It's theoretically possible that we could have a case where this would
actually return NULL, but it's difficult to imagine a valid program that
would contain such a case.
Add an explicit assert here to quiet up static analysis.
See the bug for more discussion.
Coverity CID: 1159477
https://bugzilla.gnome.org/show_bug.cgi?id=730296
Where we were already treating GHashTables as sets, modify them to use
the set-specific APIs g_hash_table_add() and g_hash_table_contains(), to
make that usage more obvious and less prone to being broken.
Heavily based on patches by Garrett Regier <garrettregier@gmail.com>.
Signed-off-by: Philip Withnall <withnall@endlessm.com>
https://bugzilla.gnome.org/show_bug.cgi?id=749371
Clarify the licensing of the code generated by the two scripts in a
comment in the header of each generated file. The intention is that the
license of GLib does *not* apply to the generated files; but that they
are subject to the linking restrictions of the LGPL, since they link to
GLib and GLib is licensed under the LGPL. The generated files themselves
are under the license of whatever project they’re generated for.
Signed-off-by: Philip Withnall <withnall@endlessm.com>
https://bugzilla.gnome.org/show_bug.cgi?id=788990
We should ensure a stable order when processing the files, regardless of
the order they were submitted on the command line, to increase the
chances of a reproducible build.
The old Perl-based version of glib-mkenums was fixed in commit 8686e430
to do the same.
https://bugzilla.gnome.org/show_bug.cgi?id=691436
The fallback code for providing a default comment template only worked
if a template file was provided. It didn’t work if individual templates
were provided on the command line (and --comment wasn’t).
Signed-off-by: Philip Withnall <withnall@endlessm.com>
https://bugzilla.gnome.org/show_bug.cgi?id=788990
They return floating references. The convention established by GVariant
is to annotate these as (transfer none) so that the caller does a
ref+sink on them, rather than just a ref.
Signed-off-by: Philip Withnall <withnall@endlessm.com>
https://bugzilla.gnome.org/show_bug.cgi?id=677233
The m4 and bash completion items are usable and relevant
depending on the host system's configuration. So, we check for the
presence of the programs that these items depend on, and only install
them when those programs are found.
For the Valgrind suppression files, we don't install them on Windows as
Valgrind is currently not supported on Windows.
Als fix the path where the GDB helpers are installed, as the path is
incorrectly constructed.
This will fix the "install" stage when building on Visual Studio at
least as there are some post-install steps that are related to them,
which will make use of these programs.
https://bugzilla.gnome.org/show_bug.cgi?id=783270
This was duplicated also in g_object_interface_install_property().
Now, validations specific to classes happen in
validate_and_install_class_property() - specifically, the checks for
the presence of the get_property() and set_property() methods.
https://bugzilla.gnome.org/show_bug.cgi?id=787551
Commit 31ae2c5598 added the C++ guards
around all prototypes, including inside the header file. The header
file, though, already has C++ guards, so while it's harmless to have
them there, it's also unnecessary.
We should only emit C++ guards around the prototypes we include in the
generated source.
Since --header --body has been deprecated and replaced with --body
--prototypes, the generated body is not wrapped with G_{BEGIN,END}_DECLS
any longer. Projects using C++ break due to that. Automatically wrap
prototypes individually in G_{BEGIN,END}_DECLS instead.
https://bugzilla.gnome.org/show_bug.cgi?id=785554
In case of Python 2 and stdout being redirected to a file, sys.stdout.encoding
is None and it defaults ASCII for encoding text.
To match the behaviour of Python 3, which uses the locale encoding also when
redirecting to a file, wrap sys.stdout with a StreamWriter using the
locale encoding.
https://bugzilla.gnome.org/show_bug.cgi?id=785113
Instead of using NamedTemporaryFile, which doesn't take an encoding in Python 2
use mkstemp() to create a file and open it with io.open(), with a proper
encoding set.
https://bugzilla.gnome.org/show_bug.cgi?id=785113
On Windows open() defaults to ANSI and on Python 2 it doesn't take
an encoding. Use io.open() instead which provides the same interface
on both Python versions.
https://bugzilla.gnome.org/show_bug.cgi?id=785113
The Meson build has fallen a bit behind the Autotools one, when it comes
to the internally built tools like glib-mkenums and glib-genmarshals.
We don't need to generate gmarshal.strings any more, and since the
glib-genmarshal tool is now written in Python it can also be used when
cross-compiling, and without indirection, just like we use glib-mkenums.
We can also coalesce various rules into a simple array iteration, with
minimal changes to glib-mkenums, thus making the build a bit more
resilient and without unnecessary duplication.
The old glib-mkenums was more forgiving, and simply ignored any files it
could not find.
We're going to print a warning, as in the future we may want to allow
more strictness.
This is a bit of a hack to maintain some semblance of backward
compatibility with the old, Perl-based glib-mkenums. The old tool had an
implicit ordering on the arguments and templates; each argument was
parsed in order, and all the strings appended. This allowed developers
to write:
glib-mkenums \
--fhead ... \
--template a-template-file.c.in \
--ftail ...
And have the fhead be prepended to the file-head stanza in the template,
as well as the ftail be appended to the file-tail stanza in the
template. Short of throwing away ArgumentParser and going over
sys.argv[] element by element, we can simulate that behaviour by
ensuring some ordering in how we build the template strings:
- the head stanzas are always prepended to the template
- the prod stanzas are always appended to the template
- the tail stanzas are always appended to the template
Within each instance of the command line argument, we append each value
to the array in the order in which it appears on the command line.
This change fixes the libqmi build.
Some of the arguments that affect the generated result in glib-mkenums
can be used multiple times, to avoid embedding unnecessary newlines in
their values.
This change fixes the NetworkManager build.
When using the `--header --body` compatibility mode, we need to emit
things we generally define in the header, such as the aliases for
standard marshallers, and aliases for deprecated tokens.
This fixes dbus-binding-tool, which is using `--header --body` and
deprecated tokens.
See: https://bugs.freedesktop.org/show_bug.cgi?id=101799
Fixes get_type function generation for:
- GMountMountFlags
- GDriveStartFlags
- GResourceLookupFlags
- GSocketMsgFlags
- GTlsDatabaseVerifyFlags
- GTestDBusFlags
which were registered as enum types before, which broke
some unit tests.
