| Commit message (Collapse) | Author | Age | Files | Lines |
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QThreadPool is a QObject and must be deleted if the QCoreApplication
is being destroyed to release the underlying ThreadData.
A Q_GLOBAL_STATIC won't release any memory is not able to
manually release it.
Pick-to: 5.15
Task-number: QTBUG-84234
Change-Id: Ia82bcff2b564b753ed687f025ff86fa1bed1e64c
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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Deprecated in 5.9
Change-Id: Ib6e2a5da1e7ee2664fb6fa496bdc880fab870901
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
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This can lead to a deadlock if we block all the worker threads, waiting
for the worker threads to finish.
Pick-to: 5.15
Fixes: QTBUG-84619
Change-Id: I92b7f96007897d86ece0c34223bab0df4ccbed9a
Reviewed-by: Sona Kurazyan <sona.kurazyan@qt.io>
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The reference counter could only ever be -1, 0 or 1,
as an autoDeleted QRunnable can only be in a single
thread pool.
This commits keeps the reference counting for now,
but asserts sanity, simplifies locking and fixes a
leak.
Pick-To: 5.15
Fixes: QTBUG-20251
Fixes: QTBUG-65486
Change-Id: I4de44e9a4e3710225971d1eab8f2e332513f75ad
Reviewed-by: Sona Kurazyan <sona.kurazyan@qt.io>
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Also documents the ownership of the traditional tryStart better, and
remove a redundant check.
Change-Id: I06202465b782926724fa33a901d08c1626f87373
Reviewed-by: Sona Kurazyan <sona.kurazyan@qt.io>
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Less \a fun though.
Note using references in this API would just duplicate the API, but
still end up with a copy when creating the QRunnable. By having the
copy apparent directly in the API, we not only save the duplication,
we also hint to the caller to use move if they want to avoid a copy.
Change-Id: If11476d4b38853839c1e87e0339807a1798fc875
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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This makes it easier to create one without having to create
a derivative class. The patch also adds a path to avoid using
QRunnable directly in QThreadPool.
Change-Id: I9caa7dabb6f641b547d4771c863aa6ab7f01b704
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Sona Kurazyan <sona.kurazyan@qt.io>
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Mark QWaitCondition:wait(..., ulong) as deprecated so they can be
removed in Qt6. Also replace the usages of this deprecated functions
inside QtCore.
Change-Id: I77313255fa05f5c112b0b40d4c55339cc4f85346
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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Avoid having the reset in waitForDone interfere with other uses of the
thread-pool by locking the mutex higher, and maintaining the state
so the queues doesn't have threads not in allThreads.
Task-number: QTBUG-62865
Change-Id: I17ee95d5f0e138ec15e785c6d61bb0fe064d3659
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
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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>
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Conflicts:
src/plugins/platforms/windows/qwindowsmousehandler.cpp
src/plugins/platforms/xcb/qxcbimage.cpp
tests/auto/network/access/qnetworkreply/tst_qnetworkreply.cpp
tests/manual/qtabletevent/regular_widgets/main.cpp
Done-with: Friedemann Kleint<Friedemann.Kleint@qt.io>
Done-with: Mårten Nordheim<marten.nordheim@qt.io>
Change-Id: I5b2499513a92c590ed0756f7d2e93c35a64b7f30
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Change-Id: I3cf73c53cf131d0babfb558c2507bed0e0fc5f08
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When many runnables are executed, this improves the
performance by not resizing the queue for each runnable,
which was the case in the previous version, because of
many calls to QVector::takeFirst().
Also add a test that makes sure tryTake() is safe to
call and does not leave the queue in a bad state that
tries to use nullptr entries.
Change-Id: I608134ecfa9cfc03db4878dcbd6f9c1107e13e90
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
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Conflicts:
src/gui/kernel/qguiapplication.cpp
src/platformsupport/input/libinput/qlibinputpointer.cpp
src/plugins/platforminputcontexts/ibus/qibusplatforminputcontext.h
src/plugins/platforms/cocoa/qcocoawindow.h
src/testlib/qtestsystem.h
Change-Id: I5975ffb3261c2dd82fe02ec4e57df7c0950226c5
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Fix warning
qthreadpool.h:61: warning: No documentation for 'QThreadPool::stackSize'
Amends e44ff1978344600cd9b1f41949697f0e877fd5cd.
