Support this both for parameters and return types, in all template
functions for calling methods or accessing fields.
To manage the life-time of the temporary objects, create a local stack
frame in the JVM around the calling function. Popping that implicilty
releases all local refernces, so that we don't have to worry about
doing so explicilty. Adding a local reference to the temporary jstring
objects is then enough for the object to live as long as it's needed.
The LocalFrame RAII-like type needs a QJniEnvironment to push and pop
the frame in the JVM, so we don't need a local QJniEnvironment anymore.
Reduce code duplication a bit as a drive-by, and add test coverage.
Change-Id: I801a1b006eea5af02f57d8bb7cca089508dadd1d
Reviewed-by: Tinja Paavoseppä <tinja.paavoseppa@qt.io>
Add compile-time testing to make sure that we can declare a JNI
class String that maps to java/lang/String.
Change-Id: I2b68b2b46112e56b279f3fcddc3d71847a005924
Reviewed-by: Petri Virkkunen <petri.virkkunen@qt.io>
Reviewed-by: Zoltan Gera <zoltan.gera@qt.io>
Reviewed-by: Tinja Paavoseppä <tinja.paavoseppa@qt.io>
d026fad3d9 added converting constructors
for QPointer. This however made converting _assignments_ ambiguous,
introducing a regression for users coming from Qt < 6.6.
This code:
QPointer<Base> base;
QPointer<Derived> derived;
base = derived;
used to convert `derived` to `Derived *` (using the implicit conversion
operator from `QPointer<Derived>` to `Derived *`), and then the
assignment operator for `QPointer<Base>` that took a `Base *`.
The introduction of the conversion constructor in 6.6 makes it possible
to convert `QPointer<Derived>` to `QPointer<Base>`, and then fall back
to the compiler-generated assignment operator for `QPointer<Base>`.
The result is that the code above is now ambiguous and stops compiling.
Fix this by adding a converting assignment operator for QPointer.
I'm only adding the const-lvalue overload because the implementation
requires going through the private QWeakPointer::assign helper. We
cannot copy-assign or move-assign the inner QWeakPointer, as those
assignments require lock()ing the QWeakPointer and that's not possible
on a QObject-tracking QWeakPointer (but cf. QTBUG-117483).
Assigning from a rvalue QPointer would mean calling assign() on
the internal QWeakPointer _and_ clear the incoming QPointer,
and that's strictly worse than the lvalue overload (where we just call
assign()).
Change-Id: I33fb2a22b3d5110284d78e3d7c6cc79a5b73b67b
Pick-to: 6.6 6.6.0
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Android APIs use integer constants like enum values, so they are mapped
to one of the integeral types (jint, jshort, jlong etc) on the C++ side.
Enable C++ code to declare an equivalent enum (scoped or unscoped), and
to use that enum as a type in JNI calls by treating it as the underlying
type in the signature() generator.
Add a helper type trait that maps enums to their underlying type and
other integral types to themselves (we can't use std::underlying_type_t
on a non-enum type). Add tests.
Note: Java Enums are special classes with fields; this change does not
add any special support for those.
Change-Id: Iec430a1553152dcf7a24209aaebbeceb1c6e38a8
Reviewed-by: Petri Virkkunen <petri.virkkunen@qt.io>
Reviewed-by: Zoltan Gera <zoltan.gera@qt.io>
Reviewed-by: Juha Vuolle <juha.vuolle@qt.io>
Equivalent to get/setStaticField.
Add a test, and tighten up the surrounding test code a bit.
Change-Id: Ic0993c5d6223f4de271cb01baf727459b5167f94
Reviewed-by: Tinja Paavoseppä <tinja.paavoseppa@qt.io>
Reviewed-by: Petri Virkkunen <petri.virkkunen@qt.io>
Reviewed-by: Zoltan Gera <zoltan.gera@qt.io>
Template functions don't permit partial specialization, e.g. we cannot
specialize typeSignature() to return an array signature for any
std::vector or QList type. We need to do that for better array support,
so move those functions as static members into a template class, which
then can be specialized.
