Questions conserning connection_client

Aug 21, 2006 at 11:38pm

Questions conserning connection_client

I’m trying to set up a pair of externals that will be able to send and
receive messages in the same way send/receive do. The sending object I
have working fine, based on the typedmess function.

I would like the receiving object to be able to “listen” to symbols that
are shared with receive, so that messages sent by e.g. “send foo” are
received both by “receive foo” and my object with proper “foo” argument.
In order to achieve this I am attempting to use the connection_client
function described in the SDK chapter 9.

My first question is whether this will work at all, or if I have to find
another approach to the problem?

The second question conserns a compiling error in the traverse function.
At the moment the struct of the external looks like this:

typedef struct _receive{ // Data Structure for this
object
t_object ob; // REQUIRED: Our object
void *obex; // REQUIRED: Object
Extensions used by Jitter/Attribute stuff
t_symbol *bus; // Bus that communication
is passed along
struct myclient *c_next; // Link pointer for
connection_client
void *outlet; // Need one for each outlet
} t_receive;

The traverse function is more or less a copy and paste of the sample
method provided in the SDK:

// Traversing the list of clients
void *receive_traverse(t_receive *x, t_receive ***addr)
{
*addr = &x->c_next;
return (x->c_next);
}

When attempting to build the object I get the following error at the
line starting with *addr:

error: cannot convert ‘myclient**’ to ‘t_receive**’ in assignment

The error message definitively makes sense, so I am wondering if there
is a typo in the declaration of the traverse function in the SDK:

void *myobject_traverse(t_myobject *x, t_myobject ***ptr);

Should it instead be:

void *myobject_traverse(t_myobject *x, myclient ***ptr);

Any insight appreciated,
Trond

#27238

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