The old implementation was either using CRC32 on modern processors
or a trivial, but rather slow implementation.
We can't continue with CRC32, as that implementation can only
give us 32bit hashes, where we now need to support 64bit in Qt 6.
Change the implementation to use MurmurHash, as public domain
implementation that is both very fast and leads to well distributed hashes.
This hash function is about as fast as the SSE optimized CRC32 implementation
but works everywhere and gives us 64 bit hash values.
Here are some numbers (time for 10M hashes):
14 char 16 char
QByteArray QString float
old qHash (non CRC32) 127ms 134ms 48ms
old qHash (using SSE CRC32 instructions 60ms 62ms 46ms
new qHash 52ms 43ms 46ms
Unfortunately MurmurHash is not safe against hash table DoS attacks, as
potential hash collisions are indepenent of the seed. This will get
addressed in followup commit, where we use SipHash or an SSE optimized
AES based hashing algorithm that does not have those issues.
Change-Id: I4fbc0ac299215b6db78c7a0a2a1d7689b0ea848b
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
At the same time use the opportunity to refactor the
insertion code inside the implementation of QHash to
avoid copy and move constructors as much as possible
and always construct nodes in place.
Change-Id: I951b4cf2c77a17f7db825c6a776aae38c2662d23
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
This is required, so that QHash and QSet can hold more
than 2^32 items on 64 bit platforms.
The actual hashing functions for strings are still 32bit, this will
be changed in a follow-up commit.
Change-Id: I4372125252486075ff3a0b45ecfa818359fe103b
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Make use of the new features available in QHash and do a more
performant implementation than the old one.
Change-Id: Ie74b3cdcc9871cd241aca205672093dc395d04a7
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
A brand new QHash implementation using a faster and more memory efficient data
structure than the old QHash.
A new implementation for QHash. Instead of a node based approach as the old
QHash, this implementation now uses a two stage lookup table. The total
amount of buckets in the table are divided into spans of 128 entries.
Inside each span, we use an array of chars to index into a storage area
for the span.
The storage area for each span is a simple array, that gets (re-)allocated
with size increments of 16 items. This gives an average memory overhead of
8*sizeof(struct{ Key; Value; }) + 128*sizeof(char) + 16 for each span.
To give good performance and avoid too many collisions, the array keeps its
load factor between .25 and .5 (and grows and rehashes if the load factor goes
above .5).
This design allows us to keep the memory overhead of the Hash very small, while
at the same time giving very good performance. The calculated overhead for a
QHash<int, int> comes to 1.7-3.3 bytes per entry and to 2.2-4.3 bytes for
a QHash<ptr, ptr>.
The new implementation also completely splits the QHash and QMultiHash classes.
One behavioral change to note is that the new QHash implementation will not
provide stable references to nodes in the hash when the table needs to grow.
Benchmarking using https://github.com/Tessil/hash-table-shootout shows
very nice performance compared to many different hash table implementation.
