Since instance private data is now always at a constant offset to the
instance pointer, we can add an accessor for it that doesn't also
require an instance.
The idea is that classes can call this from their class_init and store
it in a file-scoped static variable and use that to find their private
data on instances very quickly, without a priv pointer.
https://bugzilla.gnome.org/show_bug.cgi?id=698056
This reverts commit ddb0ce1421.
Colin's smoke testing has found issues in at least gjs and
gnome-settings-daemon. We'll need to see if we can address those.
GObject has previously allowed installing properties after class_init
has finished running. This means that you could install some of your
own properties on G_TYPE_OBJECT, for example, although they wouldn't
have worked properly.
Prevent this from happening. Require that all properties are installed by
the time class_init has finished.
Complaints go to this bug:
https://bugzilla.gnome.org/show_bug.cgi?id=698614
Classically, a GTypeInstance has had the following layout:
[[[[GTypeInstance] GObject] TypeA] TypeB] [TypeAPrivate] [TypeBPrivate]
where TypeB is a subclass of TypeA which is a GObject. Both TypeA and
TypeB use pivate data.
The main problem with this approach is that the offset between a pointer
to an instance of TypeA and the TypeAPrivate is not constant: it changes
depending on the depth of derivation and the size of the instance
structures of the derived types. For example, changing the size of the
TypeB structure in the above example would push the TypeAPrivate further
along.
This complicates the implementation of g_type_instance_get_private().
In particular, during object construction when the class pointer to the
'complete type' of the object is not yet stored in the header of the
GTypeInstance, we need a lookup table in order to be able to implement
g_type_instance_get_private() accurately.
We can avoid this problem by storing the private data before the
structures, in reverse order, like so:
[TypeBPrivate] [TypeAPrivate] [[[[GTypeInstance] GObject] TypeA] TypeB]
Now the distance between TypeA and TypeAPrivate depends only on the size
of GObject and GTypeInstance, which are static. Even in the case of
TypeB, the distance is not statically known but can be determined at
runtime and is constant (because we will know the size of TypeAPrivate
by the time we initialise TypeB and it won't change).
This approach requires a slighty dirty trick: allocating extra memory
_before_ the pointer we return from g_type_create_instance(). The main
problem with this is that it will cause valgrind to behave very badly,
reporting almost everything as "possibly lost".
We can correct for this by including a few valgrind client requests in
order to inform it that the start of the GTypeInstance should be
considered a block of memory and that pointers to it should mean that
this block is reachable. In order to make the private data reachable,
we also declare it as a block and include an extra pointer from the end
of the primary block pointing back at it. All of this is only done if
we are running under Valgrind.
https://bugzilla.gnome.org/show_bug.cgi?id=698595
gtk# also has a problem with the new interface-after-init restriction
that nobody noticed until now. Add an exception for them as well so
that they have a cycle or so to sort things out.
https://bugzilla.gnome.org/show_bug.cgi?id=687659
glibmm has a pretty difficult-to-solve problem caused by our recent
change to deny addition of interfaces to classes after initialisation.
They're looking for a long-term workaround for the problem, but in the
meantime we can allow the registration to succeed (with warning) if the
class looks like it's being defined by gtkmm.
https://bugzilla.gnome.org/show_bug.cgi?id=697229
Flags being used in the G_DEFINE_TYPE_EXTENDED sample was "0", so it
should expand to 0 as well, otherwise the compiler would bark with:
maman-bar.c: In function ‘maman_bar_get_type’:
maman-bar.c:36:53: error: ‘flags’ undeclared (first use in this function)
maman-bar.c:36:53: note: each undeclared identifier is reported only once for each function it appears in
https://bugzilla.gnome.org/show_bug.cgi?id=697250
Some (broken) toolchains for example trip up
-Werror=missing-prototypes in system headers. This patch allows
people to skip the formerly hardcoded "baseline" warnings.
https://bugzilla.gnome.org/show_bug.cgi?id=694757
When looking up signals by name (to connect, for example) and the named
signal cannot be found on the given instance, report the type of the
instance.
This is quite a lot more useful as a diagnostic message than only a
memory address.
https://bugzilla.gnome.org/show_bug.cgi?id=694350
We need to keep a reference to the handler in the fast path, just like
in the slow path, otherwise if another thread disconnects the handler
we may destroy the closure while we're using it without the lock held.