Change-Id: I060de623b2befcc55846e1827b9cd58aacf3a3c0
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
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Remaining uses of Q_DECL_OVERRIDE are in:
src/corelib/global/qcompilerdetection.h
src/corelib/global/qglobal.cpp
doc/global/qt-cpp-defines.qdocconf
(definition and documentation of Q_DECL_OVERRIDE)
tests/manual/qcursor/qcursorhighdpi/main.cpp
(a test executable compilable both under Qt4 and Qt5)
Change-Id: Ib9b05d829add69e98a86238274b6a1fcb19b49ba
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
Reviewed-by: Ville Voutilainen <ville.voutilainen@qt.io>
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
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Allows setting the stack size for the thread pool
worker threads. Implemented using QThread::stackSize.
Task-number: QTBUG-2568
Change-Id: Ic7f3981289290685195bbaee977a23e0c3c49bf0
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
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(non static data member initializers)
Also, taking the absolute value of the idealThreadCount()
return value is no longer needed since the function now
returns 1 for the "CPU detection failure" case.
Change-Id: I2214fd15ed24413bba796ead38bbf1355dfd37d9
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
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Compilation and link times in CPU seconds with GCC 7, using precompiled
headers (not including moc, rcc, uic, etc. steps or headersclean):
Before After
Debug -O0 198,1 180,3
Debug -Og 240,7 229,2
Release -O3 267,1 249,2
Release LTO 239,4 229,8
QtCore required a little manual adjusting because some files are
bootstrapped into moc itself and into qmake.
Change-Id: I84e363d735b443cb9beefffd14b8b57c10e7da36
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>
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The cancel() function added in 5b11e43e for Qt 5.5 suffers from a
number of problems:
First, if runnable->autoDelete() is true, then the function suffers
from the ABA problem (see documentation written for trytake()).
Second, if runnable->autoDelete() is false, due to cancel() throwing
away crucial information instead of returning it, the caller cannot
know whether the runnable was canceled (and thus has to be deleted),
wasn't found or is currently executing (and thus mustn't be deleted),
or has finished executing (and can be used to extract the result).
Deprecate this dangerous API and replace it with the much more useful
Private::stealRunnable(), promoted to public API and renamed to
tryTake() for consistency with the rest of Qt.
Described the various caveats in the function's documentation.
[ChangeLog][QtCore][QThreadPool] The cancel() function suffers from
several subtle issues and has been replaced with a new tryTake()
function.
Change-Id: I93125935614087efa24b3e3969dd6718aeabaa4f
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
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QThreadPool maintains three containers of QThreadPoolThread*:
- allThreads, a QSet
- waitingThreads, a QQueue
- expiredThreads, also a QQueue
None of the operations on allThreads make use of QSets fast lookup.
The only functions called on it are isEmpty(), count(), insert(),
and swap().
Since therefore QSet adds nothing but overhead, causes indeterminism
(e.g. when deleting threads in Private::reset()) and code bloat, use
the same container for allThreads that underlies QQueue: QList.
Port insert() to append(). Add an assert to verify that we're not
running into an ABA problem here (but this should never fire, since
we're never deleting threads except in Private::reset(), where we
do remove them from allThreads), just in case.
Saves ~0.5KiB in text size on optimized Linux AMD64 GCC 7.0 builds.
Change-Id: I53a4d5ef2c204420f7c8852f1e72ab3d6ea43d08
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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For CoW types const methods will be called.
Mark store_persistent_indexes() as const,
because this method does not modify the object.
Change-Id: Ic867913b4fb5aaebfbaaffe1d3be45cf7b646403
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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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>
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Based on merge done by Liang Qi
Change-Id: Id566e5b9f284d29bff2199f13f9417c660f5b26f
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Qt3D is making heavy use of this, causing the QList node allocations
to be among the top 10 per frame allocation sources. Switching to
QVector fixes that.
Change-Id: I3b4df329710f82bf8d6797ea1f0c79b288a08063
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
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Saves just shy of 4KiB in text size on optimized GCC 4.9 Linux
AMD64 builds, iow: ~0.07% of the total QtCore library size.
Change-Id: I87fdcc8ee25c6bb5dabddb9a694ab4496b1538fa
Reviewed-by: David Faure <david.faure@kdab.com>
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
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Qt copyrights are now in The Qt Company, so we could update the source
code headers accordingly. In the same go we should also fix the links to
point to qt.io.