Numbers shown below are for a hash<int64, int64> with 1 million entries. These
numbers scale nicely (mostly in a linear fashion with some variation due to
varying load factors) to smaller and larger tables. All numbers are in seconds,
measured with gcc on Linux:
Hash table random random random random reads full
insertion insertion full full after iteration
(reserved) deletes reads deletes
------------------------------------------------------------------------------
std::unordered_map 0,3842 0,1969 0,4511 0,1300 0,1169 0,0708
google::dense_hash_map 0,1091 0,0846 0,0550 0,0452 0,0754 0,0160
google::sparse_hash_map 0,2888 0,1582 0,0948 0,1020 0,1348 0,0112
tsl::sparse_map 0,1487 0,1013 0,0735 0,0448 0,0505 0,0042
old QHash 0,2886 0,1798 0,5065 0,0840 0,0717 0,1387
new QHash 0,0940 0,0714 0,1494 0,0579 0,0449 0,0146
Numbers for hash<std::string, int64>, with the string having 15 characters:
Hash table random random random random reads
insertion insertion full full after
(reserved) deletes reads deletes
--------------------------------------------------------------------
std::unordered_map 0,4993 0,2563 0,5515 0,2950 0,2153
google::dense_hash_map 0,2691 0,1870 0,1547 0,1125 0,1622
google::sparse_hash_map 0,6979 0,3304 0,1884 0,1822 0,2122
tsl::sparse_map 0,4066 0,2586 0,1929 0,1146 0,1095
old QHash 0,3236 0,2064 0,5986 0,2115 0,1666
new QHash 0,2119 0,1652 0,2390 0,1378 0,0965
Memory usage numbers (in MB for a table with 1M entries) also look very nice:
Hash table Key int64 std::string (15 chars)
Value int64 int64
---------------------------------------------------------
std::unordered_map 44.63 75.35
google::dense_hash_map 32.32 80,60
google::sparse_hash_map 18.08 44.21
tsl::sparse_map 20.44 45,93
old QHash 53.95 69,16
new QHash 23.23 51,32
Fixes: QTBUG-80311
Change-Id: I5679734144bc9bca2102acbe725fcc2fa89f0dff
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Add a new QRangeCollection type to store and manage
multiple page ranges. This moves out the parser and validator
logic from the platform dependent (UNIX) dialog and makes it
publicly available from QPrinter.
This improves the usability of QPrinter in those applications
which doesn't use print dialog to configure printer.
(e.g.: QTextDocument, QWebEnginePage)
Change-Id: I0be5a8a64781c411f83b96a24f216605a84958e5
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@qt.io>
* Replaces the, only internaly used, implementation of template
class Median with a fixed size none templated version.
* Replaces BlockSizeManager with an updated BlockSizeManager V2,
but keeping the original name.
* adapt the auto-test to take the fixed size array into account
Change-Id: If76cb944676c4a06a7566ad0bc37ded25b81c70c
Reviewed-by: Sona Kurazyan <sona.kurazyan@qt.io>
In Coin when provisioning for Android, we download and configure
the OpenSSL package, but don't actually build it. This means that
find_package(OpenSSL) can find the headers, but not the library,
and thus the package is marked as not found.
Previously the openssl_headers feature used the result of finding
the OpenSSL package, which led to it being disabled in the above
described Android case.
Introduce 2 new find scripts FindWrapOpenSSL and
FindWrapOpenSSLHeaders. FindWrapOpenSSLHeaders wraps FindOpenSSL,
and checks if the headers were found, regardless of the OpenSSL_FOUND
value, which can be used for implementing the openssl_headers feature.
FindWrapOpenSSL uses FindWrapOpenSSLHeaders, and simply wraps the
OpenSSL target if available.
The find scripts also have to set CMAKE_FIND_ROOT_PATH for Android.
Otherwise when someone passes in an OPENSSL_ROOT_DIR, its value will
always be prepended to the Android sysroot, causing the package not
to be found.
Adjust the mapping in helper.py to use the targets created by these
find scripts. This also replaces the openssl/nolink target.
Adjust the projects and tests to use the new target names.
Adjust the compile tests for dtls and oscp to use the
WrapOpenSSLHeaders target, so that the features can be enabled even
if the library is dlopen-ed (like on Android).