We also move the freeing of the instance to after the emission is totally
done as the handler_unref_R (and the tracepoint) reference it.
https://bugzilla.gnome.org/show_bug.cgi?id=694253
handler_ref and handler_unref_R are always called with the signal
lock held. This is obvious for handler_unref_R as it even sometimes
drops this lock, and can be verified quickly for handler_ref by looking
at all call sites.
This improves the performace about 6% on the emit-handled and the
emit-handled-generic tests.
https://bugzilla.gnome.org/show_bug.cgi?id=694253
Experimentally disable the ability to unload dynamic types by refusing
to drop the last reference on types (effectively turning the type
unloading into dead code).
The plan is to leave things like this for a stable cycle and only
proceed with removing the code if we are sure that there are no
unforeseen problems.
https://bugzilla.gnome.org/show_bug.cgi?id=693351
The point of g_source_set_closure() is getting memory management right,
including handling closures disappearing from the outside (for example
because a runtime they refer to is being shutdown). This means that
sources with an associated closure should remove themselves from the
main loop and free memory when the closure is invalidated.
https://bugzilla.gnome.org/show_bug.cgi?id=692034
Before this commit, the only difference between the expected and actual
ABI were the addition of _init and _fini symbols in each module (now
that regexp-based export control is not catching those).
This is the bug that has been causing segfaults and criticals when accel
keys are used to close windows via GtkUIManager.
The main cause of this problem was a mistake made in the original patch
when modifying the handler_lookup() to take the extra 'closure'
parameter. The original check used was:
if (handler->sequential_number == handler_id ||
(closure && handler->closure == closure))
It was called to find a particular closure like so:
handler_lookup (instance, 0, closure, &signal_id);
The problem is that the check will return if either the signal ID or
closure matches (if a closure was given). The calling code assumes 0 to
be an invalid signal ID which will match no handlers, but unfortunately
the rest of gsignal code uses this to denote a signal that has already
been disconnected. The result is that this function was searching for a
matching closure _or_ the first already-disconnected handler. When it
found the already-disconnected handler, we'd get criticals and crashes.
The condition has been corrected; it now ignores the handler_id
parameter if the closure parameter is non-NULL.
While we're in here, change the lifecycle of the invalidation notify to
be easier to understand.
Before, the notify was removed when the last reference on the handler
dropped. This could happen in very many situations; often at the end of
an emission. Instead, we now tie the registration of the notifier to
the lifecycle of the signal connection. When the signal is disconnected
we remove the notification, even if other references are held (eg:
because it is currently being dispatched).
https://bugzilla.gnome.org/show_bug.cgi?id=690118
This reverts commit f2e00a07f4.
Moving the block up would prevent G_OS_WIN32 being checked correctly as
it is a macro that is defined by including the GLib header(s), at least for
Visual C++ builds.
https://bugzilla.gnome.org/show_bug.cgi?id=691769
We only want to control the default visibility for our five main
installable libraries: libglib, libgthread, libgmodule, libgobject,
libgio. We should therefore only set -fvisibility=hidden when building
those.
Use a separate substitution variable for this purpose.
Using CFLAGS directly leads to some modules built in testcases not
exporting their symbols (and then the tests fail). It also affects the
fam file monitoring module.
Colin had originally done it this way in his visibility patch series but
I failed to understand why so I didn't copy it. Now I do.
Also: revert changes made to two testcases in an attempt to work around
this issue.
https://bugzilla.gnome.org/show_bug.cgi?id=691756
Commit 282366c326 unnecessarily (skip)ed all the GParamSpec constructors like
g_param_spec_bool(). Make those introspectable by dropping the (skip) and
adding proper transfer annotations.
Keep g_param_spec_value_array() skipped as GValueArray is deprecated.
With visibility now under the control of __declspec(dllexport) we no
longer need to build .def files or use them for building our various
.dll files.
.def files used to be installed (even though it is only really useful
when creating the .dll or .lib file). Don't do that anymore either.