Problem is that the flags annotation has no value, so
options.get('flags') would always return None even if
it was present.
https://bugzilla.gnome.org/show_bug.cgi?id=779332
This reduces the build-time dependencies of glib to only Python 3,
Meson, and git. Git is also optional if you provide a tarball in
which the subproject directories already exist.
The Python port was done by Jussi Pakkanen on bugzilla:
https://bugzilla.gnome.org/show_bug.cgi?id=779332
This version contains some fixes from that and also changes all
instances of `@` to `\u0040` because Meson does not yet provide a
configure_file() mode that ignores unknown @MACRO@ values.
This is a stub-only library that can be used while building against
MSVC and contains no i18n machinery at all.
The dependencies added indirectly use the libintl.h header, and when
built as a subproject, the header won't be in a path known the
pre-processor.
Don't use it project-wide for building everything. Otherwise
symbols for shared modules won't be exposed, e.g. in the
resourceplugin used by the gio resource unit test.
Disable gio tests on Windows, fix .gitignore to not ignore
config.h.meson, and add more things to it.
Rename the library file naming and versioning to match what Autotools
outputs, e.g., libglib-2.0.so.0.5000.2 on Linux, libglib-2.0-0.dll and
glib-2.0-0.dll on Windows with MSVC.
Several more tiny fixes, more executables built and installed, install
pkg-config and m4 files, fix building of gobject tests.
Changes to gdbus-codegen to support out-of-tree builds without
environment variables set (which you can't in Meson). We now add the
build directory to the Python module search path.
We're in the process or rewriting other tools in Python to reduce the
number of dependencies of GLib.
Additionally, making glib-genmarshal a Python script reduces the
complexity when cross-compiling, as we don't need a native build to
generate the marshallers.
https://bugzilla.gnome.org/show_bug.cgi?id=784528
It is possible, when using GTK-Doc, to mark sections of an enumeration
type as "private": the values are there, but they are not documented,
and GTK-Doc won't complain about missing symbols:
typedef enum {
/*< private >*/
MY_FOO_PRIVATE,
/*< public >*/
MY_FOO_VALUE_A,
MY_FOO_VALUE_B,
/*< private >*/
MY_FOO_VALUE_C,
MY_FOO_VALUE_D
} MyFooValue;
The glib-mkenums parser also allows skipping enumeration values, using a
slightly different syntax:
typedef enum P
MY_BAR_PRIVATE, /*< skip >*/
MY_BAR_VALUE_A,
MY_BAR_VALUE_B
} MyBarValue;
The annotation must sit on the same line as the enumeration value.
Both GTK-Doc and glib-mkenum use the same trigraph syntax, but slightly
different keys. This makes combining them slightly redundant, but
feasible.
All would be well and good, except that glib-mkenum will generate a
warning for lines it does not understand — and that includes the GTK-Doc
annotation trigraph, which, when confronted with the MyFooValue
enumeration above, will result in a warning like:
glib-mkenums: myfoo.h:2: Failed to parse ` /*< private >*/ '
glib-mkenums: myfoo.h:5: Failed to parse ` /*< public >*/ '
glib-mkenums: myfoo.h:9: Failed to parse ` /*< private >*/ '
Of course, we could make glib-mkenum ignore any trigraph comment on a
stand alone line, but it would probably be better to ensure that both
glib-mkenums and gtk-doc behave consistently with each other, and
especially with the maintainer's intent of hiding some values from the
user, and reserving them for internal use.
So we should ensure that glib-mkenums automatically skips all the
enumeration values after a "private" flag has been set, until it reaches
a "public" stanza.
https://bugzilla.gnome.org/show_bug.cgi?id=782162
This way code that does not manually include the generated marshallers
header and wishes to build with `-Wmissing-prototypes` will not generate
a compiler warning.
https://bugzilla.gnome.org/show_bug.cgi?id=781755
It's unnecessary, and only adds visual noise; we have been fairly
inconsistent in the past, but the semi-colon-less version clearly
dominates in the code base.
https://bugzilla.gnome.org/show_bug.cgi?id=669355
This is going to be checked again by g_object_new_with_properties()
and g_object_new_valist() anyway, so might just as well leave it
to those functions to do the check and only do it once. It doesn't
matter which function emits the critical warning in the end either,
as one has to look at a stack trace to find out what code triggered
it in any case.
https://bugzilla.gnome.org/show_bug.cgi?id=780908
g_object_newv uses a GParameter as argument. Since GParameter
is deprecated due to this type is not introspectible,
g_object_newv is deprecated now.
https://bugzilla.gnome.org/show_bug.cgi?id=709865
g_object_new_with_properties is an alternative to g_object_newv.
The last one, takes an array of GParameter. However, GParameter
is a rarely used type and this type is not introspectible, so
it will not work properly in bindings.
https://bugzilla.gnome.org/show_bug.cgi?id=709865
They do not start with the #!/usr/bin/python that would be necessary
to make them run with Python rather than a shell, and they would
not be useful to run anyway: they are libraries to be imported,
not scripts to be run.
Signed-off-by: Simon McVittie <smcv@debian.org>
It was suggested that the project files be moved here as we don't actually
need to go two directory layers from $(srcroot), and would help us to
standardize on things in the future across the board.
The macros differ in their handling of NULL values — some macros ignore
them and pass through (e.g. G_TYPE_CHECK_INSTANCE_CAST) while others
will explicitly emit a warning if passed NULL (e.g.
G_TYPE_CHECK_INSTANCE).
Document their behaviour, so people don’t end up putting unnecessary
NULL checks in their code when doing checked type casts.
https://bugzilla.gnome.org/show_bug.cgi?id=735731
glibc string.h declares memcpy() with attribute(nonnull(1,2)), causing
calls with NULL arguments to be treated as undefined behaviour.
This is consistent with ISO C99 and C11, which state that passing 0
to string functions as an array length does not remove the requirement
that the pointer to the array is a valid pointer.
gcc -fsanitize=undefined catches this while running OSTree's test suite.
Similarly, running the GLib test suite reports similar issues for
qsort(), memmove(), memcmp().