Since submodules are both calling and specializing typeSignature and
className as template functions, keep and use those until the porting is
complete.
Change-Id: I74ec957fc41f78046cd9d0f803d8cc9d1e56672b
Reviewed-by: Petri Virkkunen <petri.virkkunen@qt.io>
Reviewed-by: Zoltan Gera <zoltan.gera@qt.io>
Reviewed-by: Tinja Paavoseppä <tinja.paavoseppa@qt.io>
The type lives in the QtJniTypes namespace, which is where types end up
that are declared through the Q_DECLARE_JNI_CLASS/TYPE macros. Having a
String type in that namespace prevents us from declaring the Java String
class as a QtJniTypes type, which is silly.
Perhaps this type becomes obsolete at some point with std::string being
a constexpr type in C++23, but until then we need it. It has no ABI, so
renaming it us safe.
Until submodules are ported, leave a compatibility alias String type,
which also prevents us from declaring a String JNI class in tests until
the alias is removed in a later commit.
Change-Id: I489a40a9b9e94e6495cf54548238438e9220d5c1
Reviewed-by: Zoltan Gera <zoltan.gera@qt.io>
Reviewed-by: Tinja Paavoseppä <tinja.paavoseppa@qt.io>
Reviewed-by: Petri Virkkunen <petri.virkkunen@qt.io>
The QVariant(QMetaType) constructor is a major anti-pattern: unlike
*every* other QVariant's constructor, it doesn't build a QVariant
holding the QMetaType object, but a QVariant of the specified type.
Introduce a named constructor for this use case instead.
In principle, this should lead to a deprecation of the QMetaType
constructor... except that it's used everywhere, so I can't do it at
this time.
Drive-by, improve the documentation of the QVariant(QMetaType)
constructor (since it's basically c&p for the new fromMetaType
function).
[ChangeLog][QtCore][QVariant] Added the QVariant::fromMetaType named
constructor, that builds a QVariant of a given QMetaType.
Change-Id: I4a499526bd0fe98eed0c1a3e91bcfc21efa9e352
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
That we have two macros to declare a C++ type to represent a Java class
is confusing. The TYPE macro as of now allows us to declare array types,
but with QJniArray we won't need that anymore, and can just use Class[]
as the type instead. Changing that will be a follow-up commit; for now,
get rid of TYPE-usages to declare regular classes.
Change-Id: Iea0a9548772ca701148442412cf6ad567583213f
Reviewed-by: Zoltan Gera <zoltan.gera@qt.io>
Reviewed-by: Petri Virkkunen <petri.virkkunen@qt.io>
Reviewed-by: Assam Boudjelthia <assam.boudjelthia@qt.io>
The bindable property tests were not using the QTestPrivate helpers, so
add a new test which uses them.
The new tests revealed a binding loop for the interval property.
Fix it in a usual way by explicitly removing the binding and using
{set}ValueBypassingBindings() in the setter.
Task-number: QTBUG-116346
Pick-to: 6.6 6.5
Change-Id: If94f57938da449a68e3527aead5ebd55ba410adb
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>
The 6.5 versions of the overload not taking a context/receiver object
were constrained by requiring a functor to be free function or lambda.
207aae5560 removed that constraint, which
might be source incomaptible if wrapper functions in user code forward
the constraint using Expression SFINAE. Those wrappers would no longer
be removed from the overload set based on the same criteria as the
function they wrap.
We can't constrain the new functions based on the same predicate as
before, as after the simplification we have only one overload with, and
one without context object. But we can still remove overloads for
incompatible functors.
Add the respective scenario to the QPermission test as a compile-time
test.
Found during 6.6 header review.
Pick-to: 6.6
Change-Id: Id21391b4a6b78a29de2f8fa04374f4262e5fafa7
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
...to set m_o to nullptr and prevent an existing QSignalBlocker from
touching the QObject, which it was created for.
