As we use pthread_rwlock_*() to implement GRWLock (on Unix), the
priority of readers vs writers when trying to acquire a lock already
held by one reader with a writer queued, is unspecified. i.e. We don’t
explicitly prioritise the pending readers to acquire the lock (and block
the writer), or vice-versa.
Whatever our implementation on other platforms, we must document the
priority as unspecified, as that’s what happens on Unix and is the
least restrictive API guarantee we can make.
Prompted by https://stackoverflow.com/q/52661672/2931197.
Signed-off-by: Philip Withnall <withnall@endlessm.com>
By using PKG_CHECK_VAR, we declare $GLIB_COMPILE_SCHEMAS,
$GLIB_GENMARSHAL, $GOBJECT_QUERY, $GLIB_MKENUMS and
$GLIB_COMPILE_RESOURCES as Autoconf "precious variables" with AC_ARG_VAR,
similar to $PKG_CONFIG and $CC, so that they can be put on a configure
command line:
./configure GLIB_COMPILE_RESOURCES=my-glib-compile-resources
If they are set to a non-empty value, PKG_CHECK_VAR will use that
instead of auto-detecting from pkg-config, so that builders can
override them, for example when cross-compiling.
Similarly, use the standard PKG_CHECK_MODULES macro to get GLib's CFLAGS
and LIBS.
It's possible that most of the rest of each macro can also disappear,
but for the moment I've given them the benefit of the doubt.
This does result in printing "checking for GLIB" twice (once for
PKG_CHECK_MODULES and once for GLib's custom checks), but if you're
using Autotools, you probably don't have a strong objection to overly
verbose output.
Signed-off-by: Simon McVittie <smcv@collabora.com>
When using glib as a meson subproject on Windows the build currently fails
due to too long paths during the build process. See
https://github.com/mesonbuild/meson/issues/4226 for the upstream bug.
To work around the issue shorten the filenames of the generated gdbus files.
The tests were making assumptions about the order of the returned D-Bus
introspection nodes. However, these are semantically unordered and
changes to e.g. GHashTable would break the tests.
Fix this by applying a sort prior to validation.
We still clear the key/value on removal, but since we're growing the
arrays with realloc() now, we can't guarantee that incoming memory is
cleared. There's no reason it should be either, since we check the
hashes array (which is always in a defined state) before accessing the
other arrays.
When g_hash_table_resize() gets called, we clear out tombstones and grow
the table at the same time if needed. However, the threshold was set too
low, so we'd grow if the load was greater than .5 after subtracting
tombstones. Increase this threshold to ~.75.
When resizing, we were keeping both the old and new hash, key and value
arrays around while we reinserted entries, resulting in a peak memory
overhead of 50%. Using a temporary bookkeeping array with one bit per
entry we can now grow and shrink the main arrays using realloc() and an
eviction scheme, reducing the overhead to .625% (assuming 64-bit keys and
values). Tests show the CPU overhead is negligible.
If int is smaller than void * on our arch, we start out with
int-sized keys and values and resize to pointer-sized entries as
needed. This saves a good amount of memory when the HT is being
used with e.g. GUINT_TO_POINTER().
I’m fed up of trying to read these and having my head done in by mixed
tabs and spaces.
This introduces no functional changes.
Signed-off-by: Philip Withnall <withnall@endlessm.com>
This partially reverts commit bfc362cb68.
The FreeBSD CI runner still seems to be a bit flakey, and appears to be
offline entirely at the moment.
Signed-off-by: Philip Withnall <withnall@endlessm.com>
Reviewed-by: nobody
There are a lot of gbooleans in the private GTask struct, which seems a
bit wasteful. Use a bitfield to compress the struct a bit.
This reduces the size of the struct from 216 bytes to 168 bytes on my
64-bit machine.
One of the fields needs to remain separate, since it’s used from a
TRACE() macro which calls typeof() on it.
Signed-off-by: Philip Withnall <withnall@endlessm.com>
These functions already check to see if a successful result has already
been returned; expand them to also check to see if an error has been
returned.
We can’t just check GTask.result_set, as that’s actually an indicator
for whether the GTask.result member is filled — when
g_task_propagate_*() is called, it’s cleared again. We need a new state
bit.
Signed-off-by: Philip Withnall <withnall@endlessm.com>
https://gitlab.gnome.org/GNOME/glib/issues/1525
This method drops the last reference *it* owns to the GTask, but then
continues to call methods on the GTask. This wasn’t resulting in
failures because a ref in another thread kept the GTask alive, but
that’s quite dodgy.
Signed-off-by: Philip Withnall <withnall@endlessm.com>
The X-Flatpak-RenamedFrom key is used in .desktop files to identify past
names for the desktop file. It is defined to be a list of strings.
However, there was previously no correct way to retrieve a list of
strings from the GKeyFile wrapped by GDesktopAppInfo, short of
re-parsing the file with GKeyFile.
Note that doing something like:
g_strsplit (g_desktop_app_info_get_string (...), ";", -1)
is not correct: the raw value "a\;b;" represents the one-element list
["a;b"], but g_key_file_get_string() rejects the sequence "\;", and so
g_desktop_app_info_get_string() returns NULL in this case. (Of course, a
.desktop file with a semicolon in its name is a pathological case.)
Add g_desktop_app_info_get_string_list(), a trivial wrapper around
g_key_file_get_string_list(), similar to g_desktop_app_info_get_string()
and co.
The change from g_key_file_free() to g_key_file_unref() in the test is
needed because g_key_file_free() clears the contents of the keyfile.
This is fine for all the fields which are eagerly loaded and copied into
GDesktopAppInfo, but not when we want to access arbitrary stuff from the
keyfile.
This avoids the convenience library being treated as though it was
an installed static library (objects not included in the dependent
static library, and convenience library being listed in the pkg-config
metadata), both of which would make static linking impossible.
This is a workaround for meson not having
https://github.com/mesonbuild/meson/pull/3939 merged yet.
Fixes: https://gitlab.gnome.org/GNOME/glib/issues/1536
Signed-off-by: Simon McVittie <smcv@collabora.com>
If we tell clang that we're passing the arguments on to a compatible
printf call, it can see that we're doing it right, and won't warn us
about -Wformat-nonliteral. This follows up from commit abac67c0.
Signed-off-by: Simon McVittie <smcv@collabora.com>
libmount depends on libblkid, so if we statically link a trivial
executable to GIO, we need to pull in both libmount and libblkid.
Linking with -lmount is not enough to achieve that, but recursing
into mount.pc is.
This makes the Autotools build a bit more like the Meson build,
which already puts mount in Requires.private.
Signed-off-by: Simon McVittie <smcv@collabora.com>
Previously, it was installed unmodified by the Meson build system.
We don't need to define @bindir@, because gtester-report never
actually referred to it. We also don't need a definition of
GTESTER_REPORT for use by GLib itself, because its last use was removed
in 2013 (https://bugzilla.gnome.org/show_bug.cgi?id=709995).
Fixes: https://gitlab.gnome.org/GNOME/glib/issues/1544
Signed-off-by: Simon McVittie <smcv@collabora.com>
This is detected by Debian's Lintian tool, which suggests
"allows one to" as a replacement. I've rephrased the documentation
in question to avoid both of those.
Signed-off-by: Simon McVittie <smcv@collabora.com>
