Ok, now things are a little bit clearer. However, when running my test code I
face the issue:
Creating object:
(process:45799): GLib-GObject-WARNING **: 15:52:57.565: specified instance size
for type 'AvModem' is smaller than the parent type's 'GObject' instance size
(process:45799): GLib-CRITICAL **: 15:52:57.565: g_once_init_leave: assertion
'result != 0' failed
(process:45799): GLib-GObject-CRITICAL **: 15:52:57.565:
g_object_new_with_properties: assertion 'G_TYPE_IS_OBJECT (object_type)' failed
(process:45799): GLib-GObject-CRITICAL **: 15:52:57.565: g_object_unref:
assertion 'G_IS_OBJECT (object)' failed
I guess I am missing some details about declaring MMObjectclass is my parent
class.
I can't understand them from the GObjects doc, even tough they seem pretty well
written, once you grasp the context.
With final type I was able to drop some code. Now my objecct skel looks as
follows:
/* header */
#ifndef __main_h__
#define __main_h__
#include <glib-object.h>
#include <libmm-glib.h>
G_BEGIN_DECLS
#define AV_TYPE_MODEM av_modem_get_type()
G_DECLARE_FINAL_TYPE(AvModem, av_modem, AV, MODEM, GObject)
AvModem *av_modem_new(void);
G_END_DECLS
#endif
/* source */
#include <glib.h>
#include <main.h>
#include <libmm-glib.h>
struct _AvModem {
MMObject *mmobject;
/* other members */
};
G_DEFINE_TYPE(AvModem, av_modem, G_TYPE_OBJECT)
static void av_modem_init(AvModem *self) {
g_print("%s invoked\n",__FUNCTION__);
/* here we would g_object_new and things */
/* initialize all public and private members to reasonable default
values.
* They are all automatically initialized to 0 to begin with. */
}
static void av_modem_dispose(GObject *gobject) {
g_print("%s invoked\n",__FUNCTION__);
/* In dispose(), you are supposed to free all types referenced from this
* object which might themselves hold a reference to self. Generally,
* the most simple solution is to unref all members on which you own a
* reference.
*/
/* time to g_object_clear things */
G_OBJECT_CLASS (av_modem_parent_class)->dispose (gobject);
}
static void av_modem_finalize(GObject *gobject) {
g_print("%s invoked\n",__FUNCTION__);
/* e.g.: g_free for filename */
G_OBJECT_CLASS (av_modem_parent_class)->finalize (gobject);
}
static void av_modem_class_init(AvModemClass *klass) {
g_print("%s invoked\n",__FUNCTION__);
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->dispose = av_modem_dispose;
object_class->finalize = av_modem_finalize;
}
AvModem *av_modem_new(void) {
AvModem *m;
m = g_object_new(AV_TYPE_MODEM, NULL);
return m;
}
gint main(void) {
AvModem *m;
g_print("Creating object:\n");
m = av_modem_new();
g_object_unref(m);
return 0;
}
It works if I use
MMObject m;
instead of *m as my _AvModem struct member, which is not the right solution I
know...
Second, the final objective is to have
AvModem *av_modem_new(MMObject *m);
And I guess inside the function I can use a simple assignment due to the fact
the compiler still knows the structure in the C file.
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