Add documentation and implement an autotest.
Change-Id: Ic18e80af5a57df1928f9d36aa0ab7ad79b6525fd
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
QWidget already handles this, but it might be useful for non-Widget
object hierarchies as well, such as in Qt Quick.
The flag is opt in, and as QWidget already handles these events by
itself (without checking any flags), we assert that we don't end up
in this code path, instead of enabling it for QWidget. The latter
would mean refactoring the QWidget code, with possible regressions.
Docs and header comments have been updated to reflect that this
event is not widget specific. (This is an issue with other events
as well, that are documented to say "widget", since they came
from a time when there was only QWidget, but nowadays apply to
e.g. QWindow as well. That's something for another fix though).
Change-Id: Ib71962131d6011c17dcce8c01bd8adcdaa58d798
Reviewed-by: Axel Spoerl <axel.spoerl@qt.io>
Due to the pre-existing overload of invokeMethod that accepts a void-pointer there is
concern that the new overloads would not be preferred.
Here we add a test for this to verify all supported platforms work.
Change-Id: Ie5ac7bf16643599006ac57e0145feb6aace3fa87
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
This was missing for a while, and there is nothing fundamentally
missing for it to work.
With the more recent work around slot objects and invokeMethod in
general, it is a good time to add support for this.
In this patch, when connecting to a functor, it automatically deduces
the overload to call based on the arguments passed to invokeMethod.
Sharing code with QObject::connect could be done, but they have a
key difference that makes it harder:
With signal emissions we throw away trailing arguments that are not
used: i.e. `signal(int, int)` can be connected to `slot(int)` or
`slot()`. With invokeMethod that's not a thing. So we will need a way
to toggle that behavior during resolution.
[ChangeLog][QtCore][QMetaObject] Added support for passing parameters
to the overload of QMetaObject::invokeMethod that takes a functor. These
new overloads must have the return-value passed through qReturnArg().
Change-Id: If4fcbb75515b19e72fab80115c109efa37e6626e
Reviewed-by: Ievgenii Meshcheriakov <ievgenii.meshcheriakov@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
The was introduced with the rewrite of QMetaObject::invokeMethod() in
commit 0f76e55bc4, because we have an
optimization for zero timers to avoid creating a temporary
QSingleShotTimer object. The old implementation did attempt to normalize
the target slot name, but did so because it looked metamethods up using
QMetaObject::indexOfMethod:
int idx = meta->indexOfMethod(sig.constData());
if (idx < 0) {
QByteArray norm =
QMetaObject::normalizedSignature(sig.constData());
idx = meta->indexOfMethod(norm.constData());
}
The new implementation does not use this method so it didn't need to
attempt to normalize.
I am fixing this only in QTimer and not in QMetaObject::invokeMethodImpl
(even though it is trivial to do so) because I don't believe spaces in a
pure string to invokeMethod were ever expected to work:
QMetaObject::invokeMethod(obj, "slotName ", Qt::QueuedConnection);
The Q_ARG and Q_RETURN_ARG (for code not recompiled) still does
normalization inside QMetaType::fromName().
Fixes: QTBUG-116060
Pick-to: 6.5 6.6
Change-Id: I964c2b1e6b834feb9710fffd177cac60c83ef413
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
Unix dispatcher is not used and - as such - redundant on WASM.
Change-Id: Ia8789ef783b06ce9cfba2ce9d67159db2355b594
Reviewed-by: Mikołaj Boc <Mikolaj.Boc@qt.io>
Observers should only be registered when _reading_ the property.
Otherwise we get binding loops.
Pick-to: 6.6 6.5
Change-Id: I974f6ea444fa7a5d333ed79eea6f34e3d757d169
Reviewed-by: Ivan Solovev <ivan.solovev@qt.io>
The loop was iterating over a temporary container, so it couldn't have
changed it. Store the container in a const auto variable and use
ranged-for.
In files where Q_FOREACH isn't used any more, remove
"#undef QT_NO_FOREACH".