Outdated header.LGPL removed (use header.LGPL21 instead)
Old header.LGPL3 renamed to header.LGPL3-COMM to match actual licensing
combination. New header.LGPL-COMM taken in the use file which were
using old header.LGPL3 (src/plugins/platforms/android/extract.cpp)
Added new header.LGPL3 containing Commercial + LGPLv3 + GPLv2 license
combination
Change-Id: I6f49b819a8a20cc4f88b794a8f6726d975e8ffbe
Reviewed-by: Matti Paaso <matti.paaso@theqtcompany.com>
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[ChangeLog][QtCore][QThreadPool] Added QThreadPool::cancel() which allows
removing from the job queue a job that hasn't been started yet.
Change-Id: Ib8f1c1f32a34f5eec8338c641d820b928e470164
Reviewed-by: Nick Shaforostoff <shafff@ukr.net>
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
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Done automatically with clang-modernize on linux
(But does not add Q_DECL_OVERRIDE to the function that are marked
as inline because it a compilation error with MSVC2010)
Change-Id: I2196ee26e3e6fe20816834ecea5ea389eeab3171
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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- Renamed LICENSE.LGPL to LICENSE.LGPLv21
- Added LICENSE.LGPLv3
- Removed LICENSE.GPL
Change-Id: Iec3406e3eb3f133be549092015cefe33d259a3f2
Reviewed-by: Iikka Eklund <iikka.eklund@digia.com>
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The current synchronization mechanism was racy: decrementing waitingThreads
and then hoping that the wakeOne will wake a thread before its expiry
timeout happens. In other words, on timeout, a just-assigned task would
never run. And then no other task would run, if maxThreadCount is reached.
Fixed by using a queue of waiting threads (rather than just a count), and by
moving the wait condition into the thread itself, so we know precisely
which one we're waking up, and we can remove it from the set of waiting threads
before waking it up, and therefore it can determine on wakeup whether it
has work to do (caller removed it from the queue) or it expired (it's still
in the queue). This is reliable, whereas the return value from QWaitCondition::wait
isn't reliable, when the main thread has already decided that this thread
has work to do.
Task-number: QTBUG-3786
Change-Id: I1eac5d6c309daed7f483ac7a8074297bfda6ee32
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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Default values should have mark-up to denote that they are code.
This commit changes:
-"property is true" to "property is \c true".
-"Returns true" to "Returns \c true".
-"property is false" to "property is \c false".
-"returns true" to "returns \c true".
-"returns false" to "returns \c false".
src/3rdparty and non-documentation instances were ignored.
Task-number: QTBUG-33360
Change-Id: Ie87eaa57af947caa1230602b61c5c46292a4cf4e
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>
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QTBUG-21051 has a testcase where activeThreadCount() could actually
end up at -1 (converted to an autotest in this commit).
The reason was: start() calls tryStart() which returns false due to
too many active threads (reserveThread() causes this), so it calls
enqueueTask() - which actually wakes up the waiting thread, but
it didn't decrement the number of waiting threads.
Note that tryStart() is "if I can grab a waiting thread, enqueue task and wake it"
while start(), in case tryStart() fails, wants to "enqueue, and then if I can grab
a waiting thread, wake it". This is why enqueue shouldn't wake; waking must happen
only if we can grab a thread (d->waitingThreads > 0).
Task-number: QTBUG-21051
Change-Id: I3d98337103031c9bdf0bf365295f245be0c66aa7
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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Rather than trying to make it lock-free (which requires double-bookkeeping of
4 atomic ints!), just lock the mutex before calling it.
tst_bench_qthreadpool shows no difference whatsoever between the two
solutions, I get 0.005 msecs per iteration in startRunnables().
Of course looping over calls to activeThreadCount() is a bit slower,
from 0.0002 msecs per iteration to 0.00027 msecs, i.e. 35% more.
But polling activeThreadCount() from the app is a really wrong thing to
do anyway, this benchmark was just for my own curiosity about the
price of a mutex in a function that sums up 4 ints.
What matters is start() performance, which is unchanged (0.00007 msecs
is just noise compared to a 0.005 total, that's 1.4%).
Change-Id: I993444eef8bc68eff9badd581fae3626dfd1cc6d
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
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Task-number: QTBUG-31919
Change-Id: I2718566595622895f182191b5693e91c1ab1e7d0
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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QThreadPool::clear() method removes all queued QRunnable.
When a large number of long-running tasks are queud in a
QThreadPool its destruction, which calls waitForDone(), can
be quite long.
QThreadPool:clear() removes (and deletes when appropriate)
all QRunnable that have yet to be started from the queue
enabling a faster interruption.
