[launchd-dev] The MachService key

[Damien Sorresso]

On Nov 23, 2011, at 10:28 AM, Damien Sorresso wrote:
> On Nov 22, 2011, at 10:07 PM, Jerry Krinock wrote:
>>       // Set an Event Handler
>>       xpc_connection_set_event_handler(listener, ^(xpc_object_t object) {
>>           char* desc = xpc_copy_description(object);
>>           NSLog(@"MachServiceDemo Server got connection: %s", desc) ;
>>           xpc_connection_set_event_handler(listener, ^(xpc_object_t object) {
>>               char* desc = xpc_copy_description(object);
>>               NSLog(@"MachServiceDemo Server got message: %s", desc) ;
>>               free(desc) ;
>>           }) ;
>>       }) ;
>>       xpc_connection_resume(listener) ;
> 
> That inner xpc_connection_set_event_handler(3) should target 'object' (the new incoming connection), not 'listener'. 

Oh, and you also need to resume 'object'.

> xpc_connection_set_event_handler(listener, ^(xpc_object_t peer) {
> 	assert(xpc_get_type(peer) == XPC_TYPE_CONNECTION);
> 	xpc_connection_set_event_handler(peer, ^(xpc_object_t event) {
> 		if (event == XPC_ERROR_CONNECTION_INVALID) {
> 			// Peer has gone away.
> 		} else {
> 			assert(xpc_get_type(event) == XPC_TYPE_DICTIONARY);
> 			// Handle message.
> 		}
> 	});
> 	xpc_connection_resume(peer);
> });

Hope this helps. I highly recommend checking out the man pages.

$ man xpc
-- 
Damien Sorresso
dsorresso at apple.com