29 Jun
2010
29 Jun
'10
3:31 p.m.
Hello Andrei,
Thanks for getting back to me on this one.
Here's a pseudocode example.
Let's assume that we have module a and module b.
We have an rpc call into module a to print out some info.
Module b has some relevant info that we would like to print out during
the rpc call into module a.
inside module a we have:
static void module_a_print_info(rpc_t *rpc, void *c) {
/*declare a variable to pass rpc stuf up to module b */
rpc_cb_ctx_t *rpc_cb;
/* print stuff related to module a */
rpc->printf(c, "module a stuff ....");
/*let's print stuf from mudule b now via a callback */
rpc_cb->rpc = rpc;
rpc_cb->c = c;
run_callback_into_module_b( ...., (void *)rpc_cb);
}
inside module b, we have the callback:
void module_b_callback_function(...., struct
module_b_generic_callback_param *param)
/* extract rpc and c via the generic module_b_generic_callback_param */
rpc_cb_ctx_t* rpc_cb = (rpc_cb_ctx_t*)(param);
rpc_t *rpc = rpc_cb->rpc;
void *c = rpc_cb->c;
rpc->printf(c, "module b stuff ....");
}
Hope that the above pseudocode explains what I want to achieve.
There is no impact on the core, all I want is to declare the
rpc_cb_ctx_t structure into the rpc.h in order to make it available in
an atomic way to both module a and b.
The real modules are:
- module a: modules_k/dialog (dialog.c:internal_rpc_print_dlg)
- module b: modules_k/qos (qos_handlers.c:qos_dialog_rpc_context_CB)
Regards,
Ovidiu Sas
On Tue, Jun 29, 2010 at 5:08 AM, Andrei Pelinescu-Onciul
<andrei(a)iptel.org> wrote:
On Jun 28, 2010 at 17:55, Ovidiu Sas
<osas(a)voipembedded.com> wrote:
So ... are there any objections of defining the
rpc_cb_ctx_t typedef
inside rpc.h?
I'm not sure I understand what it's needed for and what impact will it
have on existing code. If it means changing the existing interface, then
a lot of code would have to be updated and I wouldn't agree with it,
particularly very close to a code freeze.
Could you come up with a small code/pseudo-code example?
From your description I don't understand why you need to pack
rpc_t and c (I assume c is here the rpc context) in a structure, since
every rpc "callback" already gets both of them as parameters.
Andrei
Thanks,
Ovidiu Sas
On Sat, Jun 26, 2010 at 9:13 AM, Ovidiu Sas <osas(a)voipembedded.com> wrote:
Hello all,
I need to pass the rpc printf params between two modules via a
callback functions.
The current implementation allows passing a pointer during the
callback call and I would like to reuse the existing callback pointer
to pass a everything that I need through it.
I would like to define a new structure for rpc and pass a pointer to
that structure during the callback call:
diff --git a/rpc.h b/rpc.h
index 1434146..ff66b5a 100644
--- a/rpc.h
+++ b/rpc.h
@@ -88,6 +88,10 @@ typedef struct rpc_delayed_ctx{
/* more private data might follow */
} rpc_delayed_ctx_t;
+typedef struct rpc_cb_ctx {
+ rpc_t *rpc;
+ void *c;
+} rpc_cb_ctx_t;
/*
* RPC Function Prototype
This will allow printing mixed info from different modules, in my
particular case, printing qos context info along with dialog context
info (modules_k: dialog and qos).
Since I'm not familiar with the rpc interface, please advice if this
is the right way of doing it or if there is another better
alternative.
Regards,
Ovidiu Sas
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