Signed-off-by: Simon McVittie <smcv@debian.org>
Bug: https://bugzilla.gnome.org/show_bug.cgi?id=775510
Reviewed-by: Colin Walters
global variables in SystemTap are shared between all SystemTap scripts;
so if scripts are loaded for two versions of GLib (for example, a stable
and a development version), those global variables will conflict.
Avoid that by including the soname’s version in the global variable
names.
https://bugzilla.gnome.org/show_bug.cgi?id=770646
If we have an input parameter (or return value) we need to use (nullable).
However, if it is an (inout) or (out) parameter, (optional) is sufficient.
It looks like (nullable) could be used for everything according to the
Annotation documentation, but (optional) is more specific.
gtk-doc doesn’t make the return type clear, because these are macros
rather than inline functions, so people often have to guess at the
return type (or look it up from g_signal_connect_closure(), but that’s
hard work).
Make it clear that the return type for handler IDs is gulong. While
there, fix the capitalisation of ‘id’ to ‘ID’ in a few places.
At some point, upstream SystemTap changed from using a
STAP_HAS_SEMAPHORES preprocessor variable for this, to using
_SDT_HAS_SEMAPHORES instead. We need to update our build system to
disable that as well.
The original discussion about use of semaphores is here:
https://bugzilla.gnome.org/show_bug.cgi?id=606044
This was breaking the build with -flto enabled, either because -flto
doesn’t work with semaphores.
https://bugzilla.gnome.org/show_bug.cgi?id=768198
The C spec leaves conditional evaluation inside a macro expansion as
undefined behaviour. This means we cannot use constructs like:
GOBJECT_IF_DEBUG(OBJECTS, {
...
#ifdef BLAH
...
#endif
...});
Because compilers are entirely justified to ignore the conditional, or,
like in the case of MSVC, error out.
https://bugzilla.gnome.org/show_bug.cgi?id=769504
historically, DEBUG_CODE(gtype.c) and IF_DEBUG(gobject.c, gsignal.c)
macros are used to support debugging messages about object bookkeeping
and signal emission.
DEBUG_CODE has never been used in gtype.c. IF_DEBUG, when used, must be
accompanied by an extra #ifdef G_ENABLE_DEBUG. this is cumbersome.
this patch add a new macro GOBJECT_IF_DEBUG based on DEBUG_CODE as
a replacement for both DEBUG_CODE and IF_DEBUG.
https://bugzilla.gnome.org/show_bug.cgi?id=729914
In a vague attempt at ensuring the .stp scripts can be closely
associated with the .so files which they hard-code references to, rename
the scripts so they include the LT version — so that they are the .so
file name plus .stp.
This does not fix the fact that our .stp scripts will not work on
multiarch systems, as they are installed in an architecture-independent
directory (/usr/share/systemtap/tapset). At the moment, it is
recommended that any distribution who package the .stp files should
install them in the architecture-specific subdirectories of this (for
example, /usr/share/systemtap/tapset/x86-64).
A better long-term solution for this is under discussion upstream:
https://sourceware.org/bugzilla/show_bug.cgi?id=20264https://bugzilla.gnome.org/show_bug.cgi?id=662802
The ability to pass libtool via $(CC) to dtrace and have it respect this
appears to be a feature that is only present in the systemtap version of
the tool. In particular, FreeBSD (which seems to be using a copy of the
tool from Solaris) doesn't support this.
The result is that, with $(CC) ignored, and a .lo file specified in -o,
we get an ELF written to the .lo.
Instead of trying to have dtrace run libtool we can have libtool run
dtrace. dtrace is really just a compiler that produces an object file
here, and it even understands -o, so libtool can make the appropriate
adjustments.
There appears to be some prior art for this approach. A quick search
shows that at least QEMU is using this approach. It also appears to
work on Linux with systemtap's dtrace and on FreeBSD.
This may regress cross-compilation because the dtrace command will have
no way of knowing which compiler we intend for it to use to produce the
object file. I say "may" because I don't know if dtrace ever worked in
the first place under cross-compilation.
https://bugzilla.gnome.org/show_bug.cgi?id=725902
Some compilers have trouble with such sequences. Visual C++ may or may
not generate a warning in this particular case depending on if the
local code page supports an ellipsis.
https://bugzilla.gnome.org/show_bug.cgi?id=767218
glib installs a gdb helper file named `glib.py`.
Then the "hook" file updates `sys.path` and does `import glib`.
This will fail if glib has already been imported into gdb, say
using `from gi.repository import GLib`. This is due to a namespace clash.
One fix would be to rename the gdb helper files to not clash with
other Python modules. This should be done for all such helper files.
https://bugzilla.gnome.org/show_bug.cgi?id=760186
v_long is 32 bits on Win64, v_pointer is 64 bits. On most other platforms the
size of long and pointer is the same, so it's usually not a problem.
https://bugzilla.gnome.org/show_bug.cgi?id=758738
Rather than calculating it at configure time. This means it can expand
$libdir properly, and use the Make $(realpath) function rather than
invoking the non-portable `readlink -f`.
This fixes problems where `readlink` would be called on an invalid path
(due to a variable not being expanded) and would evaluate to "", which
would then cause things to be installed in the wrong place.
https://bugzilla.gnome.org/show_bug.cgi?id=744772
This reverts commit a3a9664ed2.
Constifying the autogenerated get_instance_private functio makes C++
compilers and GCC with -Wcast-qual warn during compilation of GLib and
projects depending on GLib.
Since using const with GObject instances is not a common coding
practice, it's better to revert than trying to make every sigle GType
function const-safe (and possibly add more compiler warnings in the
process).
https://bugzilla.gnome.org/show_bug.cgi?id=745068
This reverts commit 52f23db74a.
Constifying these macros make C++ compilers and GCC with -Wcast-qual
warn during compilation of GLib and projects depending on GLib.
Since using const with GObject instances is not a common coding
practice, it's better to revert than trying to make every sigle GType
function const-safe (and possibly add more compiler warnings in the
process).
https://bugzilla.gnome.org/show_bug.cgi?id=745068
Add ref-func, unref-func, set-value-func, and get-value-func annotations to
GParamSpec so that it can be managed generically as a fundamental type with
introspection.
https://bugzilla.gnome.org/show_bug.cgi?id=710243
Add various (nullable) and (optional) annotations which were missing
from a variety of functions. Also port a couple of existing (allow-none)
annotations in the same files to use (nullable) and (optional) as
appropriate instead.
