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Fix premature timeouts on tile read waits, causing missed tile loads

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This commit is contained in:
Mike Primm 2011-07-03 11:30:48 -05:00
parent 97ff6a2c2d
commit e724a7bccb
1 changed files with 12 additions and 8 deletions
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20
src/main/java/org/dynmap/utils/FileLockManager.java
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@ -72,7 +72,9 @@ public class FileLockManager {
String fn = f.getPath();
synchronized(lock) {
boolean got_lock = false;
boolean first_wait = true;
long starttime = 0;
if(timeout > 0)
starttime = System.currentTimeMillis();
while(!got_lock) {
Integer lockcnt = filelocks.get(fn); /* Get lock count */
if(lockcnt == null) {
@ -85,14 +87,16 @@ public class FileLockManager {
}
else { /* Write lock in place */
try {
if((timeout > 0) && (!first_wait)) { /* We already waited */
return false;
}
if(timeout < 0)
if(timeout < 0) {
lock.wait();
else
lock.wait(timeout);
first_wait = false;
}
else {
long now = System.currentTimeMillis();
long elapsed = now-starttime;
if(elapsed > timeout) /* Give up on timeout */
return false;
lock.wait(timeout-elapsed);
}
} catch (InterruptedException ix) {
Log.severe("getReadLock(" + fn + ") interrupted");
return false;