Task-number: QTBUG-115839
Change-Id: I402df5fa48f4287f3cc989ddae1524da43999049
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
The density of Q_FOREACH uses in this and some other modules is still
extremely high, too high for anyone to tackle in a short amount of
time. Even if they're not concentrated in just a few TUs, we need to
make progress on a global QT_NO_FOREACH default, so grab the nettle
and stick to our strategy:
Mark the whole of Qt with QT_NO_FOREACH, to prevent new uses from
creeping in, and whitelist the affected TUs by #undef'ing
QT_NO_FOREACH locally, at the top of each file. For TUs that are part
of a larger executable, this requires these files to be compiled
separately, so add them to NO_PCH_SOURCES (which implies
NO_UNITY_BUILD_SOURCES, too).
In tst_qglobal.cpp and tst_qcollections.cpp change the comment on the
#undef QT_NO_FOREACH to indicate that these actually test the macro.
Task-number: QTBUG-115839
Change-Id: Iecc444eb7d43d7e4d037f6e155abe0e14a00a5d6
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
It has always returned dash-joined forms of the locale names, and
callers who need an underscore-joined form have been obliged to
replace('-', '_') before using them. Given that everything it adds to
the list comes from QLocaleId methods that accept a separator, it's
trivial to let it offer the same choice to its callers and save them
this hassle.
Amended code in QTranslater and QMimeType to save them that hassle.
[ChangeLog][CoreLib][QLocale] QLocale::uiLanguages() now lets the
caller choose what separator to use between the tags that make up each
locale-identifier in the list returned.
Change-Id: I91fcd0b988d9a64e0e9ad9e851f6cb8c1be8ae50
Reviewed-by: Marc Mutz <marc.mutz@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Everyone must have this by now. This test was 1193 ms of CMake time.
Since this was a PUBLIC feature, I've left it around with a constant
condition.
Change-Id: Ifbf974a4d10745b099b1fffd177754538bbff245
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
Commit ca54b741d6 used the internal
has_operator_equal (and commit 01d94760d8
copied that for has_operator_less_than) instead of using the recursive
expander that was being used here. That assumed that the contained type
in std::optional would always be the last final check, which is an
incorrect assumption.
Fixes: QTBUG-115646
Pick-to: 6.6 6.5
Change-Id: Ifbf974a4d10745b099b1fffd177702934bec27ff
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
There is no QT_CONFIG_thread.
Thanks to Alexey Edelev for spotting why I couldn't run the test.
Pick-to: 6.6 6.5
Change-Id: I11c99d9b1ff8fed67b118028b76fba8ee6db3c42
Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>
The test was relying on the fact that, having written 1 byte to both
writeEnd1 and writeEnd2 (and ensured those bytes were written with
waitForBytesWritten()), both read ends would be activated by the next
event loop. It turns out that this was an unreliable assumption, because
the processing of that 1 byte on the second socket may not have happened
yet. So firm up by waiting that both read ends are readable before even
creating the QSocketNotifiers we will read on.
I'm not entirely sure what this test is attempting to test. Its
documentation says it's testing a QAbstractSocket condition, but the
read ends aren't QAbstractSocket (this test should have been in
tst_QAbstractSocket if so). It may be testing the condition that caused
that QAbstractSocket behavior, but that wouldn't be a good test.
Drive-by remove redundant flush()-after-waitForBytesWritten() calls.
Fixes: QTBUG-115154
Pick-to: 6.5 6.6
Change-Id: I61b74deaf2514644a24efffd17708f8071f707ed
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
The test hasn't failed on Windows for a long time, but regularly fails
on macOS in CI, so replace the entry accordingly.
Task-number: QTBUG-115154
Pick-to: 6.6
Change-Id: Ib89d15cb9edafad5dd71f6e3f830d03aaeb16331
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Add the boilerplate standalone test prelude to each test, so that they
can be opened with an IDE without the qt-cmake-standalone-test script,
but directly with qt-cmake or cmake.
