Make it consistent with other assignments.
Change-Id: If6aeb1007436e3b6a035494116786c2ab2f079ca
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Useful for QtCreator, as a replacement for
Utils::isMainThread() inside threadutils.h,
may serve for other projects, too.
Introduce static QCoreApplicationPrivate::theMainThreadId
atomic helper field holding the id of the main thread.
Change-Id: Iccc0302f423f47b5ecad86c4cd3de4d1ee36155f
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
SetThreadDescription is a Win32 API provided by Kernel32.dll, the only
thing that MinGW is missing is the declaration of the function. We can
provide it ourselves.
Change-Id: Iad5fc6cb7b6eb190310f5888326b65f50ddbdca8
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
It's not really clear why this feature shouldn't work in release
builds of Qt. This aligns the behavior with UNIX.
Change-Id: I6a2f50640ab0b2e109e4c3ef7317954a3e8c79a2
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Starting with Windows 10 1607 there's a modern API to set a thread's
name on Windows (replacing the RaiseException hack).
Change-Id: I45b7abef7b082b9f239b2ac948bb79cce44cdb5e
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
A QT_MESSAGE_PATTERN including %{backtrace depth=4} should give
the call site of the QScopedScopeLevelCounter.
Task-number: QTBUG-120124
Change-Id: Ie477994882bde9168c931479102017ad5fde426a
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
All the other overloads are implemented using the new one.
Windows change relies on the pre-check in the code review making sure it
compiles.
[ChangeLog][QtCore][QThread] Added sleep(std::chrono::nanoseconds)
overload.
Task-number: QTBUG-110059
Change-Id: I9a4f4bf09041788ec9275093b6b8d0386521e286
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Applied Q_CONSTINIT to variables with static storage duration, but
skipped the POD types with core constant initializers.
Task-number: QTBUG-100486
Change-Id: Iaabf824e9cb0f29a405a149912200d4e4b3573c1
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
On finishing/terminating a thread, when processing posted events,
we need to consider QThread's own data instead of caller thread's data.
Otherwise we can get into unexpected situations such as double
destruction of an object, premature destruction, etc.
Fixes: QTBUG-103922
Pick-to: 6.4 6.3 6.3.1 6.2 5.15
Change-Id: Idf77221ebbaa0b150ee2d0c296b51829ae8dc30e
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Replace the current license disclaimer in files by
a SPDX-License-Identifier.
Files that have to be modified by hand are modified.
License files are organized under LICENSES directory.
Task-number: QTBUG-67283
Change-Id: Id880c92784c40f3bbde861c0d93f58151c18b9f1
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
Reviewed-by: Jörg Bornemann <joerg.bornemann@qt.io>
These semantics are deprecated and about to be changed.
Drive by, use nullptr instead of 0.
Change-Id: I213bf7d528d2fa312549f9fa49a5533198eddf88
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
This works around mismatch in threads starting and restarting QThreads,
and is safe since we don't need to establish a binding, and objectName
access in QThreadPool is locked behind a mutex.
Pick-to: 6.3 6.2
Fixes: QTBUG-96718
Change-Id: Id3f75e4f8344796ca658899645219fe3373ddd6d
Reviewed-by: Marc Mutz <marc.mutz@qt.io>
This is a data race, as the thread accesses QObject::objectName on the
QThread instance while the thread owning the QThread might modify the
objectName.
Instead, make a copy in the QThreadPrivate that can be accessed safely.
Task-number: QTBUG-96718
Pick-to: 6.3 6.2 5.15
Change-Id: I10701551d498993ca5055daf161636bfb648840c
Reviewed-by: Marc Mutz <marc.mutz@qt.io>
The Unix code stores an additional flag, ThreadPriorityResetFlag, in
the Policy enum, but ubsan does not approve:
qthread_unix.cpp:303:30: runtime error: load of value 2147483648, which is not a valid value for type 'Priority'
qthread_unix.cpp:304:75: runtime error: load of value 2147483648, which is not a valid value for type 'Priority'
Fix by making the variable of std::underlying_type_t<Priority>.
The masking and unmasking code can now be simplified, too.
In the Windows version, replace some switch targets with equivalent
ones to keep -Wswitch-like warnings, though I hasten to note that both
switches use a default case, so have anyway implicitly disabled said
warning.
