The implementation of GValue is not public or documented. When
allocated on the stack, initializing a GValue is usually done as
documented with:
GValue value = { 0, };
There is lot code around (including WebKit) that added all the missing
fields, resulting in this ugly and non-obvious:
GValue value = { 0, { { 0 } } };
However, this doesn't play nice with -Wmissing-field-initializers for
example. Thus, G_VALUE_INIT.
http://bugzilla.gnome.org/show_bug.cgi?id=654793http://bugzilla.gnome.org/show_bug.cgi?id=577231
Since we added g_object_notify_by_pspec(), an efficient way to install
and notify properties relies on storing the GParamSpec pointers inside
a static arrays, like we do for signal identifiers.
Instead of multiple calls to g_object_class_install_property(), we
should have a single function to take the static array of GParamSpecs
and iterate it.
https://bugzilla.gnome.org/show_bug.cgi?id=626919
Signed-off-by: Emmanuele Bassi <ebassi@linux.intel.com>
Since using the function pointer version muddles the memory management
requirements of language bindings, we should implement a GClosure-based
variant on top of g_object_bind_property_full().
https://bugzilla.gnome.org/show_bug.cgi?id=622278
GBinding is a simple, opaque object that represents a binding between a
property on a GObject instance (source) and property on another GObject
instance (target).
https://bugzilla.gnome.org/show_bug.cgi?id=348080
g_object_notify_by_pspec() will emit the "notify" signal on the given
pspec, short-circuiting the hash table lookup needed by
g_object_notify(). The suggested and documented way of using
g_object_notify_by_pspec() is similar to the way of emitting signals
with their ID.
Emission tests (with no handler attached to the notify signal) show a
10-15% speedup over using g_object_notify().
https://bugzilla.gnome.org/show_bug.cgi?id=615425
2005-05-05 Owen Taylor <otaylor@redhat.com>
* gobject.[ch] gobject.symbols: Add
g_object_add/remove_toggle_ref() functions to get notification
when a reference count is the last remaining reference; this
enables better memory management for language bindings.
(http://mail.gnome.org/archives/gtk-devel-list/2005-April/msg00095.html)
2005-05-05 Owen Taylor <otaylor@redhat.com>
* glib/gdataset.[ch] glib/gdatasetprivate.h: Add
g_datalist_set/unset_flags(), g_datalist_get_flags() functions
to squeeze some bits into a GDataSet... this is needed for
efficient implementation of toggle references in GObject.
* tests/gobject/references.c tests/gobject/Makefile.am:
Add a test case for weak and toggle references.
* glib/gfileutils.[ch]: Rename g_file_replace() back
to g_file_set_contents().
* glib/glib.symbols: Update.
2005-05-05 Owen Taylor <otaylor@redhat.com>
* glib/Makefile.am glib/glib-sections.txt gobject/gobject-sections.txt:
Update
* gobject/tmpl/objects.sgml: Document toggle-references.
Sun Oct 5 23:23:53 2003 Matthias Clasen <maclas@gmx.de>
* gobject/glib-sections.txt:
* gobject/gobject-sections.txt: Fix includes.
* gobject/tmpl/value_collection.sgml: Add docs found in the
header.
2003-09-12 Matthias Clasen <maclas@gmx.de>
Make the g_value_set_x_take_ownership() functions "official"
part of the API (#100948):
* gvaluetypes.[hc]: Add g_value_take_string() (synonym to the
now deprecated g_value_set_string_take_ownership()).
* gparam.[hc]: Add g_value_take_param() (synonym to the
now deprecated g_value_set_param_take_ownership()).
* gobject.[hc]: Add g_value_take_object() (synonym to the
now deprecated g_value_set_object_take_ownership()).
* gboxed.[hc]: Add g_value_take_boxed() (synonym to the
now deprecated g_value_set_boxed_take_ownership()).
* gobject/gobject-sections.txt: Add new g_value_take_x() functions.
* gobject/tmpl/param_value_types.sgml: Document new g_value_take_x()
functions. (#100948)
Tue Jan 29 11:18:44 2002 Owen Taylor <otaylor@redhat.com>
* 1.3.13
* NEWS: Updated.
* configure.in: Micro == 13, binary age, interface age 0.
[ binary breakage was return type of g_signal_connect_object(),
probably could have used binary age == 0, but a little safer not to.]
* configure.in: Remove configure warning.
Thu Nov 22 00:26:26 2001 Tim Janik <timj@gtk.org>
* gtype.[hc]: provide G_TYPE_FUNDAMENTAL_SHIFT and
g_type_fundamental_next() to return next usable fundamental
type. use TypeNode pointers as type IDs.
Tue Nov 13 21:31:58 2001 Tim Janik <timj@gtk.org>
* gobject/tmp/param_value_types.sgml: list parameter and
value types.
* gobject/tmpl/gparamspec.sgml: more docs for g_param_spec*()
functions.
