AsyncResult: Add get_source_object_base(), deprecating get_source_object().

* gio/asyncresult.[hg|ccg]: Deprecate get_source_object(), replacing it
with get_source_object_base(), because in giomm, the C++ wrapper object
might be a Glib::Interface, but not a Glib::Object (though the underlying
C instance must be a GObject). This happens if giomm does not know about
the GType of the underlying C Object, which is a legitimate situation.
* tests/giomm_asyncresult_sourceobject/main.cc: Added this test case
from Michael Hasselmann, from bug #608269.

1 files changed, 30 insertions, 0 deletions

diff --git a/tests/giomm_asyncresult_sourceobject/main.cc b/tests/giomm_asyncresult_sourceobject/main.cc
new file mode 100644
index 00000000..1c9f1a15
--- /dev/null
+++ b/tests/giomm_asyncresult_sourceobject/main.cc
@@ -0,0 +1,30 @@
+#include <giomm.h>
+#include <iostream>
+
+void on_read_async(const Glib::RefPtr<Gio::AsyncResult>& result)
+{
+  std::cout << "Testing result ... "
+            << (result ? "OK!" : "FAILED!") << std::endl;
+
+  std::cout << "Testing get_source_object from gobj() ... "
+            << (g_async_result_get_source_object(result->gobj()) ? "OK!" : "FAILED!") << std::endl;
+
+  std::cout << "Testing Gio::AsyncResult's get_source_object ... "
+            << (result->get_source_object_base() ? "OK!" : "FAILED!") << std::endl;
+
+  exit(EXIT_SUCCESS);
+}
+
+int main(int, char**)
+{
+  Glib::init();
+  Gio::init();
+
+  Glib::RefPtr<Glib::MainLoop> mainloop = Glib::MainLoop::create();
+
+  Glib::RefPtr<Gio::File> file = Gio::File::create_for_path("/etc/passwd");
+  file->read_async(&on_read_async);
+
+  mainloop->run();
+  return 0;
+}