Task-number: QTBUG-83371
Change-Id: I738600e5aafef47a57e1db070be40116ca8ab995
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Conflicts:
examples/opengl/doc/src/cube.qdoc
src/corelib/global/qlibraryinfo.cpp
src/corelib/text/qbytearray_p.h
src/corelib/text/qlocale_data_p.h
src/corelib/time/qhijricalendar_data_p.h
src/corelib/time/qjalalicalendar_data_p.h
src/corelib/time/qromancalendar_data_p.h
src/network/ssl/qsslcertificate.h
src/widgets/doc/src/graphicsview.qdoc
src/widgets/widgets/qcombobox.cpp
src/widgets/widgets/qcombobox.h
tests/auto/corelib/tools/qscopeguard/tst_qscopeguard.cpp
tests/auto/widgets/widgets/qcombobox/tst_qcombobox.cpp
tests/benchmarks/corelib/io/qdiriterator/qdiriterator.pro
tests/manual/diaglib/debugproxystyle.cpp
tests/manual/diaglib/qwidgetdump.cpp
tests/manual/diaglib/qwindowdump.cpp
tests/manual/diaglib/textdump.cpp
util/locale_database/cldr2qlocalexml.py
util/locale_database/qlocalexml.py
util/locale_database/qlocalexml2cpp.py
Resolution of util/locale_database/ are based on:
https://codereview.qt-project.org/c/qt/qtbase/+/294250
and src/corelib/{text,time}/*_data_p.h were then regenerated by
running those scripts.
Updated CMakeLists.txt in each of
tests/auto/corelib/serialization/qcborstreamreader/
tests/auto/corelib/serialization/qcborvalue/
tests/auto/gui/kernel/
and generated new ones in each of
tests/auto/gui/kernel/qaddpostroutine/
tests/auto/gui/kernel/qhighdpiscaling/
tests/libfuzzer/corelib/text/qregularexpression/optimize/
tests/libfuzzer/gui/painting/qcolorspace/fromiccprofile/
tests/libfuzzer/gui/text/qtextdocument/sethtml/
tests/libfuzzer/gui/text/qtextdocument/setmarkdown/
tests/libfuzzer/gui/text/qtextlayout/beginlayout/
by running util/cmake/pro2cmake.py on their changed .pro files.
Changed target name in
tests/auto/gui/kernel/qaction/qaction.pro
tests/auto/gui/kernel/qaction/qactiongroup.pro
tests/auto/gui/kernel/qshortcut/qshortcut.pro
to ensure unique target names for CMake
Changed tst_QComboBox::currentIndex to not test the
currentIndexChanged(QString), as that one does not exist in Qt 6
anymore.
Change-Id: I9a85705484855ae1dc874a81f49d27a50b0dcff7
This requires mostly making moc a bit more permissive, which has the
advantage that it also simplifies the code a little bit.
The newly added test case demonstrates how to connect such a property
with a change signal.
One test case needed to be changed regarding the callback as the
publicProperty member now has a (permanent) observer and therefore
re-assigning the binding will re-evaluate it as the value might have
changed.
Change-Id: Ia7edcec432de830bdd4e07d943c5d4550c175ca4
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
When a class has multiple QProperty members to implement functionality,
it is common to have functions in the class that react to changes. For
example to emit a compatibility signal, in case of Qt Quick to mark the
scene graph as dirty, etc. etc.
To faciliate this use-case, this patch adds an internal
QPropertyMemberChangeHandler template that allows connecting a QProperty
field to a member function callback.
At the moment that callback is still 3 * sizeof(pointer). This could in
theory be reduced to 2 by eliminating the back-pointer (prev) as the
observer lives as long as the property. That however belongs into maybe
a future patch.
In order to get a pointer back to the surrounding object that holds the
QProperty as well as provides the callback function, the property system
was changed to pass through the address of the QProperty member at
run-time, and at compile time the delta from the QProperty member to the
beginning of the surrounding class is calculated. Through subtraction we
obtain the pointer to the owning object.
Change-Id: Ia2976357053f474ff44d0d6f60527c3b8e1f613a
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
std::function does not have deduction guides in older libc++ (presumably older
than version 10). Omitting the template parameter isn't essential for the test,
so just give it.
Change-Id: Ia9bb91f961b0928203737ec976913effd06433e0
Reviewed-by: Jüri Valdmann <juri.valdmann@qt.io>
Use QTRY_COMPARE in the flaky tests instead of waiting.
Change-Id: Ic18fc5fde3fa47f3b3ef21e6acd876bd6990981d
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
(cherry picked from commit 0ae6803d39)
All remaining pieces are gone, configuration included.