Boilerplate was added using the following scripts:
https://git.qt.io/alcroito/cmake_refactor
Manual adjustments were made where the code was inserted in the wrong
location.
Task-number: QTBUG-93020
Change-Id: I28b6d3815c5f43d2c33ea65764f6f3f8f129eaf3
Reviewed-by: Amir Masoud Abdol <amir.abdol@qt.io>
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
`QVariant::convert` may lead to crash or produce garbage data when
attempting to convert a gadget between a pointer type and a value type,
for example from a variant holding a QLocale gadget to a QLocale*
pointer and vice versa. Similarly, `QVariant::view` may crash under the
same conditions.
The reason is that conversion is implemented through copy construction
assuming that both source and target types are either both pointers or
both values. If converting from pointer to value type, the result is
crash during destruction of the QVariant. If converting from value to
pointer type, the result is a QVariant holding a pointer to garbage
data (and possibly crash if pointer is dereferenced).
Similarly, if attempting to convert a pointer to a QObject derived type
to its value type, the system crashes, with a slightly different failure
mode. During `QVariant::convert`, a temporary `QVariant` of the target
type is created. Since objects that can not be copy constructed are
invalid for `QVariant`, the temporary is left empty without constructing
the target value. Then, when attempting to convert from a pointer type
to a value type, the temporary's destructor is incorrectly called on the
owned object. Since the owned object is never constructed, this leads to
a crash.
The proposed fix is to return false from `QMetaType::view`,
`QMetaType::canView`, `QMetaType::convert`, and `QMetaType::canConvert`
if the target type is of different 'pointedness' than the source type.
After this fix, converting and viewing gadgets and QObjects behaves the
same way as primitive types and core types, which already returned false
when converting between value type and pointer type.
Fixes: QTBUG-114797
Pick-to: 6.5 6.6
Change-Id: If5ad764a60f2f3c912070198073b28999d995f17
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Under some circumstances, MSVC seems to complain about SlotArgumentCount
being unused
qobject.h(210): warning C4189: 'SlotArgumentCount': local variable is
initialized but not referenced
note: see reference to function template instantiation
'QMetaObject::Connection QObject::connect<void(__cdecl QAction::* )(bool),
main::<lambda_1>>(const QAction *,Func1,
const QtPrivate::ContextTypeForFunctor<main::<lambda_1>,void>::ContextType *,
Func2 &&,Qt::ConnectionType)' being compiled
This is nonsense, as SlotArgumentCount is used in the next line, to
construct the list of signal arguments, but the workaround to declare
the variable as [[maybe_unused]] is trivial.
Add a connect statement to the test case that creates such a connection.
This does not produce any warning with or without the attribute (and if
it did, the build would fail for CI configuratinos setting -Werror).
Pick-to: 6.6
Fixes: QTBUG-114781
Change-Id: I4ee6f7d57c2836ef3dd9741d037d48181af2cdec
Reviewed-by: Marc Mutz <marc.mutz@qt.io>
This is in line with how QMetaType handles QMetaTypeInterface*. You can
retrieve a const pointer to it.
Pick-to: 6.6
Task-number: QTBUG-113690
Change-Id: Iaf3c10603dc6049a5553987c90006807867abc0d
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
QObjectPrivate::getPropertyAdaptorSlotObject called
connectionsForSignal.
Calling this function is only safe after it has been ensured beforehand that the vector has size > signalIndex. As getPropertyAdaptorSlotObject
is not supposed to modify the vector, it does not resize the vector and it could consequently end up with an out-of-bounds read.
To avoid that issue, we instead first check if the vector can
potentially contain an entry for the signal. If not, we simply return
nullptr, and avoid the call to connectionsForSignal.
The issue and its fix can be verified by running the modified
tst_qproperty test with ASAN enabled. The test is modified in the
following way:
- We first create a signal connection to a dummy slot. Otherwise,
connections.loadRelaxed() would return a nullptr, and the problematic
code would never be reached.
