09:00:30 -0700 | [diff] [blame] | 17 | package com.android.server.wm; |
Wale Ogunwale | c4e63a4 | 2018-10-02 13:19:54 -0700 | [diff] [blame] | 18 | |
Wale Ogunwale | 5950709 | 2018-10-29 09:00:30 -0700 | [diff] [blame] | 19 | import static com.android.server.wm.ActivityStack.ActivityState.PAUSING; |
| 20 | import static com.android.server.wm.ActivityStack.ActivityState.RESUMED; |
Wale Ogunwale | c4e63a4 | 2018-10-02 13:19:54 -0700 | [diff] [blame] | 21 | |
| 22 | import java.io.PrintWriter; |
| 23 | import java.util.HashSet; |
| 24 | import java.util.Iterator; |
| 25 | import java.util.function.Consumer; |
| 26 | |
| 27 | /** |
| 28 | * Class for tracking the connections to services on the AM side that activities on the |
| 29 | * WM side (in the future) bind with for things like oom score adjustment. Would normally be one |
| 30 | * instance of this per activity for tracking all services connected to that activity. AM will |
| 31 | * sometimes query this to bump the OOM score for the processes with services connected to visible |
| 32 | * activities. |
| 33 | */ |
| 34 | public class ActivityServiceConnectionsHolder<T> { |
| 35 | |
| 36 | private final ActivityTaskManagerService mService; |
| 37 | |
| 38 | /** The activity the owns this service connection object. */ |
| 39 | private final ActivityRecord mActivity; |
| 40 | |
| 41 | /** |
| 42 | * The service connection object bounded with the owning activity. They represent |
| 43 | * ConnectionRecord on the AM side, however we don't need to know their object representation |
| 44 | * on the WM side since we don't perform operations on the object. Mainly here for communication |
| 45 | * and booking with the AM side. |
| 46 | */ |
| 47 | private HashSet<T> mConnections; |
| 48 | |
| 49 | ActivityServiceConnectionsHolder(ActivityTaskManagerService service, ActivityRecord activity) { |
| 50 | mService = service; |
| 51 | mActivity = activity; |
| 52 | } |
| 53 | |
| 54 | /** Adds a connection record that the activity has bound to a specific service. */ |
| 55 | public void addConnection(T c) { |
| 56 | synchronized (mService.mGlobalLock) { |
| 57 | if (mConnections == null) { |
| 58 | mConnections = new HashSet<>(); |
| 59 | } |
| 60 | mConnections.add(c); |
| 61 | } |
| 62 | } |
| 63 | |
| 64 | /** Removed a connection record between the activity and a specific service. */ |
| 65 | public void removeConnection(T c) { |
| 66 | synchronized (mService.mGlobalLock) { |
| 67 | if (mConnections == null) { |
| 68 | return; |
| 69 | } |
| 70 | mConnections.remove(c); |
| 71 | } |
| 72 | } |
| 73 | |
| 74 | public boolean isActivityVisible() { |
| 75 | synchronized (mService.mGlobalLock) { |
| 76 | return mActivity.visible || mActivity.isState(RESUMED, PAUSING); |
| 77 | } |
| 78 | } |
| 79 | |
| 80 | public int getActivityPid() { |
| 81 | synchronized (mService.mGlobalLock) { |
| 82 | return mActivity.hasProcess() ? mActivity.app.getPid() : -1; |
| 83 | } |
| 84 | } |
| 85 | |
| 86 | public void forEachConnection(Consumer<T> consumer) { |
| 87 | synchronized (mService.mGlobalLock) { |
| 88 | if (mConnections == null || mConnections.isEmpty()) { |
| 89 | return; |
| 90 | } |
| 91 | final Iterator<T> it = mConnections.iterator(); |
| 92 | while (it.hasNext()) { |
| 93 | T c = it.next(); |
| 94 | consumer.accept(c); |
| 95 | } |
| 96 | } |
| 97 | } |
| 98 | |
| 99 | /** Removes the connection between the activity and all services that were connected to it. */ |
| 100 | void disconnectActivityFromServices() { |
| 101 | if (mConnections == null || mConnections.isEmpty()) { |
| 102 | return; |
| 103 | } |
| 104 | mService.mH.post(() -> mService.mAmInternal.disconnectActivityFromServices(this)); |
| 105 | } |
| 106 | |
| 107 | public void dump(PrintWriter pw, String prefix) { |
| 108 | synchronized (mService.mGlobalLock) { |
| 109 | pw.println(prefix + "activity=" + mActivity); |
| 110 | } |
| 111 | } |
| 112 | |
| 113 | } |