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-rw-r--r--services/core/java/com/android/server/connectivity/PacManager.java41
1 files changed, 22 insertions, 19 deletions
diff --git a/services/core/java/com/android/server/connectivity/PacManager.java b/services/core/java/com/android/server/connectivity/PacManager.java
index 34826b669347..d56fb1ab09f9 100644
--- a/services/core/java/com/android/server/connectivity/PacManager.java
+++ b/services/core/java/com/android/server/connectivity/PacManager.java
@@ -15,6 +15,7 @@
*/
package com.android.server.connectivity;
+import android.annotation.WorkerThread;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
@@ -74,7 +75,7 @@ public class PacManager {
public static final String KEY_PROXY = "keyProxy";
private String mCurrentPac;
@GuardedBy("mProxyLock")
- private Uri mPacUrl = Uri.EMPTY;
+ private volatile Uri mPacUrl = Uri.EMPTY;
private AlarmManager mAlarmManager;
@GuardedBy("mProxyLock")
@@ -87,33 +88,37 @@ public class PacManager {
private int mCurrentDelay;
private int mLastPort;
- private boolean mHasSentBroadcast;
- private boolean mHasDownloaded;
+ private volatile boolean mHasSentBroadcast;
+ private volatile boolean mHasDownloaded;
private Handler mConnectivityHandler;
private int mProxyMessage;
/**
- * Used for locking when setting mProxyService and all references to mPacUrl or mCurrentPac.
+ * Used for locking when setting mProxyService and all references to mCurrentPac.
*/
private final Object mProxyLock = new Object();
+ /**
+ * Runnable to download PAC script.
+ * The behavior relies on the assamption it always run on mNetThread to guarantee that the
+ * latest data fetched from mPacUrl is stored in mProxyService.
+ */
private Runnable mPacDownloader = new Runnable() {
@Override
+ @WorkerThread
public void run() {
String file;
- synchronized (mProxyLock) {
- if (Uri.EMPTY.equals(mPacUrl)) return;
- final int oldTag = TrafficStats
- .getAndSetThreadStatsTag(TrafficStats.TAG_SYSTEM_PAC);
- try {
- file = get(mPacUrl);
- } catch (IOException ioe) {
- file = null;
- Log.w(TAG, "Failed to load PAC file: " + ioe);
- } finally {
- TrafficStats.setThreadStatsTag(oldTag);
- }
+ final Uri pacUrl = mPacUrl;
+ if (Uri.EMPTY.equals(pacUrl)) return;
+ final int oldTag = TrafficStats.getAndSetThreadStatsTag(TrafficStats.TAG_SYSTEM_PAC);
+ try {
+ file = get(pacUrl);
+ } catch (IOException ioe) {
+ file = null;
+ Log.w(TAG, "Failed to load PAC file: " + ioe);
+ } finally {
+ TrafficStats.setThreadStatsTag(oldTag);
}
if (file != null) {
synchronized (mProxyLock) {
@@ -176,9 +181,7 @@ public class PacManager {
// Allow to send broadcast, nothing to do.
return false;
}
- synchronized (mProxyLock) {
- mPacUrl = proxy.getPacFileUrl();
- }
+ mPacUrl = proxy.getPacFileUrl();
mCurrentDelay = DELAY_1;
mHasSentBroadcast = false;
mHasDownloaded = false;