WebViewUpdateService.java revision 08cfaf672604422dd355d6703aec78f3aa5ee74e 
1/*
2 * Copyright (C) 2012 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
17package com.android.server.webkit;
18
19import android.os.Binder;
20import android.os.Process;
21import android.util.Log;
22import android.webkit.IWebViewUpdateService;
23
24/**
25 * Private service to wait for the updatable WebView to be ready for use.
26 * @hide
27 */
28public class WebViewUpdateService extends IWebViewUpdateService.Stub {
29
30    private static final String TAG = "WebViewUpdateService";
31
32    private boolean mRelroReady32Bit = false;
33    private boolean mRelroReady64Bit = false;
34
35    public WebViewUpdateService() {
36    }
37
38    /**
39     * The shared relro process calls this to notify us that it's done trying to create a relro
40     * file.
41     */
42    public void notifyRelroCreationCompleted(boolean is64Bit, boolean success) {
43        // Verify that the caller is the shared relro process.
44        if (Binder.getCallingUid() != Process.SHARED_RELRO_UID) {
45            return;
46        }
47
48        synchronized (this) {
49            if (is64Bit) {
50                mRelroReady64Bit = true;
51            } else {
52                mRelroReady32Bit = true;
53            }
54            this.notifyAll();
55        }
56    }
57
58    /**
59     * WebViewFactory calls this to block WebView loading until the relro file is created.
60     */
61    public void waitForRelroCreationCompleted(boolean is64Bit) {
62        synchronized (this) {
63            if (is64Bit) {
64                while (!mRelroReady64Bit) {
65                    try {
66                        this.wait();
67                    } catch (InterruptedException e) {}
68                }
69            } else {
70                while (!mRelroReady32Bit) {
71                    try {
72                        this.wait();
73                    } catch (InterruptedException e) {}
74                }
75            }
76        }
77    }
78}
79