Secondly, add various (not nullable) annotations as needed by the new
default in gobject-introspection of marking gpointers as (nullable). See
https://bugzilla.gnome.org/show_bug.cgi?id=729660.
This includes adding some stub documentation comments for the
assertion macro error functions, which weren’t previously documented.
The new comments are purely to allow for annotations, and hence are
marked as (skip) to prevent the symbols appearing in the GIR file.
https://bugzilla.gnome.org/show_bug.cgi?id=719966
Now that we initialize the quark tables from a constructor,
reloading libglib is just as bad as reloading libgobject,
so add the linker option to the LDFLAGS for all our libraries.
https://bugzilla.gnome.org/show_bug.cgi?id=755609
It seems that VS 2015 optimizes out the constructor on windows,
so it is better to use a DllMain to initialize the library
and keep using a normal constructor on the other platforms.
This research was done by Arnav Singh.
https://bugzilla.gnome.org/show_bug.cgi?id=752837
If --prefix is specified, marshaller_prefix is allocated and never
freed. It does not actually have to be allocated — just use the static
string from argv.
Coverity CID: 1325370
This reverts commit 8e362161d9.
There is a fundamental difference between g_value_peek_pointer() and
g_value_get_pointer(), and it's not just complexity: the latter checks
if the GValue holds a pointer type, whereas the former doesn't.
https://bugzilla.gnome.org/show_bug.cgi?id=755922
g_value_unset() only works with initialized value and will assert
if the GValue is zero-filled (or initialized with G_VALUE_INIT). Document
this behaviour and refer to g_value_clear() for a method that work on
both initialized and zero-filled GValue.
https://bugzilla.gnome.org/show_bug.cgi?id=755766
This change allow leaving a scope before g_value_init() has been
called. This would happen if you do:
{
g_auto(GValue) value = G_VALUE_INIT;
}
Or have a return statement (due to failure) before the part of
your code where you set this GValue.
https://bugzilla.gnome.org/show_bug.cgi?id=755766
This will not catch the case where we fail in libffi and always use 0.
In fact, be a real annoying person and use (1 << 31) as a flags value to
test signedness, too.
Also update the testcase to actually use flags everywhere and ot uint.
https://bugzilla.gnome.org/show_bug.cgi?id=754882
Keeping these enabled causes too many people to file
bugs against gobject, and not enough people to send
patches to port away from deprecated properties.
This is almost always what you want, because if you're using this you
want to know if any "custom code" (i.e. not the default class closure)
is going to be run if you emit this signal.
I looked at all the existing uses of this and they were all broken in the
presence of g_signal_override_class_closure().
https://bugzilla.gnome.org/show_bug.cgi?id=754986
Make use of the common autotools module that is used to generate the MSVC
project files from their respective templates so that the main build files
beccome cleaner, and enhance them in a way that the headers that should be
installed can be written to the property sheets during 'make dist', so that
the chances of missing headers for MSVC builds can be greatly reduced.
Also use this autotools module to fill in the projects for
glib-compile-schemas and glib-compile-resources.
https://bugzilla.gnome.org/show_bug.cgi?id=735429
We don't need to run binaries we just built in order to successfully
build GLib and friends any more.
Since commit b74e2a7, we don't need to run glib-genmarshal when building
GIO; since commit f9eb9eed, all our tests (including the ones that do
need to run binaries we just built) are only built when running "make
check", instead of unconditionally at every build.
This means that we don't need to check for existing, native binaries
when cross-compiling, and fail the configuration step if they are not
found — which also means that you don't need to natively build GLib for
your toolchain, in order to cross-compile GLib.
We can also use the cross-compilation conditional, and skip those tests
that require a binary we just built in order to build.
https://bugzilla.gnome.org/show_bug.cgi?id=753745
It’s quite common to see naked g_signal_connect() calls without a paired
g_signal_handler_disconnect(). This is commonly a bug which could lead
to uses of the callback user data after it’s been freed.
Document the best practices for avoiding this kind of bug by properly
disconnecting all signal handlers.
https://bugzilla.gnome.org/show_bug.cgi?id=741779
Make it a little easier to find the GType conventions page, which I
guess should be the canonical guide to how to name things.
This adds a brief mention of the valid characters in a type name to the
conventions page.
https://bugzilla.gnome.org/show_bug.cgi?id=743018
We already do this in the normal case, might as well support it for the
dynamic type module case as well. This prevents seeing a warning when not
using the get_instance_private() in the dynamic type.
Using the register keyword triggers warnings on noteworthy compilers
(clang), since it's deprecated in C++ and at danger of being removed
from the language. There is no reason to use it since it isn't 1980
anymore.
https://bugzilla.gnome.org/show_bug.cgi?id=750918
Prevents race condition in function g_io_condition_get_type by ensuring
that the initialization section for 'etype' is executed only once
during a program's life time, and that concurrent threads are blocked
until initialization completes. This changes solves the problem that
concurrent threads could execute the check 'etype == 0' before any of
them had initialized it, which in turn meant that multiple threads
would then attempt to register the "GIOCondition" type.
https://bugzilla.gnome.org/show_bug.cgi?id=750386
It isn't actually doing anything, instead it is
being managed without actually being used.
