MacFreeRDP cli fixes:

- added ErrorInfo handling.
- Showing alert message on main thread.
- Autorelease pool for background thread.

client/Mac/MRDPView.m

@@ -148,6 +148,8 @@ struct rgba_data
 
 DWORD mac_client_thread(void* param)
 {
+	@autoreleasepool
+	{
 		int status;
 		HANDLE events[4];
 		HANDLE input_event;
@@ -225,6 +227,7 @@ DWORD mac_client_thread(void* param)
 		
 		ExitThread(0);
 		return 0;
+	}
 }
 
 /************************************************************************

client/Mac/cli/AppDelegate.h

@@ -18,7 +18,7 @@
 	MRDPView* mrdpView;
 }
 
-- (void) rdpConnectError;
+- (void) rdpConnectError: (NSString*) customMessage;
 
 @property (assign) IBOutlet NSWindow *window;
 @property (assign) rdpContext *context;

client/Mac/cli/AppDelegate.m

@@ -13,6 +13,7 @@
 static AppDelegate* _singleDelegate = nil;
 void AppDelegate_EmbedWindowEventHandler(void* context, EmbedWindowEventArgs* e);
 void AppDelegate_ConnectionResultEventHandler(void* context, ConnectionResultEventArgs* e);
+void AppDelegate_ErrorInfoEventHandler(void* ctx, ErrorInfoEventArgs* e);
 
 @implementation AppDelegate
 
@@ -46,6 +47,7 @@ void AppDelegate_ConnectionResultEventHandler(void* context, ConnectionResultEve
 	else
 	{
 		PubSub_SubscribeConnectionResult(context->pubSub, AppDelegate_ConnectionResultEventHandler);
+		PubSub_SubscribeErrorInfo(context->pubSub, AppDelegate_ErrorInfoEventHandler);
 		PubSub_SubscribeEmbedWindow(context->pubSub, AppDelegate_EmbedWindowEventHandler);
 		
 		freerdp_client_start(context);
@@ -113,18 +115,12 @@ void AppDelegate_ConnectionResultEventHandler(void* context, ConnectionResultEve
 
 
 /** *********************************************************************
- * called when we fail to connect to a RDP server
+ * called when we fail to connect to a RDP server - Make sure this is called from the main thread.
  ***********************************************************************/
 
-- (void) rdpConnectError
+- (void) rdpConnectError : (NSString*) withMessage
 {
-	// TODO: This should be called on the main thread
-	
-	NSString* message = @"Error connecting to server";
-	if (connectErrorCode == AUTHENTICATIONERROR)
-	{
-		message = [NSString stringWithFormat:@"%@:\n%@", message, @"Authentication failure, check credentials."];
-	}
+	NSString* message = withMessage ? withMessage : @"Error connecting to server";
 
 	NSAlert *alert = [[NSAlert alloc] init];
 	[alert setMessageText:message];
@@ -169,11 +165,40 @@ void AppDelegate_EmbedWindowEventHandler(void* ctx, EmbedWindowEventArgs* e)
 
 void AppDelegate_ConnectionResultEventHandler(void* ctx, ConnectionResultEventArgs* e)
 {
+	NSLog(@"ConnectionResult event result:%d\n", e->result);
 	if (_singleDelegate)
 	{
 		if (e->result != 0)
 		{
-			[_singleDelegate rdpConnectError];
+			NSString* message = nil;
+			if (connectErrorCode == AUTHENTICATIONERROR)
+			{
+				message = [NSString stringWithFormat:@"%@:\n%@", message, @"Authentication failure, check credentials."];
+			}
+			
+			
+			// Making sure this should be invoked on the main UI thread.
+			[_singleDelegate performSelectorOnMainThread:@selector(rdpConnectError:) withObject:message waitUntilDone:FALSE];
+			[message release];
 		}
 	}
 }
+
+void AppDelegate_ErrorInfoEventHandler(void* ctx, ErrorInfoEventArgs* e)
+{
+	NSLog(@"ErrorInfo event code:%d\n", e->code);
+	if (_singleDelegate)
+	{
+		// Retrieve error message associated with error code
+		NSString* message = nil;
+		if (e->code != ERRINFO_NONE)
+		{
+			const char* errorMessage = freerdp_get_error_info_string(e->code);
+			message = [[NSString alloc] initWithUTF8String:errorMessage];
+		}
+		
+		// Making sure this should be invoked on the main UI thread.
+		[_singleDelegate performSelectorOnMainThread:@selector(rdpConnectError:) withObject:message waitUntilDone:TRUE];
+		[message release];
+	}
+}