If the user passes an explicit setter function when creating a
GProperty, we assume that a notify signal will be emitted. For direct
access to a structure field, we can emit an implicit notification
ourselves, since we know that if the value has changed.
This changes the signature of the explicit setter functions.
Do not implicitly grab the private data offset inside GProperty: we
allow passing any offset when creating a new GProperty, and let the
user decide where the property is stored, by giving us the correct
offset — either from the instance structure, or from the private
structure.
https://bugzilla.gnome.org/show_bug.cgi?id=648526
GProperty should store the default value (if any) of a property, as well
as the eventual overrides coming from the sub-classes of the class that
defined the property.
https://bugzilla.gnome.org/show_bug.cgi?id=648526
Dealing with GParamSpec is tedious and less efficient than necessary.
GParamSpec is a data type meant to be used to validate GValue, and only
incidentally provides us with the facilities to implement properties on
GObject. GObject itself requires us to provide accessors functions and
then call them from within a huge switch() inside two virtual functions.
Property definitions should be able to either directly access a struct
field or specify the accessors pair that control a property. On top of
that, most of the property and accessor definition can be autogenerated
from simple pre-processor directives.
So, here's to you GProperty.
GProperty is a GParamSpec sub-class that encapsulates all the C
fundamental types inside a single, opaque structure (to avoid leaking
out implementation details); a GProperty can access the structure member
holding the value of the property, or invoke the accessor functions
passed to its constructor. Type safety is enforced at compile time
through the C type system, and at run time through the GType system.
GProperty will try *very* hard to avoid boxing and unboxing fundamental
type values into GValues.
GObject will recognize whether a GParamSpec used to set or get a
property is really a GProperty, and thus will shortcircuit most of the
GValue-based marshalled code, preferring the direct C function and
direct argument collection instead of boxing/unboxing of GValues.
https://bugzilla.gnome.org/show_bug.cgi?id=648526
As it turns out, we have examples of internal functions called
type_name_get_private() in the wild (especially among older libraries),
so we need to use a name for the per-instance private data getter
function that hopefully won't conflict with anything.
For static types, it should be possible to register a private data
structure right when we are registering the type, i.e. from the
get_type() implementation. By allowing this, we can take advantage of
the existing type definition macros to cut down the amount of code
necessary (as well as the knowledge baggage) when creating a new type.
The main issue with this new feature is that it cannot be mixed with the
old idiomatic way of adding private instance data by calling a function
in the middle of the class_init() implementation, as that imposes the
additional constraint of initializing the whole type hierarchy in order
to retrieve the offset of the private data in the GTypeInstance
allocation.
For this reason we are going to follow a two-step process; in the first
step, we are going to introduce the new (semi-private) API to register
the intent to add private instance data from within the get_type()
implementation, and hide it behind a macro; at the same time, the
G_DEFINE_TYPE_EXTENDED macro is going to be modified so that it will
register the private instance data if the macro was used, using a new
(semi-private) function as well. Once we have migrated all our code, we
will make the first new function perform the actual private data
registration, and turn the second new function into a no-op. This should
guarantee a transparent migration of existing code to the new idiomatic
form.
https://bugzilla.gnome.org/show_bug.cgi?id=700035
The automatic memory management of GBinding is not optimal for high
order languages with garbage collectors semantics. If we leave the
binding instance inert but still referenced it will be leaked, so one
solution that does not throw away the baby of C convenience with the
bathwater of language bindability is to have unbind() perform an
implicit unref().
Hopefully, C developers will read the documentation and especially the
note that says that after calling unbind() the reference count on the
GBinding instance is decreased.
https://bugzilla.gnome.org/show_bug.cgi?id=698018
Perform a substantial cleanup of the build system with respect to
building and installing testcases.
First, Makefile.decl has been renamed glib.mk and substantially
expanded. We intend to add more stuff here in the future, like canned
rules for mkenums, marshallers, resources, etc.
By default, tests are no longer compiled as part of 'make'. They will
be built when 'make check' is run. The old behaviour can be obtained
with --enable-always-build-tests.
--disable-modular-tests is gone (because tests are no longer built by
default). There is no longer any way to cause 'make check' to be a
no-op, but that's not very useful anyway.
A new glibtests.m4 file is introduced. Along with glib.mk, this
provides for consistent handling of --enable-installed-tests and
--enable-always-build-tests (mentioned above).
Port our various test-installing Makefiles to the new framework.
This patch substantially improves the situation in the toplevel tests/
directory. Things are now somewhat under control there. There were
some tests being built that weren't even being run and we run those now.
The long-running GObject performance tests in this directory have been
removed from 'make check' because they take too long.
As an experiment, 'make check' now runs the testcases on win32 builds,
by default. We can't run them under gtester (since it uses a pipe to
communicate with the subprocess) so just toss them in TESTS. Most of
them are passing on win32.
Things are not quite done here, but this patch is already a substantial
improvement. More to come.
Higher order languages with garbage collection can have issues releasing
a binding, as they do not control the last reference being dropped on
the binding, source, or target instances.
https://bugzilla.gnome.org/show_bug.cgi?id=698018
The way of getting the default value out of a GParamSpec is to allocate
a GValue, initialise it, then call g_param_spec_set_default() to set the
default value into that GValue.
This is exactly how we handle setting the default value for all of the
construct properties that were not explicitly passed to g_object_new().
Instead of doing the alloc/init/store on all construct properties on
every call to g_object_new(), we can cache those GValues in the private
data of the GParamSpec itself and reuse them.
This patch does not actually make that change to g_object_new() yet, but
it adds the API to GParamSpec so that a future patch to GObject can make
the change.
https://bugzilla.gnome.org/show_bug.cgi?id=698056
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
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
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
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
Basically due to a combination of va_args semantics around
signed/unsigned ints, this test case fails on ppc64. At the moment,
we have as yet to find any real-world consumer with such a large
enumeration value.
Unfortunately, the possible fixes for this are extremely invasive;
we would have to define a new enum API.
Given both of these facts, we believe it makes the most sense at the
current time to simply not test this. If we at a later time determine
there is such a real-world consumer, we can look at doing the
necessary fixes.
https://bugzilla.gnome.org/show_bug.cgi?id=686662
Very many testcases, some GLib tools (resource compiler, etc) and
GApplication were calling g_type_init().
Remove those uses, as they are no longer required.
https://bugzilla.gnome.org/show_bug.cgi?id=686161
If the closure is invalidated we drop the ref on the signal handler
node, but if the signal is currently being dispatched, the ref could be
held elsewhere.
Flag that we no longer have an outstanding invalidation handler so that
we don't try to unregister ourselves when the other ref drops.
Add a testcase that catches this situation.
