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Use ReentrantReadWriteLock in ExpandableBinaryDictionary.

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Bug: 6669677

Change-Id: I2acde0517d5ed5cbd7b7149709e35fc36651335d
This commit is contained in:
Keisuke Kuroynagi 2013-07-03 19:46:08 +09:00
parent d365d82d51
commit 0b1c08bf5a
1 changed files with 18 additions and 15 deletions
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33
java/src/com/android/inputmethod/latin/ExpandableBinaryDictionary.java
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@ -35,7 +35,7 @@ import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.concurrent.locks.ReentrantLock;
import java.util.concurrent.locks.ReentrantReadWriteLock;
/**
* Abstract base class for an expandable dictionary that can be created and updated dynamically
@ -151,14 +151,14 @@ abstract public class ExpandableBinaryDictionary extends Dictionary {
@Override
public void close() {
// Ensure that no other threads are accessing the local binary dictionary.
mLocalDictionaryController.lock();
mLocalDictionaryController.writeLock().lock();
try {
if (mBinaryDictionary != null) {
mBinaryDictionary.close();
mBinaryDictionary = null;
}
} finally {
mLocalDictionaryController.unlock();
mLocalDictionaryController.writeLock().unlock();
}
}
@ -205,14 +205,14 @@ abstract public class ExpandableBinaryDictionary extends Dictionary {
final String prevWord, final ProximityInfo proximityInfo,
final boolean blockOffensiveWords) {
asyncReloadDictionaryIfRequired();
if (mLocalDictionaryController.tryLock()) {
if (mLocalDictionaryController.readLock().tryLock()) {
try {
if (mBinaryDictionary != null) {
return mBinaryDictionary.getSuggestions(composer, prevWord, proximityInfo,
blockOffensiveWords);
}
} finally {
mLocalDictionaryController.unlock();
mLocalDictionaryController.readLock().unlock();
}
}
return null;
@ -225,11 +225,11 @@ abstract public class ExpandableBinaryDictionary extends Dictionary {
}
protected boolean isValidWordInner(final String word) {
if (mLocalDictionaryController.tryLock()) {
if (mLocalDictionaryController.readLock().tryLock()) {
try {
return isValidWordLocked(word);
} finally {
mLocalDictionaryController.unlock();
mLocalDictionaryController.readLock().unlock();
}
}
return false;
@ -246,11 +246,11 @@ abstract public class ExpandableBinaryDictionary extends Dictionary {
}
protected boolean isValidBigramInner(final String word1, final String word2) {
if (mLocalDictionaryController.tryLock()) {
if (mLocalDictionaryController.readLock().tryLock()) {
try {
return isValidBigramLocked(word1, word2);
} finally {
mLocalDictionaryController.unlock();
mLocalDictionaryController.readLock().unlock();
}
}
return false;
@ -293,9 +293,12 @@ abstract public class ExpandableBinaryDictionary extends Dictionary {
// Ensure all threads accessing the current dictionary have finished before swapping in
// the new one.
final BinaryDictionary oldBinaryDictionary = mBinaryDictionary;
mLocalDictionaryController.lock();
mBinaryDictionary = newBinaryDictionary;
mLocalDictionaryController.unlock();
mLocalDictionaryController.writeLock().lock();
try {
mBinaryDictionary = newBinaryDictionary;
} finally {
mLocalDictionaryController.writeLock().unlock();
}
oldBinaryDictionary.close();
} else {
mBinaryDictionary = newBinaryDictionary;
@ -390,7 +393,7 @@ abstract public class ExpandableBinaryDictionary extends Dictionary {
private final void syncReloadDictionaryInternal() {
// Ensure that only one thread attempts to read or write to the shared binary dictionary
// file at the same time.
mSharedDictionaryController.lock();
mSharedDictionaryController.writeLock().lock();
try {
final long time = SystemClock.uptimeMillis();
final boolean dictionaryFileExists = dictionaryFileExists();
@ -424,7 +427,7 @@ abstract public class ExpandableBinaryDictionary extends Dictionary {
}
mLocalDictionaryController.mLastUpdateTime = time;
} finally {
mSharedDictionaryController.unlock();
mSharedDictionaryController.writeLock().unlock();
}
}
@ -449,7 +452,7 @@ abstract public class ExpandableBinaryDictionary extends Dictionary {
* dictionary is out of date. Can be shared across multiple dictionary instances that access the
* same filename.
*/
private static class DictionaryController extends ReentrantLock {
private static class DictionaryController extends ReentrantReadWriteLock {
private volatile long mLastUpdateTime = 0;
private volatile long mLastUpdateRequestTime = 0;