- We add enough signals to ensure that the fooChanged signal will
actually be out of reach (which means >= 8 signals, as the initial
capacity of the vector is 8)
Running the test without ASAN will most likely not result in a failure,
as then the out-of-bounds read will simply read garbage, and the most
likely result is that the cast below will fail.
Pick-to: 6.6 6.5
Change-Id: I18a3c4f52769c2b6491a685abb84f6fcfb44e4d8
Reviewed-by: Ivan Solovev <ivan.solovev@qt.io>
If we have a rvalue reference to an unshared QVariant, we can avoid
potentially expensive copies, and use move semantics instead.
[ChangeLog][QtCore][QVariant] Added rvalue QVariant overloads of qvariant_cast<T>() and QVariant::value<T>().
[ChangeLog][Potentially Source-Incompatible Changes][QVariant] It is no
longer possible to take the address of a specialization of
qvariant_cast; consider using a lambda function instead.
Change-Id: Ifc74991eadcc31387b755c45484224a3200bb0ba
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
QDeferredDeleteEvent has the loopLevel field, which is a sum of
scope and loop levels found at posting. In sendPostedEvents however,
it is impossible to only use this information to find delete events
posted before the outermost loop (which should be handled by any loop)
based solely on this information, as the scope level essentialy removes
the information on loop level.
Break the loopLevel in two, storing both loop and scope levels in
QDeferredDeleteEvent, so that we can check whether an event was posted
before the outermost event loop (for which we need to compare only the
loop level).
QDeferredDeleteEvent was also made private as it should - it is an
implementation detail that wasn't hidden properly.
Change-Id: I0a607a0bd3a2deb5024acad67f740dbf4338574c
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
Reviewed-by: Mikołaj Boc <Mikolaj.Boc@qt.io>
Extract Method fromStdVariantImpl() to share the otherwise
more-or-less identical implementation between the two overloads.
Don't use a constrained template version of fromStdVariantImpl() as
fromStdVariant(), because the constraint would have to be very complex
to continue allowing subclasses of std::variant to be passed.
As a drive-by, mark the valueless_by_exception() path Q_UNLIKELY.
[ChangeLog][QtCore][QVariant] Added overload of fromStdVariant()
taking rvalue std::variant<>s.
Fixes: QTBUG-114134
Change-Id: Ia1c7ae93ab421e6689dc9f2d8d0c2295b23cbbf6
Reviewed-by: Giuseppe D'Angelo <giuseppe.dangelo@kdab.com>
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
When passing an rvalue-reference to QVariant, there is no reason to make
a copy if the type is moveable. Moreover, we know that the pointer which
we construct from the object passed to fromValue non-null. We make use
of both facts by parametrizing custom_construct on
non-nullness and availability of a move-ctor, and then dispatching to
the suitable template.
We need to keep the const T& overload, as otherwise code which
explicitly specializes fromValue and passes a const lvalue to it would
stop to compile.
[ChangeLog][QtCore][QVariant] Added fromValue() overload taking rvalues.
Change-Id: I44fb757d516ef364fe7967bc103b3f98278b4919
Reviewed-by: Marc Mutz <marc.mutz@qt.io>
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
[ChangeLog][QtCore][QVariant] Implemented in-place construction for
QVariant. The constructor taking std::in_place_type<Type> constructs
an object of type Type directly inside QVariant's storage, without any
further copy or move operations. QVariant::emplace() does the same
when replacing the content of an existing QVariant and tries to reuse
previously-allocated memory.
Fixes: QTBUG-112187
Change-Id: I16614ad701fa3bb583976ed2001bb312f119a51f
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
Reviewed-by: Ivan Solovev <ivan.solovev@qt.io>
It's not needed, but makes the point for having a mutable lambda in the
first place.
Change-Id: I483862d6aee90bb62d4b5363c56a80bb05e14df7
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
This places the first through third parameters on the exact positions
that they will be used to perform the operations in the switch, saving
the compiler from generating a few instructions to move data around. All
ABIs Qt supports that pass any function parameters in registers at all
pass at least 4.
