Previously, this would loop as long as read() got the expected number of
bytes back, which is 8. That means every successful read() of the eventfd
would perform an additional syscall() as a followup.
This is not ideal because eventfd (unless used as an EFD_SEMAPHORE) will
reset the counter as part of the read(). So that means that we either do
an additional throw-away syscall() or potentially race against a producer
generating new events before this change.
Currently the GSourceList has it's own allocation plus a secondary
allocation for the GList which contains it (from GMainContext). Not only
are these a pointer chase, but they are on separate cachelines too. Without
changing the code much we can at least keep things on the same cacheline
so that the pointer chase matters less.
Since the GList becomes embedded in the GSourceList you can use a
g_queue_unlink() directly removing the link without traversing the GList
like was done before.
Furthermore, we can simplify some code with g_queue_push_tail_link()
instead of some extra branching.
I'm not aware of any platforms where this is a problem in practice, but
it's definitely nonportable and doesn't hurt to document it.
I wonder about CHERI....
This should not result in any functional changes, but will eventually
allow glib to be functional on CHERI-enabled systems such as Morello.
Helps: https://gitlab.gnome.org/GNOME/glib/-/issues/2842
These functions can be used to initalize pointer-type variables rather
than a gsize. This is required to support CHERI-enabled platforms where
gsize cannot be used to store pointers. Follow-up changes will migrate
the uses of g_once_init that store pointers to the new API
Helps: https://gitlab.gnome.org/GNOME/glib/-/issues/2842
One test key was serving two purposes, which meant tests for it couldn’t
be separated out. It was testing escape-at-end-of-line and also
invalid-escape.
Signed-off-by: Philip Withnall <pwithnall@endlessos.org>
Helps: #3098
This reverts commit 4a96727642.
It was a temporary workaround to prevent disruption to apps late on in
the 2.78 cycle. Since we’re now early in the 2.80 cycle, let’s revert
the workaround and allow apps more time to fix their error handling for
`GKeyFile`.
Fixes: #3098
Commit 0b114b2687 accidentally made the
tests only pass on systems running in a UTC timezone, as it checked the
local timezone `%Z` format against `UTC`.
This happens to pass on all the GLib CI runners except the macOS one,
which is running under CET.
Make the formatting tests timezone-independent by running them with UTC
datetimes. There’s already a separate test for checking that `%Z` works
correctly in a non-UTC timezone (`test_z`).
Signed-off-by: Philip Withnall <pwithnall@endlessos.org>
See: https://gitlab.gnome.org/GNOME/glib/-/merge_requests/3611#note_1859208
It’s not actually needed on any platform, and causes compilation
problems on platforms where it’s not available.
Signed-off-by: Philip Withnall <pwithnall@endlessos.org>
Fixes: #3111
The Comment field provides a user-visible description of the app,
which usually contains generic words ("and", "or", "not", "is", ...)
that add noise when used for search.
It made some sense to match against the field as a fallback for
Keywords, before that key was well established. However that key
has been around for years now, so hopefully every app where additional
terms are helpful uses it by now.
With that, the downside of added noise outweighs the benefit, so
it's time to stop matching on comments.
POSIX allows dlclose() implementations that are no-ops,
and in such case library destructors run at application
exit rather than dlclose().
That's the case, for example, of UNIX systems with the
Musl LibC.
If you take a release build (--buildtype=release) previously of GLib,
functions such as g_type_create_instance() would call out to
g_type_test_flags() which you can see by disassembling and looking for the
call instruction to <g_type_test_flags> via the library ABI.
Now that the previous commit allows checking abstract and deprecated flags
it makes sense to let the compiler optimize those checks into a single
pass. This is only possible if the functions themselves are inlined.
Additionally, any time we have the same TypeNode we would want to be able
to reuse that node rather than re-locate it.
Every call to g_type_create_instance() currently will incur a RWLock at
least once, but usually twice to test for both G_TYPE_FLAG_ABSTRACT and
G_TYPE_FLAG_DEPRECATED.
Additionally, each call to g_type_instance_free() also checks for these.
That results in a synchronization of GTypeInstance creation across all
threads as well as being a huge amount of overhead when creating instances
like GskRenderNode.
With this patch in place, the next two biggest issues are
g_type_class_ref() and g_type_test_flags() not getting inlined within
gtype.c in release builds. We can address that separately though.
Sysprof shows that the RWLock, with this patch in place, falls off the
profiles.