Pick-to: 6.3 6.2 5.15
Change-Id: Ie4ea7d05e2928d2755ad12d36535197f85493191
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
...instead of during createEventDispatcher().
This way, startingUp() will be called [on the thread
being started] also for custom event dispatchers installed
with QThread::setEventDispatcher().
This prevents crashes when installing event dispatches which
expects that startingUp() will be called.
Crash reproducible with test case from QTBUG-51961.
Change-Id: I71bd696539689d928a61ff9b47d05297cf803b2f
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
This is required to remove the ; from the macro with Qt 6.
Task-number: QTBUG-82978
Change-Id: I3f0b6717956ca8fa486bed9817b89dfa19f5e0e1
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Omitting state machine and docs for now.
Task-number: QTBUG-84469
Change-Id: Ibfa5e7035515773461f6cdbff35299315ef65737
Reviewed-by: Sona Kurazyan <sona.kurazyan@qt.io>
Macros and the await helper function from qfunctions_winrt(_p).h are
needed in other Qt modules which use UWP APIs on desktop windows.
Task-number: QTBUG-84434
Change-Id: Ice09c11436ad151c17bdccd2c7defadd08c13925
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
InheritPriority may not be set, but the warning only occurs on Windows.
Move the warning to the public class.
Change-Id: I51d401300f840e4c1396c2c30182e49ed45d60d2
Reviewed-by: Cristian Maureira-Fredes <cristian.maureira-fredes@qt.io>
Reviewed-by: Christian Tismer <tismer@stackless.com>
Reviewed-by: David Faure <david.faure@kdab.com>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
So we are in sync with QWaitCondition::wait().
Task-number: QTBUG-64266
Change-Id: I1d7487786513241cedd35d202c4ddee4937b08ec
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
This is, depending on the implementation of pthread, significantly
cheaper than using a pthread library call.
Even if we don't know the assembler for an architecture, taking
the address of the thread_local variable is still faster.
As QThread::currentThreadId() is documented to be used internally
and not meant for application code, we don't have to care about
what exact value we return. Internally, we use it only to compare
thread IDs for equality, which this implementation is sufficient
for, even if a thread ID is re-used when one of the threads
terminate and a new thread starts (since the other thread is still
executing code). Besides, pthread_self documents [0] that a thread
ID may be reused, and that the returned pthread_t cannot be
portably compared using operator==(); using pthread_equal would
require adding a Qt thread-ID type that implements this correctly,
and would make things even slower.
[0] http://man7.org/linux/man-pages/man3/pthread_self.3.html
Change-Id: Id08e79b9b9c88976561f7cd36c66d43771fc4f24
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
If this function is called by multiple threads, more than one could
reach the mutex locking and call TlsAlloc(), but only the last one would
save the data. The others would be leaked and, worse, be used by those
other threads.
[ChangeLog][QtCore][QObject] Fixed a resource leak caused by a race
condition if multiple QObjects were created at the same time, for the
first time in an application, from multiple threads (implies threads not
started with QThread).
Fixes: QTBUG-77238
Change-Id: Ife213d861bb14c1787e1fffd15b63a5818bcc807
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
Semi-automated, just needed ~20 manual fixes:
$ find \( -iname \*.cpp -or -iname \*.h \) -exec perl -pe 's/(\.|->)load\(\)/$1loadRelaxed\(\)/g' -i \{\} +
$ find \( -iname \*.cpp -or -iname \*.h \) -exec perl -pe 's/(\.|->)store\(/$1storeRelaxed\(/g' -i \{\} +
It can be easily improved (e.g. for store check that there are no commas
after the opening parens). The most common offender is QLibrary::load,
and some code using std::atomic directly.
Change-Id: I07c38a3c8ed32c924ef4999e85c7e45cf48f0f6c
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
UWP also supports SwitchToThread. The usage of Sleep(0) was a leftover
that was forgotten when porting to desktop Window's approach of handling
threads.
Change-Id: I5e3d6fb3eefe07407b910cc6a6b45781d320e151
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
For winrt we cannot rely on the fact, that QThread::current will be called
from the correct thread for the first time. The application's main entry
point creates a suspended thread and starts it right afterwards. At that
moment, other functionality (QLoggingRegistry for example) might have
called QThread::current, which set the wrong thread as the main thread. In
order to avoid this situation, the main thread is explicitly set in
QCoreApplication's constructor.