This has the result that GBinding is now more
thread-safe.
https://bugzilla.gnome.org/show_bug.cgi?id=745013
Add a global lookup table for signal handlers. We already give
them a unique ID, so there is no good reason to pay for
non-constant lookups when disconnecting handlers.
https://bugzilla.gnome.org/show_bug.cgi?id=737009
This test checks the performance of connecting, disconnecting and
blocking many handlers. Various cases are checked: disconnect in
the same order, in the inverse order, at random. Connect to one
signal on a single object, to two signals on the same object, or
to the same signal on two different objects.
https://bugzilla.gnome.org/show_bug.cgi?id=737009
Restricting the number of children to be less than 4095 can
be an issue when generating types. This is also an issue for
the Lua bindings as each Lua state will create a new GType each
time the Lua code is executed.
https://bugzilla.gnome.org/show_bug.cgi?id=747882
I searched all files that mention g_test_run, and replaced most
g_print() calls. This avoids interfering with TAP. Exceptions:
* gio/tests/network-monitor: a manual mode that is run by
"./network-monitor --watch" is unaffected
* glib/gtester.c: not a test
* glib/gtestutils.c: not a test
* glib/tests/logging.c: specifically exercising g_print()
* glib/tests/markup-parse.c: a manual mode that is run by
"./markup-parse --cdata-as-text" is unaffected
* glib/tests/testing.c: specifically exercising capture of stdout
in subprocesses
* glib/tests/utils.c: captures a subprocess's stdout
* glib/tests/testglib.c: exercises an assertion failure in g_print()
Bug: https://bugzilla.gnome.org/show_bug.cgi?id=725981
Reviewed-by: Colin Walters <walters@verbum.org>
Signed-off-by: Simon McVittie <simon.mcvittie@collabora.co.uk>
GClosure has been in the "allocate area before the pointer" game since
before we did this with GTypeInstance. At the time that this was done
for GClosure, we didn't have valgrind.h in GLib.
Now that we do, we should add similar valgrind hints as the ones we did
for GTypeInstance. This substantially reduces reports of "possibly
lost" on pretty much any program that makes use of signals.
https://bugzilla.gnome.org/show_bug.cgi?id=739850
It’s quite common to see a g_param_spec_pointer() used for GObject or
boxed types which, while not incorrect, does make memory management
unsafe, since no copying or reference counting can be performed
automatically.
Similarly, people often use g_param_spec_boolean() when an enum would be
more appropriate, cf.
http://blog.ometer.com/2011/01/20/boolean-parameters-are-wrong/
Using enums also means that the set of allowable values can be extended
in future if needed.
In the hope that people who write code like that read the documentation,
mention the more specific types in the documentation.
https://bugzilla.gnome.org/show_bug.cgi?id=741779
This is pure read-only access to an external struct
so void warnings for people calling it from const
contexts such as accessors
https://bugzilla.gnome.org/show_bug.cgi?id=745068
Signed-off-by: Marc-Antoine Perennou <Marc-Antoine@Perennou.com>
switching to the old macros boilerplate to G_DECLARE_*
a lot of warnings start to pop when *_IS_A_* or such are
called from a const context.
Fix this by taking const pointers as parameters
https://bugzilla.gnome.org/show_bug.cgi?id=745068
Signed-off-by: Marc-Antoine Perennou <Marc-Antoine@Perennou.com>
This would allow bindings to use _get_option_group() functions, which
would then allow them to use GOption parsing.
This also adds introspection annotations to
g_option_context_add_group(), g_option_context_set_main_group() and
g_option_context_get_main_group().
https://bugzilla.gnome.org/show_bug.cgi?id=743349
Document each of the baked-in CClosure marshallers that we have in
gobject, along with their #GVaClosureMarshal equivalents.
Based on a patch from Xavier Claessens <xavier.claessens@collabora.com>.
Use the (private) _GLIB_DEFINE_AUTOPTR_CHAINUP macro for
G_DECLARE_DERIVABLE_TYPE and G_DECLARE_FINAL_TYPE so that we will
attempt to typedef and define items necessary for GCC
__attribute__((cleanup)) on, well, GCC only.
This fixes the build on non-GCC.
https://bugzilla.gnome.org/show_bug.cgi?id=743640
Automatically add support for the new cleanup macros to the type
declaration macros.
This is an API break because now your parent class needs to support
cleanup if you want to use G_DECLARE_*_TYPE. These macros are only 1
day old, however, so that's probably not a big problem (and we are
already busy adding the macros all over GLib and Gtk+).
https://bugzilla.gnome.org/show_bug.cgi?id=743640
Add G_DECLARE_DERIVABLE_TYPE() and G_DECLARE_FINAL_TYPE() to allow
skipping almost all of the typical GObject boilerplate code.
These macros make some assumptions about GObject best practice that mean
that they may not be usable with older classes that have to preserve
API/ABI compatibility with a time before these practices existed.
https://bugzilla.gnome.org/show_bug.cgi?id=389585
Using G_STRLOC ends up embedding unique strings of the form
__FILE__:__LINE__ in the compiled binary. We can avoid these
by passing __FILE__ and __LINE__ separately when constructing
the warning text.
This probably reduces the size of the binary as __FILE__ is
likely already contained as string otherwise.
Note that for GCC 2.x this changes behavior because G_STRLOC
also contained __PRETTY_FUNCTION__.
https://bugzilla.gnome.org/show_bug.cgi?id=741654
Along the same lines as g_clear_object(), g_set_object() is a
convenience function to update a GObject pointer, handling reference
counting transparently and correctly.
Specifically, it handles the case where a pointer is set to its current
value. If handled naïvely, that could result in the object instance
being finalised. In the following code, that happens when
(my_obj == new_value) and the object has a single reference:
g_clear_object (&my_obj);
my_obj = g_object_ref (new_value);
It also simplifies boilerplate code such as set_property()
implementations, which are otherwise long and boring.
Test cases included.
https://bugzilla.gnome.org/show_bug.cgi?id=741589
Add GOBJECT_DEBUG=instance-count which enables internal accounting
of the number of instances of each GType, and g_type_get_instance_count()
to retrieve the result.
https://bugzilla.gnome.org/show_bug.cgi?id=354457
Not all instances have a TypeNode associated (e.g. GstEvent), so lets check if node is available
before trying to use it.
This crash can be easily reproduced by creating an event with gst_event_new_eos and using
G_IS_OBJECT on the event instance.
https://bugzilla.gnome.org/show_bug.cgi?id=733982
Practically no caller of these functions require atomic behaviour,
but the atomics are much slower than normal operations, which makes
it desirable to get rid of them. We have not done this before because
that would be a break of the ABI.
However, I recently looked into this and it seems that even if the
atomics *are* used for g_clear_* it is not ever safe to use this. The
atomics protects two threads that are racing to free a global/shared
object from freeing the object twice. However, any *user* of the global
object have no protection from the object being freed while in use,
because there is no paired operation the reads and refs the object
as an atomic unit (nor can such an operation be implemented using
purely atomic ops).
