luc14n0/glib
1
0
Fork 0
mirror of https://gitlab.gnome.org/GNOME/glib.git synced 2025-08-02 15:33:39 +02:00
Code Issues Packages Projects Releases Wiki Activity

gio/cancellable: Always add reference while emitting cancelled signal

Browse Source 
When a non-cancelled cancellable ::cancelled signal callback is called
the cancellable has enough references so that it can be unreferenced on
the callback itself. However this doesn't happen if the cancellable has
been already cancelled at the moment we connect to it.

To prevent this, add a temporary reference before calling the signal
callback.

Note that we do this also if the callback has not been already cancelled
to prevent that we may end up calling a toggle-notify callback while we
are locked.

Add tests

Closes: #3643
This commit is contained in:
Marco Trevisan (Treviño)
2025-04-02 19:18:27 +02:00
parent 7432441581
commit 49680afd5c
2 changed files with 32 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
gio/tests/cancellable.c
View File

@@ -909,6 +909,25 @@ test_connect_to_disposing_callback (void)
g_assert_null (cancellable);
}
static void
test_connect_cancelled_to_disposing_callback (void)
{
GCancellable *cancellable;
gulong id;
g_test_summary ("A cancellable signal callback can unref the cancellable");
g_test_bug ("https://gitlab.gnome.org/GNOME/glib/-/issues/3643");
cancellable = g_cancellable_new ();
g_object_add_weak_pointer (G_OBJECT (cancellable), (gpointer *) &cancellable);
g_cancellable_cancel (cancellable);
id = g_cancellable_connect (cancellable, G_CALLBACK (assert_references_and_unref),
GINT_TO_POINTER (2), NULL);
g_assert_cmpuint (id, ==, 0);
g_assert_null (cancellable);
}
int
main (int argc, char *argv[])
{
@@ -917,6 +936,7 @@ main (int argc, char *argv[])
g_test_add_func ("/cancellable/multiple-concurrent", test_cancel_multiple_concurrent);
g_test_add_func ("/cancellable/null", test_cancel_null);
g_test_add_func ("/cancellable/connect-to-disposing-callback", test_connect_to_disposing_callback);
g_test_add_func ("/cancellable/connect-cancelled-to-disposing-callback", test_connect_cancelled_to_disposing_callback);
g_test_add_func ("/cancellable/disconnect-on-cancelled-callback-hangs", test_cancellable_disconnect_on_cancelled_callback_hangs);
g_test_add_func ("/cancellable/resets-on-cancel-callback-hangs", test_cancellable_reset_on_cancelled_callback_hangs);
g_test_add_func ("/cancellable/poll-fd", test_cancellable_poll_fd);