Task-number: QTBUG-66418
Change-Id: I8b6347357a80eb395ae758bd3d420adef0826751
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
On Windows, the error code to be used with qErrnoWarning is not errno,
but Windows's GetLastError(). Obviously, right?
So don't pass errno to it, just let it get the error message straight
from qt_error_string(), which will use GetLastError().
Change-Id: I44e7d800c68141bdaae0fffd155619c93e3f3dab
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Replace by switch() where appropriate, remove else and unindent code
or simplify the return value.
Change-Id: Ie988b9068a9579ae5a899b3765e43aad480b564e
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Replace by reinterpret_cast or const_cast, respectively.
Use auto when initializing a variable to fix Clang warnings
about repeating the type name, do minor tidying along the way,
and a few conversions of 0 or NULL to nullptr.
Change-Id: Ieb271a87ddcf064f536e1ff05d23b1e688b1b56a
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Add it to configure.json and replace all occurrences of QT_NO_THREAD
with QT_CONFIG(thread). Add conditions for other features that depend
on thread support. Remove conditions where we can use the QMutex and
QThreadStorage stubs.
Change-Id: I284e5d794fda9a4c6f4a1ab29e55aa686272a0eb
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@qt.io>
In some places we call startingUp(), in others we don't. It's probably
ok for those that have just created an object of a given class, which
knows whether the virtual call is necessary or not. But for the generic
case, we do call it.
Change-Id: If48c5c2e920c433298f1fffd153ee1cc75703204
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
sleep, msleep, and usleep are not actually related to threading and
serve a purpose also in a single threaded application.
Change-Id: Iba2e343d48a9c09e60125bc1b589047e0241608a
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
Leaving the logic of starting up the event dispatcher to the call site,
unified both the case of a custom event dispatcher and the default
event dispatcher.
The data argument is left in due to the static nature of the function.
Change-Id: Ia2020e39ccc67cd5a583d4e614dd978b2ec44dba
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
In preparation of Qt6 move away from pre-C++11 macros.
Change-Id: I44126693c20c18eca5620caab4f7e746218e0ce3
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Align ourselves to the Standard Library and call std::terminate if an
exception leaves the thread entry point (that is, run()).
On platforms using pthreads, thread cancellation needs to be taken in
special consideration, since it looks like it was supported before.
On Glibc, and when using C++, pthread_cancel and pthread_exit are
implemented by throwing a special kind of exception that can be caught,
but must always be rethrown. That exception is then used to activate the
cancellation clean-up handlers. (This is non-Standard C++ behavior.)
So: mimic what libstdc++'s std::thread does to support Glibc's pthread
cancellation.
At this time, it looks like libc++ has no support for this, and when
used in combination with Glibc a thread cancellation results in a crash
(also because it does not seem to terminate() when exceptions leave the
thread).
[ChangeLog][QtCore][QThread] An exception escaping from QThread::run()
will now result in immediate and abnormal program termination. The same
applies if an exception leaves a slot connected directly to the
QThread::started() or QThread::finished() signals.
Change-Id: I73cc93cf06c57018e149a578cc9d4cd0d6fc00ef
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Solves a data race found by TSan.
Since thread and threadId are QAtomicPointer, I've removed the explicit
initialization in the QThreadData constructor
Task-number: QTBUG-58855
Change-Id: I4139d5f93dcb4b429ae9fffd14a34082f2683f76
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
This commit also reverts fecaa6aae8.
The Microsoft documentation says _beginthreadex and _endthreadex are
used to initialize the C/C++ runtime and are necessary when linking to
libcmt(d).lib (that is, when using the -MT or -MTd options). For regular
builds linking against the .dll runtime, there should be no impact.
Inspection of the CRT source code which gets installed with Visual
Studio or Windows SDK proves that.
It's preferable to use CreateThread directly as _endthreadex will try to
call FreeLibraryAndExitThread, which can cause a deadlock if we try to
wait for the thread to exit from a global destructor.
For -MT builds, since there can be no DLLs, it's not a problem to
continue to use _beginthreadex and follow Microsoft's recommendation.