So, since nothing could safely have used the atomic aspects of these
functions I consider it acceptable to just remove it.
https://bugzilla.gnome.org/show_bug.cgi?id=733969
Don't emit property deprecation warnings for construct properties that
are being set to their default value during construction, but _do_ emit
them in all cases when the property was explicitly given to
g_object_new().
https://bugzilla.gnome.org/show_bug.cgi?id=732184
By default G_PARAM_DEPRECATED means absolutely nothing. We only emit a
warning if G_ENABLE_DIAGNOSTIC is set to '1' and then, only on sets.
Turn the logic on its head: emit the warning by default, unless
G_ENABLE_DIAGNOSTIC is set to 0. In order to avoid a torrent of output, only
emit a warning once per property name.
https://bugzilla.gnome.org/show_bug.cgi?id=732184
Used for the commonly used case (in signal emission) where we
initialize and set a GValue for an instance
Includes a fast-path for GObject
Overall makes it 6 times faster than the previous combination
of g_value_init + g_value_set_instance
Makes signal emission around 10% faster
https://bugzilla.gnome.org/show_bug.cgi?id=731950
These cause a static analyzer to think we're trying to actually handle
them being NULL, which is not the case. They both must not be NULL,
period.
No idea why the code was like this originally.
Reviewed by mclasen on IRC.
GParamSpec has a possibility of user-introduced flags, and we didn't
respect that with the addition of _EXPLICIT_NOTIFY.
Change the documentation for the maximum number of user flags to 10,
just to pick a somewhat random number. The documentation here was never
correct anyway -- it previously claimed that as many as 38 flags were
possible.
Meanwhile, move G_PARAM_EXPLICIT_NOTIFY next to _DEPRECATED in order to
avoid conflicts with low-numbered user flags (which are in use by at
least evolution-data-server).
https://bugzilla.gnome.org/show_bug.cgi?id=731341
A year ago, we tried to remove support for adding interfaces on
already-initialised types. There were problems with the C++ and C#
bindings at the time, so we added exceptions to give them a bit more
time to catch up.
It's already one cycle after when these exceptions were planned to be
removed, so let's take them out now.
https://bugzilla.gnome.org/show_bug.cgi?id=697229
Leave ourselves a little wiggle room: if people install properties after
initialisation then we reserve the right to handle that in a way that
may not be threadsafe.
https://bugzilla.gnome.org/show_bug.cgi?id=698614
g_type_is_fundamentally_a (see bug 730984) is a new API/ABI and is
marked with a version macro. We should therefore avoid its
unconditional use from G_IS_OBJECT() and G_IS_PARAM_SPEC() which are
APIs that have been around for a long time.
This prevents deprecation warnings from being emitted when these
functions are used with an older GLIB_VERSION_MAX_ALLOWED and also
prevents linking to the new ABI in that case (so that it's possible to
use the resulting binary with an older version of GLib).
https://bugzilla.gnome.org/show_bug.cgi?id=731335
Add a flag to prevent the automatic emission of the "notify" signal
during g_object_set_property().
If this flag is set then the class must explicitly emit the notify
for themselves. This is already standard practice on most classes, but
we cannot simply remove the existing behaviour because there are surely
many cases where it is needed.
https://bugzilla.gnome.org/show_bug.cgi?id=731200
Construct properties are always set during construction.
It makes no sense to warn about this even if the property
is marked as deprecated; the deprecation warning should
only be issues for explicit uses of the property after
construction.
https://bugzilla.gnome.org/show_bug.cgi?id=730045
- GSubprocessLauncher exists since 2.40, not 2.36
- more logical order for g_markup functions
- fix short description of GMarkup
- GMarkupParser: specify that some parameters are NULL-terminated.
- g_string_new (NULL); is possible.
- other trivial fixes.
https://bugzilla.gnome.org/show_bug.cgi?id=728983
On initialisation, GObject guarantees to zero-fill
class/object/interface structures. Document this so people don’t spend
forever writing:
my_object->priv->some_member = NULL;
my_object->priv->some_other_member = NULL;
https://bugzilla.gnome.org/show_bug.cgi?id=729167
These did show up in the html. Since symbol names are checked for a
trailing plural s when generating the docs, the links stay functional
after removing these comments.
https://bugzilla.gnome.org/show_bug.cgi?id=728380
Since the type system does not support reloading its data and assumes
that libgobject remains loaded for the lifetime of the process, we
should link libgobject with a flag indicating that it can't be unloaded.
https://bugzilla.gnome.org/show_bug.cgi?id=707298
We have a configure.ac check for lib.exe that attempts to enable
creation of .lib files for our 5 public libraries. That has been broken
for a long time for two reasons:
1) the Makefiles hardcode 'lib' instead of 'lib.exe'
2) we dropped generation of .def files quite some time ago (except for
in gthread where we have the two-symbol file under version control)
Add new rules for creating .def files from dumpbin.exe (which you should
have if you have lib.exe) and fix the .lib rules to use lib.exe.
Add a bit of $(AM_V_GEN) all around, as well.
https://bugzilla.gnome.org/show_bug.cgi?id=722033
Although returning NULL from constructor is strongly discouraged, some
old libraries need to keep doing it for ABI-compatibility reasons.
Given this, it's rude to forbid finalization from within
constructor(), since it would otherwise work correctly now anyway (and
the critical when returning NULL should discourage any new uses of
returning NULL from constructor()).
https://bugzilla.gnome.org/show_bug.cgi?id=661576
Since we are no longer using sgml mode, using /* */ to
escape block comments inside examples does not work anymore.
Switch to using line comments with //
Since all element markup is now gone from the doc comments,
we can turn off the gtk-doc sgml mode, which means that from
now on, docbook markup is no longer allowed in doc comments.
To make this possible, we have to replace all remaining
entities in doc comments by their replacement text, & -> &
and so on.
