Updated playlistLoader to be CONCURRENT! Mwahahaha!

total time is now automatically updated by observing PlaylistController.arrangedObjects.length

Playlist/PlaylistController.m

@@ -73,6 +73,7 @@
 	[super awakeFromNib];
 
 	[self addObserver:self forKeyPath:@"arrangedObjects" options:(NSKeyValueObservingOptionNew | NSKeyValueObservingOptionOld) context:nil];
+	[self addObserver:self forKeyPath:@"arrangedObjects.length" options:(NSKeyValueObservingOptionNew | NSKeyValueObservingOptionOld) context:nil];
 }
 
 - (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context
@@ -82,6 +83,10 @@
 		[self updatePlaylistIndexes];
 		[self updateTotalTime];
 	}
+	else if ([keyPath isEqualToString:@"length"])
+	{
+		[self updateTotalTime];
+	}
 }
 
 - (void)updatePlaylistIndexes

Playlist/PlaylistLoader.m

@@ -271,27 +271,23 @@
     NSOperationQueue *queue;
     queue = [[[NSApplication sharedApplication] delegate] sharedOperationQueue];
     
-    NSInvocationOperation *oldReadEntryInfoOperation = Nil;
     for (PlaylistEntry *pe in entries)
     {
         NSInvocationOperation *readEntryInfoOperation;
-        readEntryInfoOperation = [[[NSInvocationOperation alloc]
+        readEntryInfoOperation = [[NSInvocationOperation alloc]
                                     initWithTarget:self
                                           selector:@selector(readEntryInfo:)
-                                            object:pe]autorelease];
-        if (oldReadEntryInfoOperation)
-        {
-            [readEntryInfoOperation addDependency:oldReadEntryInfoOperation];
-            [oldReadEntryInfoOperation release];
-        }
+                                            object:pe];
+
         [readEntryInfoOperation addObserver:self
                                  forKeyPath:@"isFinished"
                                     options:NSKeyValueObservingOptionNew
                                     context:NULL];
         [queue addOperation:readEntryInfoOperation];
-        oldReadEntryInfoOperation = [readEntryInfoOperation retain];
+		
+		[readEntryInfoOperation release];
     }
-    [oldReadEntryInfoOperation release];
+
 	return;
 }
 
@@ -323,7 +319,6 @@
     else
     {
         [pe setValuesForKeysWithDictionary:entryInfo];
-        [playlistController updateTotalTime];
     }
     return;
 }
@@ -339,6 +334,7 @@
         // stop observing
         [object removeObserver:self forKeyPath:keyPath];
         [self performSelectorOnMainThread:@selector(processEntryInfo:) withObject:object waitUntilDone:NO];  
+		
     }
     else
     {