implement run_loop_remove for cocoa

TODO.txt

@@ -1,9 +1,6 @@
 /* new todo file for BTstack */
 
 NEXT:
-- try to have BTdaemon use 0% cpu time when idle, after disconnect
-- implement cocoa_remove_data_source
-- fix BTstack and/or WiiMote Demo crash when quitting app
 - prepend all source files with 'new BSD' copyright header
   
 == Release Version 0.1

include/btstack/run_loop.h

@@ -24,7 +24,7 @@ typedef struct data_source {
 typedef struct timer {
     linked_item_t item; 
     struct timeval timeout;                             // <-- next timeout
-    void  (*process)(struct timer *ts);                  // <-- do processing
+    void  (*process)(struct timer *ts);                 // <-- do processing
 } timer_t;
 
 // init must be called before any other run_loop call

src/run_loop_cocoa.m

@@ -40,18 +40,19 @@ void cocoa_add_data_source(data_source_t *dataSource){
 										  socketDataCallback,
 										  &socketContext
     );
-	
+    // hack: store CFSocketRef in next pointer of linked_item
+    dataSource->item.next = (void *) socket;
+    
 	// create run loop source and add to run loop
 	CFRunLoopSourceRef socketRunLoop = CFSocketCreateRunLoopSource ( kCFAllocatorDefault, socket, 0);
 	CFRunLoopAddSource( CFRunLoopGetCurrent(), socketRunLoop, kCFRunLoopDefaultMode);
 }
 
 int  cocoa_remove_data_source(data_source_t *dataSource){
-	// not needed yet
-    fprintf(stderr, "WARNING: run_loop_remove_data_source not implemented yet!");
-    // warning never the less
+    CFRunLoopRemoveSource( CFRunLoopGetCurrent(), dataSource->item.next, kCFRunLoopCommonModes);
 	return 0;
 }
+
 void  cocoa_add_timer(timer_t * ts){
 	// not needed yet
    fprintf(stderr, "WARNING: run_loop_add_timer not implemented yet!");