Add lock around progress updates and cancel to iphone attempting to access zombie data

@@ -112,6 +112,9 @@
 	//This lock will block the request until the delegate supplies authentication info
 	NSConditionLock *authenticationLock;
 	
+	//This lock prevents the operation from being cancelled while it is trying to update the progress, and vice versa
+	NSLock *progressLock;
+	
 	//Called on the delegate when the request completes successfully
 	SEL didFinishSelector;
 	

@@ -85,6 +85,7 @@ static void ReadStreamClientCallBack(CFReadStreamRef readStream, CFStreamEventTy
 	[domain release];
 	[authenticationRealm release];
 	[url release];
+	[progressLock release];
 	[authenticationLock release];
 	[lastActivityTime release];
 	[responseCookies release];
@@ -118,6 +119,13 @@ static void ReadStreamClientCallBack(CFReadStreamRef readStream, CFStreamEventTy
 	return complete;
 }
 
+- (void)cancel
+{
+	[progressLock lock];
+	[super cancel];
+	[progressLock unlock];
+}
+
 - (int)totalBytesRead
 {
 	return totalBytesRead;
@@ -207,6 +215,9 @@ static void ReadStreamClientCallBack(CFReadStreamRef readStream, CFStreamEventTy
 {
 	CFRunLoopAddCommonMode(CFRunLoopGetCurrent(),ASIHTTPRequestRunMode);
 
+	[progressLock release];
+	progressLock = [[NSLock alloc] init];
+	
 	[authenticationLock release];
 	authenticationLock = [[NSConditionLock alloc] initWithCondition:1];
 	
@@ -321,8 +332,14 @@ static void ReadStreamClientCallBack(CFReadStreamRef readStream, CFStreamEventTy
 
 - (void)updateProgressIndicators
 {
+	[progressLock lock];
+	if ([self isCancelled]) {
+		[progressLock unlock];
+		return;
+	}
 	[self updateUploadProgress];
 	[self updateDownloadProgress];
+	[progressLock unlock];
 
 }
 

@@ -30,15 +30,17 @@
 					<object class="IBUILabel" id="602749642">
 						<reference key="NSNextResponder" ref="191373211"/>
 						<int key="NSvFlags">292</int>
-						<string key="NSFrame">{{20, 20}, {280, 105}}</string>
+						<string key="NSFrame">{{20, 20}, {280, 144}}</string>
 						<reference key="NSSuperview" ref="191373211"/>
 						<bool key="IBUIOpaque">NO</bool>
 						<bool key="IBUIClipsSubviews">YES</bool>
 						<bool key="IBUIUserInteractionEnabled">NO</bool>
 						<string type="base64-UTF8" key="IBUIText">RGVtb25zdHJhdGVzIGZldGNoaW5nIGEgd2ViIHBhZ2Ugc3luY2hyb25vdXNseSwgdGhlIEhUTUwgc291
 cmNlIHdpbGwgYXBwZWFyIGluIHRoZSBib3ggYmVsb3cgd2hlbiB0aGUgZG93bmxvYWQgaXMgY29tcGxl
-dGUuICBJbiByZWFsIHdvcmxkIHNpdHVhdGlvbnMsIHlvdSdkIGJlIG1vcmUgbGlrZWx5IHRvIHJ1biB0
-aGlzIGluIGEgdGhyZWFkLg</string>
+dGUuICBUaGUgaW50ZXJmYWNlIHdpbGwgbG9jayB1cCB3aGVuIHlvdSBwcmVzcyB0aGlzIGJ1dHRvbiB1
+bnRpbCB0aGUgb3BlcmF0aW9uIHRpbWVzIG91dCBvciBzdWNjZWVkcy4gSW4gcmVhbCB3b3JsZCBzaXR1
+YXRpb25zLCB5b3UnZCBiZSBtb3JlIGxpa2VseSB0byB1c2Ugc3luY2hyb25vdXMgcmVxdWVzdHMgaW4g
+YSB0aHJlYWQuA</string>
 						<object class="NSFont" key="IBUIFont" id="467718481">
 							<string key="NSName">Helvetica</string>
 							<double key="NSSize">1.400000e+01</double>
@@ -56,7 +58,7 @@ aGlzIGluIGEgdGhyZWFkLg</string>
 					<object class="IBUIButton" id="963091686">
 						<reference key="NSNextResponder" ref="191373211"/>
 						<int key="NSvFlags">292</int>
-						<string key="NSFrame">{{20, 133}, {72, 37}}</string>
+						<string key="NSFrame">{{20, 172}, {72, 37}}</string>
 						<reference key="NSSuperview" ref="191373211"/>
 						<bool key="IBUIOpaque">NO</bool>
 						<bool key="IBUIClearsContextBeforeDrawing">NO</bool>
@@ -84,7 +86,7 @@ aGlzIGluIGEgdGhyZWFkLg</string>
 					<object class="IBUITextView" id="251778509">
 						<reference key="NSNextResponder" ref="191373211"/>
 						<int key="NSvFlags">292</int>
-						<string key="NSFrame">{{20, 184}, {280, 187}}</string>
+						<string key="NSFrame">{{20, 217}, {280, 154}}</string>
 						<reference key="NSSuperview" ref="191373211"/>
 						<bool key="IBUIOpaque">NO</bool>
 						<bool key="IBUIClipsSubviews">YES</bool>