Task-number: QTBUG-53031
Change-Id: Id5480807d25e49e78b79ffff144af62c3c59dfe0
Reviewed-by: Maurice Kalinowski <maurice.kalinowski@qt.io>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
This change partially reverts 1bfc7f68 about QT_HAS_BUILTIN define
and undef in src/corelib/tools/qsimd_p.h.
This change is also squashed with "Fall back to c++11 standard
compiler flag for host builds" which is done by Peter Seiderer.
Conflicts:
mkspecs/features/default_post.prf
src/3rdparty/sqlite/0001-Fixing-the-SQLite3-build-for-WEC2013-again.patch
src/3rdparty/sqlite/sqlite3.c
src/corelib/tools/qsimd_p.h
src/gui/kernel/qevent.cpp
src/gui/kernel/qwindowsysteminterface.cpp
src/gui/kernel/qwindowsysteminterface_p.h
src/plugins/bearer/blackberry/blackberry.pro
src/plugins/platforms/cocoa/qcocoasystemsettings.mm
src/plugins/platformthemes/gtk2/gtk2.pro
src/plugins/styles/bb10style/bb10style.pro
src/sql/drivers/sqlite2/qsql_sqlite2.cpp
tools/configure/configureapp.cpp
Task-number: QTBUG-51644
Done-with: Peter Seiderer <ps.report@gmx.net>
Change-Id: I6100d6ace31b2e8d41a95f0b5d5ebf8f1fd88b44
Define WINVER, _WIN32_WINNT as 0x501 (Windows XP) in qt_windows.h.
Remove definitions of the same/lower versions and unneeded
definitions in other places. Remove definition for Borland compiler.
Task-number: QTBUG-51673
Change-Id: I2a344a7f7cf78b2afbf45dcdf8bf2a19b93f0a07
Reviewed-by: Joerg Bornemann <joerg.bornemann@theqtcompany.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
From Qt 5.7 -> LGPL v2.1 isn't an option anymore, see
http://blog.qt.io/blog/2016/01/13/new-agreement-with-the-kde-free-qt-foundation/
Updated license headers to use new LGPL header instead of LGPL21 one
(in those files which will be under LGPL v3)
Change-Id: I046ec3e47b1876cd7b4b0353a576b352e3a946d9
Reviewed-by: Lars Knoll <lars.knoll@theqtcompany.com>
According to MSDN Tls* is inline replaced by Fls* on Windows (Phone) 8.1
and beyond.
However, this does not seem to be the case for Windows 10. An
application links against Tls* and the certification step fails due to
using non-allowed APIs.
Hence we do the inline replacement manually. QThreadStorage and QThread
tests continue to work, so it seems to be an oversight by Microsoft.
Task-number: QTBUG-50292
Change-Id: Ice1b6e54fcee238c94af5c6fb1753d903db7476d
Reviewed-by: Oliver Wolff <oliver.wolff@theqtcompany.com>
* theMainThread is written by the main thread and read by
QThreadData::~QThreadData() (any managed thread)
* QThreadData::thread is written by QThread::~QThread (in the parent thread)
and read+written by QThreadData::~QThreadData (in the managed thread).
This can happen because QThreadData is refcounted so the managed
thread (which derefs it) races with the parent thread (which sets it to 0).
Change-Id: I72de793716391a0937254cda6b4328fcad5060c7
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
The dependent macro Q_OS_WINRT is not yet in scope when PCH is disabled,
and it was missing parentheses anyway. Use WINAPI_FAMILY here instead, as
it's just as good.
Change-Id: Ib33904a9173f4f262c57ba1c27b37019f12827e7
Reviewed-by: Oliver Wolff <oliver.wolff@theqtcompany.com>
Jarek Kobus
Giuseppe D'Angelo
Tor Arne Vestbø
Ahmad Samir
Sona Kurazyan
Vladimir Belyavsky
Lucie Gérard
Allan Sandfeld Jensen
Volker Hilsheimer
Marc Mutz
Morten Johan Sørvig
Lars Schmertmann
Oliver Wolff
Qt Forward Merge Bot
Friedemann Kleint
Christian Ehrlicher
Liang Qi
Thiago Macieira
Ulf Hermann
Friedemann Kleint
Liang Qi
Jani Heikkinen
Maurice Kalinowski
David Faure
Andrew Knight