Change-Id: Ie5d6028ad3cfe7e439d1db068c8d0936ff818db9
Reviewed-by: David Faure <david.faure@kdab.com>
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The optimisation done in cbaf52b09971edf6f3e1458f7dd677b80a1568ed for Qt
5.0 got the order wrong of the comparison. The queue must be sorted in
decreasing priority order. But since higher numbers mean higher
priority, that means the queue must be sorted in decreasing priority
number order.
Task-number: QTBUG-29163
Change-Id: Iaf3424b9bb445bf5c71518927f37253cead454f3
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
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Remove all trailing whitespace from the following list of files:
*.cpp *.h *.conf *.qdoc *.pro *.pri *.mm *.rc *.pl *.qps *.xpm *.txt *README
excluding 3rdparty, test-data and auto generated code.
Note A): the only non 3rdparty c++-files that still
have trailing whitespace after this change are:
* src/corelib/codecs/cp949codetbl_p.h
* src/corelib/codecs/qjpunicode.cpp
* src/corelib/codecs/qbig5codec.cpp
* src/corelib/xml/qxmlstream_p.h
* src/tools/qdoc/qmlparser/qqmljsgrammar.cpp
* src/tools/uic/ui4.cpp
* tests/auto/other/qtokenautomaton/tokenizers/*
* tests/benchmarks/corelib/tools/qstring/data.cpp
* util/lexgen/tokenizer.cpp
Note B): in about 30 files some overlapping 'leading tab' and
'TAB character in non-leading whitespace' issues have been fixed
to make the sanity bot happy. Plus some general ws-fixes here
and there as asked for during review.
Change-Id: Ia713113c34d82442d6ce4d93d8b1cf545075d11d
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
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Change-Id: Ic804938fc352291d011800d21e549c10acac66fb
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
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Change copyrights and license headers from Nokia to Digia
Change-Id: If1cc974286d29fd01ec6c19dd4719a67f4c3f00e
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
Reviewed-by: Sergio Ahumada <sergio.ahumada@digia.com>
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Replace them with std::upper_bound; this allows for deprecation of
qUpperBound.
Change-Id: Idef01d2228b9a70eee3d52931d7aedb5bb6ba902
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
Reviewed-by: Robin Burchell <robin+qt@viroteck.net>
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Change-Id: I19100755c97cc155c76a859e19940e9f9222d34e
Reviewed-by: Casper van Donderen <casper.vandonderen@nokia.com>
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The code under mutex protection already implicitly handles the case where
queue.empty(), so just removing the pre-lock check suffices.
Change-Id: I01467aff62e61bb4efd16359dd64546ff51c6bad
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
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This is the C++98 version of std::move().
Change-Id: Icb73da16bb05bf07114a38e4fd48732b612e2d51
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
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The resulting code is easier to understand, too.
Change-Id: I3cd84d85b3186860dd3ccd67c3771b82695e7f83
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
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Fix some foward references from QtCore in addition. This
will require more work.
Change-Id: Ib1bade18c2cc220a7afe25e9fca6a3f50cb1174b
Reviewed-by: Casper van Donderen <casper.vandonderen@nokia.com>
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The qdoc manual currently claims that the command must stand on its own line.
The change follows the consistency with the rest and how the example looks like
inside the qdoc manual for this command.
Change-Id: I6b653dc95cf9d84e4adf32220dace5d313678419
Reviewed-by: Casper van Donderen <casper.vandonderen@nokia.com>
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This change fixes most qdoc errors in QtCore. There are about 900 left.
The main thing this change does is moving documentation from qtcore from
/doc/src to /src/corelib/doc.
Other issues resolved are mis-use of qdoc commands.
Change-Id: I002d01edfb13575e8bf27ce91596a577a92562d1
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>
Reviewed-by: Jason McDonald <jason.mcdonald@nokia.com>
Reviewed-by: Jerome Pasion <jerome.pasion@nokia.com>
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Change-Id: I1515a65fab37588372794422a43ed09ac076e108
Reviewed-by: Bradley T. Hughes <bradley.hughes@nokia.com>
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the most-common case is: queue is empty or filled with tasks of
the same priority; so the runnable would be put at the end of queue.
both checks are cheap for us.
also avoid detach()'ing by using const iterators
Change-Id: Iab2255f852211f9accc8d717f778671661210ef3
Reviewed-by: Bradley T. Hughes <bradley.hughes@nokia.com>
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