The Makefiles still contain rules to create a .lib file for use with
Visual Studio and these rules require .def files. There are special
requirements to using these rules (like having installed and setup
Microsoft tools for use during the build) and therefore the problem of
creating a .def file for use with them is left open to anyone willing to
make the effort. Many options are available depending on which
toolchain is in use (dlltool, pexport, gendef, dumpbin.exe, just to name
a few).
If we can find a free tool for creating .lib files in the future, we
should probably revisit this issue and add proper support back to our
build system.
This macro simply evaluates the "extern" unless it has been explicitly
defined to something else.
All of the version macros (including the unversioned deprecation markers
and GLIB_AVAILABLE_IN_ALL) now include _GLIB_EXTERN as part of their
definition.
G_INLINE has also been modified to use _GLIB_EXTERN where appropriate.
This macro should never be used outside of the gmacros.h/gversonmacros.h
headers.
The effect of this patch is that "extern" has now been added to all
functions declared in installed headers. Strictly speaking, this is
something we should have had all along...
GLIB_VAR and GOBJECT_VAR have also been modified to use _GLIB_EXTERN on
non-Windows, instead of "extern" which they were using before. The
eventual goal is to use the normal version/deprecation macros on
exported variables and drop GLIB_VAR but we need to see how this will
work on Windows before we go ahead with that.
https://bugzilla.gnome.org/show_bug.cgi?id=688681
Add the GLIB_AVAILABLE_IN_ALL annotation to all old functions (that
haven't already been annotated with the GLIB_AVAILABLE_IN_* macros or a
deprecation macro).
If we discover in the future that we cannot use only one macro on
Windows, it will be an easy sed patch to fix that.
https://bugzilla.gnome.org/show_bug.cgi?id=688681
Add a check to prevent adding an interface to a class that has already
had its class_init done.
This is an incompatible change but it is suspected that there are not
many users of this functionality. Two known exceptions are pygobject
(fixed in bug 686149) and our own testsuite (affected tests have been
temporarily disabled by this patch).
Once we confirm that nobody else is using this functionality we can
remove a rather large amount of code for dealing with this case.
https://bugzilla.gnome.org/show_bug.cgi?id=687659
GValueArray as a whole is deprecated in favor of GArray (with GValue
elements); warnings like "'g_value_array_get_nth' is deprecated: Use
'g_array_index' instead" are confusing because they suggest that the
GArray functions can be used with GValueArrays. Make them say "Use
'GArray' instead" instead.
https://bugzilla.gnome.org/show_bug.cgi?id=690970
Add a check to prevent adding an interface to a class that has already
had its class_init done.
This is an incompatible change but it is suspected that there are not
many users of this functionality. Two known exceptions are pygobject
(fixed in bug 686149) and our own testsuite (affected tests have been
temporarily disabled by this patch).
Once we confirm that nobody else is using this functionality we can
remove a rather large amount of code for dealing with this case.
https://bugzilla.gnome.org/show_bug.cgi?id=687659
When g_type_class_get_private is called without calling
g_type_add_class_private first, a g_warning is issued, but
the name of the function to call is wrong:
g_type_class_add_class_private.
https://bugzilla.gnome.org/show_bug.cgi?id=690348
In 2.34, g_compute_checksum_for_bytes() was added, but this patch
allows binding users to use the incremental update API; this is
significantly more efficient than reading entire files into memory.
https://bugzilla.gnome.org/show_bug.cgi?id=689982
This lets you cache type lookup information and then know when
the cache information is out of date. In particular, we want this
in order to be able to cache g_type_from_name() lookups in the Gtk+
theme machinery.
https://bugzilla.gnome.org/show_bug.cgi?id=689847
At least GDBus had code that had "_object" as a parameter to one of
its functions, but this clashes with the GObject macro
G_OBJECT_WARN_INVALID_PROPERTY_ID() which created a local "_object".
Since many of us cargo cult around copies of objects, let's be
defensive here and use local variable names less likely to clash with
application code.
https://bugzilla.gnome.org/show_bug.cgi?id=689377
The gobject tools (glib-genmarshal and gobject-query) were linking
against libgthread. Stop that.
Also, remove the gthread_INCLUDES internal automake substitution.
This reverts commit 028d4a03f2.
I thought that we would be able to get away with this incompatible
change but it appears to impact far too much existing code. The only
thing we can do is revert.
https://bugzilla.gnome.org/show_bug.cgi?id=688596