Relevant CMakeLists and configure.cmake were regenerated.
Fixes: QTBUG-76502
Change-Id: I667b5da7e3802830d236d50b5e9190c2ee9c19e2
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
The name of the option may cause confusion due to the fact
that it's not _fully_ anchoring the match, only anchoring it
at the offset passed to match() -- in other words, it's a
"left" anchoring. Deprecate the old name and introduce
a new one that should explain the situation better.
[ChangeLog][QtCore][QRegularExpression] The AnchoredMatchOption
match option has been deprecated in favor of
AnchorAtOffsetMatchOption, which should better describe
that the match is only anchored at the offset.
Change-Id: Ib751e5e488f2d0309a2da6496378247dfa4648de
Reviewed-by: Samuel Gaist <samuel.gaist@idiap.ch>
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@gmx.de>
Show and activate the widget, otherwise we can't rely on geometry
and gesture event delivery. Use QTRY_ macros in a few more places.
As a drive-by, fix coding style.
Change-Id: If3a13732ae6b07a137fec89e78b7e6b39e066bed
Fixes: QTBUG-82947
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>
DeleteLaterWidget is a main application window of the test. So, its
show() function should be called explicitly before starting the main
event loop. Otherwise, it remains hidden for the whole time, which
causes an incorrect emission of QApplication::lastWindowClosed signal
when a dialog window is closed in the middle of the test.
Also, fix synchronization between deferred deletion and timer event.
Change-Id: Id3ce5adbcd9e5e22508825c52025eeea70202354
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
In particular, this changed the US currency formats for negative
amounts to be parenthesised versions of the positive amount forms,
rather than having a minus sign after the $ sign. Test updated.
[ChangeLog][QtCore][QLocale] Currency formats are now based on CLDR's
accounting formats, where they were previously mostly based (more or
less by accident) on standard formats. In particular, this now means
negative currency formats are specified, where available, where they
(mostly) were not previously.
Task-number: QTBUG-79902
Change-Id: Ie0c07515ece8bd518a74a6956bf97ca85e9894eb
Reviewed-by: Cristian Maureira-Fredes <cristian.maureira-fredes@qt.io>
The tst_QSplitter::replaceWidget() is testing that if you
replace a longer QLabel with a shorter one in a horizontal
splitter layout, then we *only* get a resize for the new,
shorter label (expanding it horizontally to match the
replaced widget, as documented).
But the test accidentally triggered the QTextDocument backend
for the QLabel by including HTML tags in its text. Due to
QTBUG-82954, it is possible that the QTextDocument height
includes the leading of the font in the last line, so if
the default font has a leading, the new label will be higher
than the QSplitter, and the splitter will expand its height,
causing resizes for the other labels as well.
Since this is not the case we are testing here, and it is
currently blocking the fix for QTBUG-80554, we simply make
the new label use the same plain text backend as the others.
Task-number: QTBUG-82954
Change-Id: I6bfa1f3648b0fc9758c57ab2fa95be2451995df3
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
Added QFuture::onFailed() method, which allows attaching handlers for
exceptions that may occur in QFuture continuation chains.
Task-number: QTBUG-81588
Change-Id: Iadeee99e3a7573207f6ca9f650ff9f7b6faa2cf7
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Replaced the internal ExceptionHolder for storing QException* by
std::exception_ptr. This will allow to report and store exceptions
of types that are not derived from QException.
Task-number: QTBUG-81588
Change-Id: I96be919d8289448b3e608310e51a16cebc586301
Reviewed-by: Vitaly Fanaskov <vitaly.fanaskov@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
QRegExp is deprecated in Qt6 and will get moved to the Qt 5 compat
library. As such we need to remove all API and usages of QRegExp
in Qt.
Change-Id: I33fb56701d3d7c577f98a304c1d4e6f626fcb397
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>
We should not implicitly convert a QString to a QLocale object. It can
easily create unwanted side effects.
