Merge "Made AccessPoint's scan result list thread safe" into qt-dev (fb5ee6da) · Commits · e / os / android_frameworks_base

packages/SettingsLib/src/com/android/settingslib/wifi/AccessPoint.java

+66 −39

Original line number	Diff line number	Diff line
		@@ -55,6 +55,7 @@ import android.util.ArraySet;
		import android.util.Log;
		import android.util.Pair;

		import androidx.annotation.GuardedBy;
		import androidx.annotation.NonNull;

		import com.android.internal.annotations.VisibleForTesting;
		@@ -108,6 +109,14 @@ public class AccessPoint implements Comparable<AccessPoint> {
		/** The key which identifies this AccessPoint grouping. */
		private String mKey;

		/**
		* Synchronization lock for managing concurrency between main and worker threads.
		*
		* <p>This lock should be held for all modifications to {@link #mScanResults} and
		* {@link #mExtraScanResults}.
		*/
		private final Object mLock = new Object();

		@IntDef({Speed.NONE, Speed.SLOW, Speed.MODERATE, Speed.FAST, Speed.VERY_FAST})
		@Retention(RetentionPolicy.SOURCE)
		public @interface Speed {
		@@ -134,12 +143,14 @@ public class AccessPoint implements Comparable<AccessPoint> {
		}

		/** The underlying set of scan results comprising this AccessPoint. */
		@GuardedBy("mLock")
		private final ArraySet<ScanResult> mScanResults = new ArraySet<>();

		/**
		* Extra set of unused scan results corresponding to this AccessPoint for verbose logging
		* purposes, such as a set of Passpoint roaming scan results when home scans are available.
		*/
		@GuardedBy("mLock")
		private final ArraySet<ScanResult> mExtraScanResults = new ArraySet<>();

		/**
		@@ -489,9 +500,11 @@ public class AccessPoint implements Comparable<AccessPoint> {

		if (isVerboseLoggingEnabled()) {
		builder.append(",rssi=").append(mRssi);
		synchronized (mLock) {
		builder.append(",scan cache size=").append(mScanResults.size()
		+ mExtraScanResults.size());
		}
		}

		return builder.append(')').toString();
		}
		@@ -532,6 +545,7 @@ public class AccessPoint implements Comparable<AccessPoint> {
		*/
		private boolean updateScores(WifiNetworkScoreCache scoreCache, long maxScoreCacheAgeMillis) {
		long nowMillis = SystemClock.elapsedRealtime();
		synchronized (mLock) {
		for (ScanResult result : mScanResults) {
		ScoredNetwork score = scoreCache.getScoredNetwork(result);
		if (score == null) {
		@@ -546,6 +560,7 @@ public class AccessPoint implements Comparable<AccessPoint> {
		timedScore.update(score, nowMillis);
		}
		}
		}

		// Remove old cached networks
		long evictionCutoff = nowMillis - maxScoreCacheAgeMillis;
		@@ -619,6 +634,7 @@ public class AccessPoint implements Comparable<AccessPoint> {
		mIsScoredNetworkMetered \|= score.meteredHint;
		}
		} else {
		synchronized (mLock) {
		for (ScanResult result : mScanResults) {
		ScoredNetwork score = scoreCache.getScoredNetwork(result);
		if (score == null) {
		@@ -627,6 +643,7 @@ public class AccessPoint implements Comparable<AccessPoint> {
		mIsScoredNetworkMetered \|= score.meteredHint;
		}
		}
		}
		return oldMetering == mIsScoredNetworkMetered;
		}

		@@ -741,8 +758,10 @@ public class AccessPoint implements Comparable<AccessPoint> {
		*/
		public Set<ScanResult> getScanResults() {
		Set<ScanResult> allScans = new ArraySet<>();
		synchronized (mLock) {
		allScans.addAll(mScanResults);
		allScans.addAll(mExtraScanResults);
		}
		return allScans;
		}

		@@ -766,12 +785,14 @@ public class AccessPoint implements Comparable<AccessPoint> {

		ScanResult bestResult = null;
		int bestRssi = UNREACHABLE_RSSI;
		synchronized (mLock) {
		for (ScanResult result : mScanResults) {
		if (result.level > bestRssi) {
		bestRssi = result.level;
		bestResult = result;
		}
		}
		}

		// Set the rssi to the average of the current rssi and the previous rssi.
		if (bestRssi != UNREACHABLE_RSSI && mRssi != UNREACHABLE_RSSI) {
		@@ -1210,9 +1231,11 @@ public class AccessPoint implements Comparable<AccessPoint> {
		savedState.putInt(KEY_EAPTYPE, mEapType);
		if (mConfig != null) savedState.putParcelable(KEY_CONFIG, mConfig);
		savedState.putParcelable(KEY_WIFIINFO, mInfo);
		synchronized (mLock) {
		savedState.putParcelableArray(KEY_SCANRESULTS,
		mScanResults.toArray(new Parcelable[mScanResults.size()
		+ mExtraScanResults.size()]));
		}
		savedState.putParcelableArrayList(KEY_SCOREDNETWORKCACHE,
		new ArrayList<>(mScoredNetworkCache.values()));
		if (mNetworkInfo != null) {
		@@ -1291,8 +1314,10 @@ public class AccessPoint implements Comparable<AccessPoint> {
		}

		int oldLevel = getLevel();
		synchronized (mLock) {
		mScanResults.clear();
		mScanResults.addAll(scanResults);
		}
		updateBestRssiInfo();
		int newLevel = getLevel();

		@@ -1323,18 +1348,20 @@ public class AccessPoint implements Comparable<AccessPoint> {
		void setScanResultsPasspoint(
		@Nullable Collection<ScanResult> homeScans,
		@Nullable Collection<ScanResult> roamingScans) {
		synchronized (mLock) {
		mExtraScanResults.clear();
		if (!CollectionUtils.isEmpty(homeScans)) {
		mIsRoaming = false;
		if (!CollectionUtils.isEmpty(roamingScans)) {
		mExtraScanResults.addAll(roamingScans);
		}
		mIsRoaming = false;
		setScanResults(homeScans);
		} else if (!CollectionUtils.isEmpty(roamingScans)) {
		mIsRoaming = true;
		setScanResults(roamingScans);
		}
		}
		}

		/**
		* Attempt to update the AccessPoint with the current connection info.