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21a73df1b5
* configure.in: Add glib/examples. * glib/Makefile.am: Add examples/ * glib/examples/.cvsignore * glib/examples/Makefile.am * glib/examples/example-client.c * glib/examples/example-service.c * glib/examples/example-service.xml * glib/examples/example-signal-emitter.c * glib/examples/example-signal-emitter.xml * glib/examples/example-signal-recipient.c: New files; GLib binding examples, ported from python/examples.
103 lines
2.7 KiB
C
103 lines
2.7 KiB
C
#include <dbus/dbus-glib.h>
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#include <stdio.h>
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#include <stdlib.h>
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static void lose (const char *fmt, ...) G_GNUC_NORETURN G_GNUC_PRINTF (1, 2);
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static void lose_gerror (const char *prefix, GError *error) G_GNUC_NORETURN;
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static void
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lose (const char *str, ...)
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{
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va_list args;
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va_start (args, str);
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vfprintf (stderr, str, args);
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fputc ('\n', stderr);
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va_end (args);
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exit (1);
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}
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static void
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lose_gerror (const char *prefix, GError *error)
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{
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lose ("%s: %s", prefix, error->message);
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}
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static gboolean
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emit_signal (gpointer arg)
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{
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DBusGProxy *proxy = arg;
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dbus_g_proxy_call_no_reply (proxy, "emitHelloSignal", G_TYPE_INVALID);
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return TRUE;
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}
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static void
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hello_signal_handler (DBusGProxy *proxy, const char *hello_string, gpointer user_data)
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{
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printf ("Received signal and it says: %s\n", hello_string);
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}
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int
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main (int argc, char **argv)
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{
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DBusGConnection *bus;
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DBusGProxy *remote_object;
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GError *error = NULL;
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GMainLoop *mainloop;
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g_type_init ();
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mainloop = g_main_loop_new (NULL, FALSE);
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bus = dbus_g_bus_get (DBUS_BUS_SESSION, &error);
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if (!bus)
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lose_gerror ("Couldn't connect to session bus", error);
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/* We use _for_name_owner in order to track this particular service
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* instance, which lets us receive signals.
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*/
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remote_object = dbus_g_proxy_new_for_name_owner (bus,
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"org.designfu.TestService",
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"/org/designfu/TestService/object",
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"org.designfu.TestService",
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&error);
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if (!remote_object)
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lose_gerror ("Failed to get name owner", error);
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/* IMPORTANT:
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*
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* Note because this signal's signature is VOID__STRING, we do not
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* need to register a marshaller, since there is a builtin one.
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* However for other signatures, you must generate a marshaller,
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* then call dbus_g_object_register_marshaller. It would look like
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* this:
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*
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* dbus_g_object_register_marshaller (g_cclosure_marshal_VOID__STRING, G_TYPE_NONE, G_TYPE_STRING, G_TYPE_INVALID);
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*
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*/
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/* Tell DBus what the type signature of the signal callback is; this
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* allows us to sanity-check incoming messages before invoking the
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* callback. You need to do this once for each proxy you create,
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* not every time you want to connect to the signal.
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*/
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dbus_g_proxy_add_signal (remote_object, "HelloSignal", G_TYPE_STRING, G_TYPE_INVALID);
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/* Actually connect to the signal. Note you can call
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* dbus_g_proxy_connect_signal multiple times for one invocation of
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* dbus_g_proxy_add_signal.
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*/
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dbus_g_proxy_connect_signal (remote_object, "HelloSignal", G_CALLBACK (hello_signal_handler),
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NULL, NULL);
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g_timeout_add (2000, emit_signal, remote_object);
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g_main_loop_run (mainloop);
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exit (0);
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}
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