Change-Id: I7bd9b4a4e4512c0e60176ee4d241d172f00fdc32
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Quit the event loop once the object is destroyed.
Change-Id: I6df1cfe867daacb6af56eb84646be91d98a2f545
Reviewed-by: Alex Trotsenko <alex1973tr@gmail.com>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
The test can trigger timeouts in COIN, split into subtests.
Change-Id: I1fa5d52422275f89b2858d90c5979632aa7058e2
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
QFuture's original design pre-dates C++11 and its
introduction of move semantics. QFuture is documented
as requiring copy-constructible classes and uses copy
operations for results (which in Qt's universe in general
is relatively cheap, due to the use of COW/data sharing).
QFuture::result(), QFuture::results(), QFuture::resultAt()
return copies. Now that the year is 2020, it makes some
sense to add support for move semantics and, in particular,
move-only types, like std::unique_ptr (that cannot be
obtained from QFuture using result etc.). Taking a result
or results from a QFuture renders it invalid. This patch
adds QFuture<T>::takeResults(), takeResult() and isValid().
'Taking' functions are 'enabled_if' for non-void types only
to improve the compiler's diagnostic (which would otherwise
spit some semi-articulate diagnostic).
As a bonus a bug was found in the pre-existing code (after
initially copy and pasted into the new function) - the one
where we incorrectly report ready results in (rather obscure)
filter mode.
Fixes: QTBUG-81941
Fixes: QTBUG-83182
Change-Id: I8ccdfc50aa310a3a79eef2cdc55f5ea210f889c3
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Qt6 is binary incompatible with Qt5, no need to keep the old data.
Change-Id: I7fc4592a79ed0a8b79569926a31ef6deb5d3f983
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
When doing a shift-select while moving the mouse then the start point
should be based on the start of the current selection and not the
pressed position. If there is no current selection start index, then
we can safely depend on pressed position as this will be the previous
index pressed on.
This resolves an issue introduced by
e02293a76d when fixing QTBUG-78797
Fixes: QTBUG-81542
Change-Id: Ia66c42b220452fdcbc8cfccc05dbc8a3911c3f5e
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>
- Moves QUndo* classes (except QUndoView) from src/widgets/utils to src/gui/utils
- Moves related auto tests from widgets to gui
- Replaces QUndoAction with lambdas that do text prefixing
[ChangeLog][Undo Framework] QUndo* classes (except QUndoView) were moved from Qt
Widgets to Qt GUI.
Done-with: volker.hilsheimer@qt.io
Fixes: QTBUG-40040
Change-Id: I3bd8d4d32c64f8dee548f62159a1df2126da89d8
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
QShortcut has only one widget specific feature, which is whatsThis; that
is just a QString, so the setters and getters can just as well be in
QtGui.
The widgets specific implementation of shortcut matching and of showing
the whatsThis balloon stays in QtWidgets, in the private implementation.
Using virtual functions in the private we can override the empty default
in QtGui, and by adding a virtual factory function in QGuiApplication,
the correct private is instantiated depending on the kind of application
running.
Change-Id: I09ae4a5482f9fb70940c5e2bfe76d3d7fd710afc
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
Duplicating the number of classes is a high price to pay to be able to
have some QAction functionality behave differently, or be only available
in widgets applications.
Instead, declare the entire API in QtGui in QAction* classes, and
delegate the implementation of QtWidgets specific functionality to
the private. The creation of the private is then delegated to the
Q(Gui)ApplicationPrivate instance through a virtual factory function.
Change some public APIs that are primarily useful for specialized tools
such as Designer to operate on QObject* rather than QWidget*. APIs that
depend on QtWidgets types have been turned into inline template
functions, so that they are instantiated only at the caller side, where
we can expect the respective types to be fully defined. This way, we
only need to forward declare a few classes in the header, and don't
need to generate any additional code for e.g. language bindings.
Change-Id: Id0b27f9187652ec531a2e8b1b9837e82dc81625c
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
