We call g_object_weak_release_all() at two places. Once right before finalize(). At this point, the object is definitely going to be destroyed, and the user must no longer resurrect it or subscribe new weak notifications. In that case, we really want to notify/release all weak notifications. However, we also call it from g_object_real_dispose(). During dispose, the API allows the user to resurrect an object. Granted, that is probably not something anybody should do, but GObject makes a reasonable attempt to support that. A possible place to resurrect (and subscribe new weak notifications) is when GObject calls g_object_real_dispose(). static void g_object_real_dispose (GObject *object) { g_signal_handlers_destroy (object); /* GWeakNotify and GClosure can call into user code */ g_object_weak_release_all (object); closure_array_destroy_all (object); } But previously, g_object_weak_release_all() would continue iterating until there are no more weak notifications left. So while the user can take a strong reference and resurrect the object, their attempts to register new weak notifications are thwarted. Instead, when the loop in g_object_weak_release_all() starts, remember the initial number of weak notifications, and don't release more than that. Note that WeakRefStack preserves the order of entries, so by maintaining the "remaining_to_notify" counter we know when to stop. Note that this brings also an earlier behavior back, where we would call g_datalist_id_set_data (&object->qdata, quark_weak_notifies, NULL); This would take out the entire WeakRefStack at once and notify the weak notifications registered at the time. But subsequent registrations would not be released/notified yet.
GLib
GLib is the low-level core library that forms the basis for projects such as GTK and GNOME. It provides data structure handling for C, portability wrappers, and interfaces for such runtime functionality as an event loop, threads, dynamic loading, and an object system.
The official download locations are: https://download.gnome.org/sources/glib
The official web site is: https://www.gtk.org/
Installation
See the file ‘INSTALL.md’. There is separate and more in-depth documentation for building GLib on Windows.
Supported versions
Upstream GLib only supports the most recent stable release series, the previous stable release series, and the current development release series. All older versions are not supported upstream and may contain bugs, some of which may be exploitable security vulnerabilities.
See SECURITY.md for more details.
Documentation
API documentation is available online for GLib for the:
Discussion
If you have a question about how to use GLib, seek help on GNOME’s Discourse
instance. Alternatively, ask a question
on StackOverflow and tag it glib
.
Reporting bugs
Bugs should be reported to the GNOME issue tracking system. You will need to create an account for yourself. You may also submit bugs by e-mail (without an account) by e-mailing incoming+gnome-glib-658-issue-@gitlab.gnome.org, but this will give you a degraded experience.
Bugs are for reporting problems in GLib itself, not for asking questions about how to use it. To ask questions, use one of our discussion forums.
In bug reports please include:
- Information about your system. For instance:
- What operating system and version
- For Linux, what version of the C library
- And anything else you think is relevant.
- How to reproduce the bug.
- If you can reproduce it with one of the test programs that are built
in the
tests/
subdirectory, that will be most convenient. Otherwise, please include a short test program that exhibits the behavior. As a last resort, you can also provide a pointer to a larger piece of software that can be downloaded.
- If you can reproduce it with one of the test programs that are built
in the
- If the bug was a crash, the exact text that was printed out when the crash occurred.
- Further information such as stack traces may be useful, but is not necessary.
Contributing to GLib
Please follow the contribution guide to know how to start contributing to GLib.
Patches should be submitted as merge requests to gitlab.gnome.org. Note that you will need to be logged in to the site to use this page. If the patch fixes an existing issue, please refer to the issue in your commit message with the following notation (for issue 123):
Closes: #123
Otherwise, create a new merge request that introduces the change. Filing a separate issue is not required.