6669250034
The display manager must never call into the activity manager with its lock held. Make it clear that the adapters are constructed while holding the syncroot lock. Bug: 7377631 Change-Id: I1557313cbb31dcad9b5a46919a88a5a1c1af3e9b
72 lines
2.5 KiB
Java
72 lines
2.5 KiB
Java
/*
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* Copyright (C) 2012 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.server.display;
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import android.content.Context;
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import android.os.Handler;
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import android.util.DisplayMetrics;
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/**
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* Provides a fake default display for headless systems.
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* <p>
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* Display adapters are guarded by the {@link DisplayManagerService.SyncRoot} lock.
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* </p>
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*/
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final class HeadlessDisplayAdapter extends DisplayAdapter {
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private static final String TAG = "HeadlessDisplayAdapter";
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// Called with SyncRoot lock held.
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public HeadlessDisplayAdapter(DisplayManagerService.SyncRoot syncRoot,
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Context context, Handler handler, Listener listener) {
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super(syncRoot, context, handler, listener, TAG);
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}
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@Override
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public void registerLocked() {
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super.registerLocked();
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sendDisplayDeviceEventLocked(new HeadlessDisplayDevice(), DISPLAY_DEVICE_EVENT_ADDED);
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}
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private final class HeadlessDisplayDevice extends DisplayDevice {
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private DisplayDeviceInfo mInfo;
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public HeadlessDisplayDevice() {
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super(HeadlessDisplayAdapter.this, null);
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}
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@Override
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public DisplayDeviceInfo getDisplayDeviceInfoLocked() {
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if (mInfo == null) {
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mInfo = new DisplayDeviceInfo();
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mInfo.name = getContext().getResources().getString(
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com.android.internal.R.string.display_manager_built_in_display_name);
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mInfo.width = 640;
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mInfo.height = 480;
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mInfo.refreshRate = 60;
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mInfo.densityDpi = DisplayMetrics.DENSITY_DEFAULT;
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mInfo.xDpi = 160;
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mInfo.yDpi = 160;
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mInfo.flags = DisplayDeviceInfo.FLAG_DEFAULT_DISPLAY
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| DisplayDeviceInfo.FLAG_SECURE
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| DisplayDeviceInfo.FLAG_SUPPORTS_PROTECTED_BUFFERS;
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mInfo.touch = DisplayDeviceInfo.TOUCH_NONE;
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}
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return mInfo;
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}
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}
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}
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