* gobject/*: section cleanups.
Mon Sep 10 17:13:36 2001 Tim Janik <timj@gtk.org>
* glib/gmessages.h: got rid of g_set_error_handler(),
g_set_warning_handler(), g_set_message_handler().
Wed Sep 5 05:24:07 2001 Tim Janik <timj@gtk.org>
* gobject/tmpl/gboxed.sgml: documented some functions.
* gobject/tmpl/objects.sgml: some fixups.
Mon Sep 10 19:27:47 2001 Tim Janik <timj@gtk.org>
* gtype.[hc]:
g_type_add_interface*(): implement the ability to add an interface to
a type whose parents already conform to this interface.
such "overriding" interfaces, when initialized, are not just initialized
with 0, but with a copy of the interface they override.
g_type_interface_peek_parent(): new function, return the interface
that this interface "overrides", if any.
* testgruntime.c: test new interface stuff.
2001-08-06 Sven Neumann <sven@gimp.org>
* glib/gutils.[ch]: added new function g_nullify_pointer().
* gobject/gobject.[ch]:
added new functions g_object_[add|remove]_weak_pointer().
Wed Mar 7 15:02:17 2001 Owen Taylor <otaylor@redhat.com>
* gobject/Makefile.am: Revert Tim's last commit to
get rid of 7+ unnecessary / broken changes. Add
back the useful part. Also fix problem with grep,
add dependency on template files.
* gobject/gobject-sections.txt: Remove double
value_types names which was screwing up builds.
* glib/Makefile.am: Propagate changes from
gobject/Makefile.am
Wed Mar 7 09:36:33 2001 Tim Janik <timj@gtk.org>
* gboxed.[hc]: changed prototype of g_boxed_type_register_static()
to contain an optional init function and a hint at whether the
boxed structure uses ref counting internally.
added g_value_set_boxed_take_ownership().
made G_TYPE_BOXED an abstract value type.
* genums.[hc]: made G_TYPE_ENUM and G_TYPE_FLAGS abstract value
types.
* glib-genmarshal.c: argument type changes, preparation for third-party
arg specification.
* gobject.[hc]: cleaned up get/set property code.
added g_strdup_value_contents() to improve warnings.
* gparam.[hc]: added g_param_value_convert(), taking over responsibility
of the old g_value_convert(). added G_PARAM_LAX_VALIDATION flag so
validation alterations may be valid a part of the property setting
process.
* gparamspecs.[hc]: made value comparisons stable (for sort applications).
added GParamSpecValueArray, a param spec for value arrays and
GParamSpecClosure. nuked the value exchange functions and
GParamSpecCCallback.
* gtype.[hc]: catch unintialized usages of the type system with
g_return_val_if_uninitialized(). introduced G_TYPE_FLAG_VALUE_ABSTRACT
to flag types that introduce a value table, but can't be used for
g_value_init(). cleaned up reserved type ids.
* gvalue.[hc]: code cleanups and saner checking.
nuked the value exchange API. implemented value transformations, we
can't really "convert" values, rather transforms are an anylogy to
C casts, real conversions need a param spec for validation, which is
why g_param_value_convert() does real conversions now.
* gvaluearray.[hc]: new files that implement a GValueArray, a struct
that can hold inhomogeneous arrays of value (to that extend that it
also allowes undefined values, i.e. G_VALUE_TYPE(value)==0).
this is exposed to the type system as a boxed type.
* gvaluetransform.c: new file implementing most of the former value
exchange functions as single-sided transformations.
* gvaluetypes.[hc]: nuked G_TYPE_CCALLBACK, added
g_value_set_string_take_ownership().
* *.h: s/G_IS_VALUE_/G_VALUE_HOLDS_/.
* *.[hc]: many fixes and cleanups.
* many warning improvements.
Tue Feb 27 18:35:15 2001 Tim Janik <timj@gtk.org>
* gobject.c (g_object_get_valist): urg, pass G_VALUE_NOCOPY_CONTENTS
into G_VALUE_LCOPY(), this needs proper documenting.
* gparam.c: fixed G_PARAM_USER_MASK.
* gtype.c (type_data_make_W):
(type_data_last_unref_Wm): fixed invalid memory freeing.
* gobject.c (g_object_last_unref): destroy signal handlers associated
with object, right before finalization.
* gsignal.c (g_signal_parse_name): catch destroyed nodes or signals
that don't actually support details.
* gobject.[hc]: got rid of property trailers. nuked GObject
properties "data" and the "signal" variants.
(g_object_connect): new convenience function to do multiple
signal connections at once.
(g_object_disconnect): likewise, for disconnections.
* gparam.[hc] (g_param_spec_pool_lookup): took out trailer support.
* gvalue.[hc]: marked g_value_fits_pointer() and g_value_peek_pointer()
as private (the latter got renamed from g_value_get_as_pointer()).
