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make sure that the sync thread is protected by a consistent lock

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This commit is contained in:
Fred Quintana
2009-08-26 18:49:19 -07:00
committed by Debajit Ghosh
parent 42b1648212
commit 3cff76aaa8
1 changed files with 5 additions and 4 deletions
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9
core/java/android/content/AbstractThreadedSyncAdapter.java
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@@ -39,8 +39,9 @@ public abstract class AbstractThreadedSyncAdapter {
private final AtomicInteger mNumSyncStarts;
private final ISyncAdapterImpl mISyncAdapterImpl;
// all accesses to this member variable must be synchronized on "this"
// all accesses to this member variable must be synchronized on mSyncThreadLock
private SyncThread mSyncThread;
private final Object mSyncThreadLock = new Object();
/** Kernel event log tag. Also listed in data/etc/event-log-tags. */
public static final int LOG_SYNC_DETAILS = 2743;
@@ -71,7 +72,7 @@ public abstract class AbstractThreadedSyncAdapter {
boolean alreadyInProgress;
// synchronize to make sure that mSyncThread doesn't change between when we
// check it and when we use it
synchronized (this) {
synchronized (mSyncThreadLock) {
if (mSyncThread == null) {
if (mAutoInitialize
&& extras != null
@@ -102,7 +103,7 @@ public abstract class AbstractThreadedSyncAdapter {
public void cancelSync(ISyncContext syncContext) {
// synchronize to make sure that mSyncThread doesn't change between when we
// check it and when we use it
synchronized (this) {
synchronized (mSyncThreadLock) {
if (mSyncThread != null
&& mSyncThread.mSyncContext.getISyncContext() == syncContext) {
mSyncThread.interrupt();
@@ -158,7 +159,7 @@ public abstract class AbstractThreadedSyncAdapter {
}
// synchronize so that the assignment will be seen by other threads
// that also synchronize accesses to mSyncThread
synchronized (this) {
synchronized (mSyncThreadLock) {
mSyncThread = null;
}
}