If two GValues are transformable, it implies they are compatible,
so you do not need to check for compatibility yourself. Bump the
documentation to reflect this fact.
https://bugzilla.gnome.org/show_bug.cgi?id=707111
Stock GDB (both versions 7.0 and 7.1) does not come with the new
backtrace code and python API. To prevent an ugly python backtrace when
auto-loading gobject.py, let's catch the exception and not register the
FrameWrapper and the FrameFilter.
https://bugzilla.gnome.org/show_bug.cgi?id=613732
This is really just a very crude and limited conditional breakpoint.
Update the documentation to explain conditional breakpoints in
gdb instead. Also, remove the link to refdbg, which appears dead.
https://bugzilla.gnome.org/show_bug.cgi?id=719687
Take this test out of 'make check'. It's causing problems for a lot of people
due to fact that it's essentially a forkbomb. It's causing failures for Debian
on ARM and it's DoSing coredumps to system crash collectors.
The conditional only covers registration of the master, not the
subprocess parts. This is because g_test_slow() always return FALSE in
the subprocesses, so they would fail to run if we didn't register them
unconditionally.
This is the sole piece of code in GLib where we make use of the
stack growing direction. And this test proves that we have been
getting the direction wrong all these years...
The signals queued while notify is frozen are emitted in
reverse order, while omitting duplicates. The lack of documentation
for this was pointed out in
https://bugzilla.gnome.org/show_bug.cgi?id=607016
In Windows development environments that have it, <unistd.h> is mostly
just a wrapper around several other native headers (in particular,
<io.h>, which contains read(), close(), etc, and <process.h>, which
contains getpid()). But given that some Windows dev environments don't
have <unistd.h>, everything that uses those functions on Windows
already needed to include the correct Windows header as well, and so
there is never any point to including <unistd.h> on Windows.
Also, remove some <unistd.h> includes (and a few others) that were
unnecessary even on unix.
https://bugzilla.gnome.org/show_bug.cgi?id=710519
Assume all supported platforms implement C90, and therefore they
(correctly) implement atexit(), memmove(), setlocale(), strerror(),
and vprintf(), and have <float.h> and <limits.h>.
(Also remove the configure check testing that "do ... while (0)" works
correctly; the non-do/while-based version of G_STMT_START and
G_STMT_END was removed years ago, but the check remained. Also, remove
some checks that configure.ac claimed were needed for libcharset, but
aren't actually used.)
Note that removing the g_memmove() function is not an ABI break even
on systems where g_memmove() was previously not a macro, because it
was never marked GLIB_AVAILABLE_IN_ALL or listed in glib.symbols, so
it would have been glib-internal since 2004.
https://bugzilla.gnome.org/show_bug.cgi?id=710519
GMappedFile is current unintrospectable, because it's not a registered
box type. It already has reference counting functions, so there's
little reason not to box it.
This commit adds GMappedFile to the hoard of other boxes types handled
by gboxed.c
https://bugzilla.gnome.org/show_bug.cgi?id=712393
Rather than keeping a global list of objects that are being
constructed, use qdata on the object itself like we do with several
other properties now.
https://bugzilla.gnome.org/show_bug.cgi?id=661576
If a constructor() implementation created an object but then unreffed
it rather than returning it, that object would get left on the
construction_objects list, which would cause problems later when that
memory location got reused by another object.
"Fix" this by making it fail intentionally, and add a test for it (and
for the normal, working singleton case).
https://bugzilla.gnome.org/show_bug.cgi?id=661576
GBindingTransformFunc called its arguments "source_value" and
"target_value", but in the transform_from function of a bidirectional
binding, "source_value" comes from the target object, and
"target_value" comes from the source object, which quickly gets
confusing if you need to use g_binding_get_source(), etc, in the
function.
Of course developers can call their transform function arguments
whatever they want, but many will copy from the headers/docs to start
out, so use less confusing names here ("from_value" and "to_value").
Also, fix the documentation to describe the bidirectional case
correctly.
https://bugzilla.gnome.org/show_bug.cgi?id=709440
Add NULL check and return after calls to g_param_spec_internal in GParamSpec
creation functions. This avoids glib crashing due to things like badly named
properties.
https://bugzilla.gnome.org/show_bug.cgi?id=707887
Apple's GCC compilers cannot deal well with 64-bit pointers in
transparent unions on ppc64, so compilation of
_G_DEFINE_BOXED_TYPE_BEGIN was failing. Fortunately glib already
provides a fallback for compilers that can't deal with it; this adds
this specific case to the check.
https://bugzilla.gnome.org/show_bug.cgi?id=647145
g_type_class_add_private() was doing
g_assert (node->data->instance.private_size <= 0xffff);
but that field is a guint16, so the check was a no-op. (Noticed by
clang, but not gcc for some reason.) Fix it to do the math in a gssize
variable and do the bounds checking there before updating the struct
field.
https://bugzilla.gnome.org/show_bug.cgi?id=706888
Convert {glib,gobject,gio}/tests to use the automake TAP driver
and test harness instead of gtester. To do so, we add a glib-tap.mk
that provides the same interface as glib.mk, except for the
reporting and coverage testing functionality. Eventually, we may
want to replace glib.mk with it. I've not yet converted the
toplevel tests/ directory, since it mixes gtestutils tests with
other binaries.
https://bugzilla.gnome.org/show_bug.cgi?id=692125
Fix the warnings when compiling and linking the probes files by
calling dtrace with all the -W flags removed from CFLAGS (since dtrace
generates bad C code), and with CC set to "libtool --mode=compile ..."
(so that it will output a proper .lo file and libtool won't warn when
linking it into the .la).
https://bugzilla.gnome.org/show_bug.cgi?id=693335
Just like g_object_notify, check for a zero ref_count in
g_object_notify_by_pspec and leave if it is 0.
This allows using functions in ->finalize() that possibly also
notify a property change on the object. Previously,
this resulted in an error from g_object_ref.
https://bugzilla.gnome.org/show_bug.cgi?id=705570
We need a TypeName_private_offset variable defined by the macros used to
register dynamic types. We also need to call the adjust_private_offset()
function inside class_init(). G_ADD_PRIVATE_DYNAMIC only sets the size
of the private data structure, and relies on the behaviour of the
g_type_class_adjuset_private_offset() function to register the private
data structure at class init time if passed a value greater than zero.
This allows using G_PRIVATE_OFFSET with dynamic types.