We keep the return type as void (instead of returning bool, for the
Compare case) so the compiler can apply tail-call optimizations for
those two typical cases.
PMF case: https://gcc.godbolt.org/z/9oP5boKfj
Function case: https://gcc.godbolt.org/z/e9vEzd5dj
Functor case: https://gcc.godbolt.org/z/s8Ejjra7P
Change-Id: I3e3bfef633af4130a03afffd175d3e3009c56323
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
Amends 3bf5b5f894, after which free
functions and std::bind could no longer be used as callables in
QMetaMethod::invokeMethod.
For free functions to work we need to decay to function pointers when
choosing what type QtPrivate::Callable aliases.
And std::bind has operator() overloads and the return type cannot be
deduced. So simplify the definition of the ZeroArgFunctor - we know
the function prototype if we know the return type.
Add testcase for calling std::bind and free function, and remove the
now unneeded helpers for functor argument and return type deduction.
Change-Id: I54aac5cb6d660267e6b2f5ab05d583e8826cdf9a
Reviewed-by: Zoltan Gera <zoltan.gera@qt.io>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
The QWeakPointer conversion SMFs cannot actually be used for QObject
payloads, as, for unknown reasons (some comment about vtable this
author doesn't understand), conversion goes through QSharedPointer,
the creation of which throws the checkQObjectShared() warning and
yields a nullptr.
We need to continue to use the QWeakPointer(T*, bool) constructor the
QPointer(T*) ctor also uses.
It's high time we dissociated QPointer from QWeakPointer...
Amends 5f28d367d9.
Fixes: QTBUG-112464
Change-Id: I2f93843af3daf02323d77a4259eaa3745d8de3a8
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
We have quite a few Qt API that assumes this, so making this change
helps transitioning them to QDeadlineTimer.
[ChangeLog][Important Behavior Changes] QDeadlineTimer will now
interpret negative millisecond remaining times as "forever", instead of
only the value -1. This brings the API closer in line with other API
like QMutex. This change does not apply to the nanosecond counts in the
API, nor to the API based on std::chrono.
Change-Id: I6f518d59e63249ddbf43fffd175a3e5bead564ae
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Commit b498e1ae3a removed the last
distinction. And since there was no distinction, the code that was
previously under a conditional for CoarseTimer must work for precise
too.
Change-Id: I6f518d59e63249ddbf43fffd175a3eddbd41611a
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
After the recent changes we only have a single implementation of
QSlotObjectBase, which can handle free functions, member functions,
functors, and lambdas. Rename it to callable, and explicitly hide
the static implementation function so that it doesn't become a symbol
of static libraries using Qt.
Also rename makeSlotObject to makeCallableObject, and polish coding
style and comments in the qobjectdefs_impl header a bit.
Change-Id: Id19107cedfe9c624f807cd8089beb80e9eb99f50
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
[ChangeLog][QtCore][QDebug] Added pretty formatting of C++ <chrono>
durations.
[ChangeLog][QtTest] Added pretty formatting of C++ <chrono> durations
for QCOMPARE expressions.
Change-Id: I3b169860d8bd41e9be6bfffd1757cc087ba957fa
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
Add helper that allows us to determine the argument list and return type
of a functor. This triggers a compile time error if the functor has
operator()() overloads (we only support zero-argument call operators, but
there might be const/noexcept variations). Use that helper to declare a
ZeroArgFunctor type which also declares a ReturnType and Arguments alias.
Add a Callable alias that now combines FunctionPointer and ZeroArgFunctor
into a single type that we can then use to merge the specializations of
QMetaObject::invokeMethod.
[ChangeLog][Potentially source-incompatible changes] Using a functor
with several operator() overloads in QMetaObject::invokeMethod now causes
a compile time error. Qt would previously ignore const and noexcept
overloads and always call the mutable version on a copy of the functor.
Change-Id: I3eb62c1128014b729575540deab615469290daeb
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