Wed Mar 7 09:32:06 2001 Tim Janik <timj@gtk.org>
* glib-object.h: add gvaluearray.h.
* gstring.[hc]: fixup naming of g_string_sprint*.
* gtypes.h: fixed GCompareDataFunc naming.
Wed Mar 7 09:33:27 2001 Tim Janik <timj@gtk.org>
* gobject/Makefile.am: shuffled rules to avoid excessive
rebuilds.
* gobject/gobject-sections.txt: updates.
* gobject/tmpl/*: bunch of updates, added another patch
from Eric Lemings <eric.b.lemings@lmco.com>.
Wed Jan 31 07:14:22 2001 Tim Janik <timj@gtk.org>
* gobject/Makefile.am: adapt to work with new CVS gtk-doc, leaving the old
rules in place caused bogus recursions. main changes:
- add to conditionalized section:
all-local:
$(MAKE) scan
$(MAKE) templates
$(MAKE) sgml
$(MAKE) html.stamp
html.stamp: sgml.stamp $(EXTRA_SGML_FILES)
$(MAKE) html
DOC_STAMPS= html.stamp sgml.stamp
- change:
maintainer-clean-local: clean
- cd $(srcdir) && rm -rf sgml html $(DOC_MODULE)-decl-list.txt $(DOC_MODULE)-decl.txt
+ cd $(srcdir) && rm -rf sgml html $(DOC_MODULE)-decl-list.txt $(DOC_MODULE)-decl.txt $(DOC_STAMPS)
* glib/Makefile.am (maintainer-clean-local): dito.
Wed Jan 31 06:21:32 2001 Tim Janik <timj@gtk.org>
* gobject/tmpl/types.sgml: applied docu patch from Eric Lemings
<eric.b.lemings@lmco.com>, did some more editing.
Wed Jan 31 06:19:49 2001 Tim Janik <timj@gtk.org>
* gparam.h: gtk-doc sucks for not dealing with #define inside enums.
* gtype.[hc]: added G_TYPE_FLAG_RESERVED_ID_BIT, a bit in the type
number that's supposed to be left untouched (preserved mainly
for the signal code).
* *.c: added thread safety code, based on an old patch from sebastian.
the remaining thread safety issues are now datalists on pspecs (to be
solved im gdataset.c) and gvalue.c where locking concerns value exchange
functionality only, and that's soon to be revised.
Tue Jan 9 03:10:38 2001 Tim Janik <timj@gtk.org>
* gobject/tmpl/types.sgml: added some function documentations.
* gobject/gobject-sections.txt: buncha fixups.
Sun Nov 5 13:24:50 2000 Owen Taylor <otaylor@redhat.com>
* gobject/Makefile.am gobject/gobject-sections.sgml: Updates
* gobject/tmpl/g{boxed,type{plugin,module}}.sgml: added
Fri Nov 3 07:35:00 2000 Tim Janik <timj@gtk.org>
* gsignal.[hc]: prefix internal functions with '_'. renamed
g_signal_connect_closure() to g_signal_connect_closure_by_id().
added g_signal_parse_name() to retrive signal_id and detail quark
from a signal name (internal).
Fri Nov 3 07:33:15 2000 Tim Janik <timj@gtk.org>
* gobject/gobject-docs.sgml: added &gobject-closures; section.
* gobject/Makefile.am (tmpl_sources): add tmpl/clsoures.sgml
* gobject/gobject-sections.txt: added Closure section.
* gobject/tmpl/closures.sgml: new file with template description
for GClosure functions.
Wed Nov 1 03:36:54 2000 Tim Janik <timj@gtk.org>
* gobject.c (g_object_base_class_finalize): destroy all signals that
the finalized obejct type introduced.
* gsignal.c (g_signals_destroy): don't require itype to have
signals.
* gobject.c (g_object_do_finalize): make sure all signal handlers
are destroyed.
* gsignal.[hc]:
(g_signal_handler_find): only match on non-0 masks.
(g_signal_handlers_block_matched):
(g_signal_handlers_unblock_matched):
(g_signal_handlers_disconnect_matched): new functions to block/unblock
or disconnect handlers in groups.
Mon Oct 30 06:01:43 2000 Tim Janik <timj@gtk.org>
* gobject/gobject-sections.txt: opened up a new section on signals.
Mon Oct 30 05:52:45 2000 Tim Janik <timj@gtk.org>
* gsignal.c (g_signal_list_ids): get rid of inline documentation owen
added, the doc system would ignore it anyways (for some reason not
aparent to me).
Wed Sep 6 00:30:09 2000 Owen Taylor <otaylor@redhat.com>
* glib/* gobject/*: Split GObject docs away from
the remainder of the docs.
* glib/Makefile.am gobject/Makefile.am: Rework
to have reasonable dependencies. (No dependencies
on the files actually in the source directories,
so to get it going, you have to do 'make scan',
but after that, things should work OK.)