Otherwise in e.g. the gnome-ostree integrationtest system, we
end up sending SIGUSR1 to the *entire session*, which triggers
various badness in untested debugging paths from gnome-session.
This test worked when compiled without optimization, but fails with
-O2. Presumably we just happened to find the GMainLoop off the stack
somewhere.
https://bugzilla.gnome.org/show_bug.cgi?id=704267
GPid is a HANDLE (aka void *) on Windows, not an int, so treat pid
accordingly on Windows, as using pid as a gulong directly would likely be
undesirable on Windows
https://bugzilla.gnome.org/show_bug.cgi?id=704447
- Mention G_SOURCE_CONTINUE and G_SOURCE_REMOVE in the GSourceFunc doc;
- Mention G_PARAM_READWRITE and G_PARAM_STATIC_STRINGS in the
GParamFlags doc;
- Fix "Since:" version for G_DEFINE_ABSTRACT_TYPE_WITH_PRIVATE;
- Fix typo.
https://bugzilla.gnome.org/show_bug.cgi?id=704250
For the glib-defined source types, and any source type that defines a
closure callback but not a closure marshal, use
g_cclosure_marshal_generic. And then remove all the other remaining
source closure marshals.
https://bugzilla.gnome.org/show_bug.cgi?id=701511
When using the GLIB_VERSION_MAX_ALLOWED macro to define the upper bound
of allowed API the G_DEFINE_TYPE_EXTENDED starts warning about the newly
added g_type_class_adjust_private_offset() function; this effectively
introduces a run-time dependency on GLib 2.38 even if we don't use its
API explicitly.
https://bugzilla.gnome.org/show_bug.cgi?id=703191
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
We have turned up enough cases of this being done (including GTK API
allowing apps to do this to GtkSettings well after it has been
instantiated) that it is clear that we cannot really break this feature
while claiming to be backwards compatible.
For that reason, it becomes a warning rather than a critical (ie: it is
still well-defined behaviour, but you are discouraged from doing it).
The intention is to keep this feature for at least the next while.
A given GObjectClass will be able to avoid using GParamSpec pool for as
long as you don't install properties after init. If you do that, you
will get a warning and we will devolve to using GParamSpecPool.
https://bugzilla.gnome.org/show_bug.cgi?id=698614
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.
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.
A previous patch asserted that this was not true and we had to revert it
because it broke the shell. Instead of reverting, we should have used a
critical, so do that now.
Complaints go to this bug:
https://bugzilla.gnome.org/show_bug.cgi?id=698614
We previously hold a lock in the loop that collects the arguments for
g_signal_emit(), which we drop before calling into the argument
collection functions and reacquire again at the bottom of the loop (ie:
one release/acquire pair for each argument collected). To make matters
worse, the lock is just released again after the loop.
Presumably that was done to protect the access to the parameter array,
but it's pretty unlikely that this is needed because the only way it
changes is if the signal is unloaded. That only happens when unloading
types which is quite unlikely to happen while we are emitting on an
instance of that type (and, as an aside, never happens anymore anyway).
If we move the unlock below the loop up above it and remove the
acquire/release pair from the loop, we improve performance in the new
arg-collecting performance tests by ~15% (more like ~18% in the case
where we only emit to one handler -- where argument collection dominates
more).
https://bugzilla.gnome.org/show_bug.cgi?id=694380
Back in the far-off twentieth century, it was normal on unix
workstations for U+0060 GRAVE ACCENT to be drawn as "‛" and for U+0027
APOSTROPHE to be drawn as "’". This led to the convention of using
them as poor-man's ‛smart quotes’ in ASCII-only text.
However, "'" is now universally drawn as a vertical line, and "`" at a
45-degree angle, making them an `odd couple' when used together.
Unfortunately, there are lots of very old strings in glib, and also
lots of new strings in which people have kept up the old tradition,
perhaps entirely unaware that it used to not look stupid.
Fix this by just using 'dumb quotes' everywhere.
https://bugzilla.gnome.org/show_bug.cgi?id=700746
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
There is some code in the wild (like in gnome-session) that does this
from its custom _constructor() implementation:
{
GObject *obj;
obj = ((chain up));
if (!object_is_viable (obj))
{
g_object_unref (obj);
return NULL;
}
else
return obj;
}
This has never been a valid use of GObject and this code has always
caused memory to be leaked[1] by growing the construction_objects list.
The ability to legitimately return NULL from a constructor was exactly
the reason that we created GInitable, in fact.
That doesn't change the fact that the g_object_new() rewrite will crash
in this case, so instead of doing that, let's emit a critical and avoid
the crash. This will allow people to upgrade their GLib without also
upgrading their gnome-session. Meanwhile, people can fix their broken
code.
[1] not in the strictest sense of the word, because it's still reachable
Make a number of improvements to g_object_new():
- instead of looking up the GParamSpec for the named property once in
g_object_new() (in order to collect) and then again in g_object_newv
(when actually setting the property), g_object_new_internal() is a
new function that takes the GParamSpec on the interface to avoid the
second lookup
- in the case that ->constructor() is not set, we need not waste time
creating an array of GObjectConstructParam to pass in. Just directly
iterate the list of parameters, calling set_property() on each.
- instead of playing with linked lists to keep track of the construct
properties, realise that the number of construct properties that we
will set is exactly equal to the length of the construct_properties
list on GObjectClass and the only thing that may change is where the
value comes from (in the case that it was passed in)
This assumption was already implicit in the existing code and can be
seen from the sizing of the array used to hold the construct
properties, but it wasn't taken advantage of to make things simpler.
- instead of allocating and filling a separate array of the
non-construct properties just re-iterate the passed-in list and set
all properties that were not marked G_PARAM_CONSTRUCT (since the ones
that were construct params were already used during construction)
- use the new g_param_spec_get_default_value() API instead of
allocating and setting the GValue for each construct property that
wasn't passed from the user
Because we are now iterating the linked list of properties in-order we
need to append to that list during class initialising instead of
prepending.
These changes show a very small improvement on the simple-construction
performance testcase (probably just noise) and they improve the
complex-construction case by ~30%.
Thanks to Alex Larsson for reviews and fixes.
https://bugzilla.gnome.org/show_bug.cgi?id=698056
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
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).
