When a foreign event loop that does not enter an alertable wait state
is running (which is also the case when a native dialog window is
modal), pipe handlers would freeze temporarily due to their APC
callbacks not being invoked.
We address this problem by moving the I/O callbacks to the Windows
thread pool, and only posting completion events to the main loop
from there. That makes the actual I/O completely independent from
any main loop, while the signal delivery works also with foreign
loops (because Qt event delivery uses Windows messages, which foreign
loops typically handle correctly).
As a nice side effect, performance (and in particular scalability)
is improved.
Several other approaches have been tried:
1) Using QWinEventNotifier was about a quarter slower and scaled much
worse. Additionally, it also required a rather egregious hack to
handle the (pathological) case of a single thread talking to both
ends of a QLocalSocket synchronously.
2) Queuing APCs from the thread pool to the main thread and also
posting wake-up events to its event loop, and handling I/O on the
main thread; this performed roughly like this solution, but scaled
half as well, and the separate wake-up path was still deemed hacky.
3) Only posting wake-up events to the main thread from the thread pool,
and still handling I/O on the main thread; this still performed
comparably to 2), and the pathological case was not handled at all.
4) Using this approach for reads and that of 3) for writes was slightly
faster with big amounts of data, but scaled slightly worse, and the
diverging implementations were deemed not desirable.
Fixes: QTBUG-64443
Change-Id: I66443c3021d6ba98639a214c3e768be97d2cf14b
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@gmx.de>
Remove the qmake project files for most of Qt.
Leave the qmake project files for examples, because we still test those
in the CI to ensure qmake does not regress.
Also leave the qmake project files for utils and other minor parts that
lack CMake project files.
Task-number: QTBUG-88742
Change-Id: I6cdf059e6204816f617f9624f3ea9822703f73cc
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Kai Koehne <kai.koehne@qt.io>
Complete search and replace of QtTest and QtTest/QtTest with QTest, as
QtTest includes the whole module. Replace all such instances with
correct header includes. See Jira task for more discussion.
Fixes: QTBUG-88831
Change-Id: I981cfae18a1cabcabcabee376016b086d9d01f44
Pick-to: 6.0
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
Apparently some library definitions went overboard, link them directly.
Pick-to: 6.0
Change-Id: I009737f7e3edff5619241b700a627dc4e25e6018
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
This reverts commit ee122077b0.
Reason for revert: This causes QProcess::readAll() to sometimes
return nothing after the process has ended.
Fixes: QTBUG-88624
Change-Id: I34fa27ae7fb38cc7c3a1e8eb2fdae2a5775584c2
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
Reviewed-by: Paul Wicking <paul.wicking@qt.io>
(cherry picked from commit 23100ee61e33680d20f934dcbc96b57e8da29bf9)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
When a foreign event loop that does not enter an alertable wait state
is running (which is also the case when a native dialog window is
modal), pipe handlers would freeze temporarily due to their APC
callbacks not being invoked.
We address this problem by moving the I/O callbacks to the Windows
thread pool, and only posting completion events to the main loop
from there. That makes the actual I/O completely independent from
any main loop, while the signal delivery works also with foreign
loops (because Qt event delivery uses Windows messages, which foreign
loops typically handle correctly).
As a nice side effect, performance (and in particular scalability)
is improved.
Several other approaches have been tried:
1) Using QWinEventNotifier was about a quarter slower and scaled much
worse. Additionally, it also required a rather egregious hack to
handle the (pathological) case of a single thread talking to both
ends of a QLocalSocket synchronously.
2) Queuing APCs from the thread pool to the main thread and also
posting wake-up events to its event loop, and handling I/O on the
main thread; this performed roughly like this solution , but scaled
half as well, and the separate wake-up path was still deemed hacky.
3) Only posting wake-up events to the main thread from the thread pool,
and still handling I/O on the main thread; this still performed
comparably to 2), and the pathological case was not handled at all.
4) Using this approach for reads and that of 3) for writes was slightly
faster with big amounts of data, but scaled slightly worse, and the
diverging implementations were deemed not desirable.
Fixes: QTBUG-64443
Change-Id: I1cd87c07db39f3b46a2683ce236d7eb67b5be549
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@gmx.de>
Modify special case locations to use the new API as well.
Clean up some stale .prev files that are not needed anymore.
Clean up some project files that are not used anymore.
Task-number: QTBUG-86815
Change-Id: I9947da921f98686023c6bb053dfcc101851276b5
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
The explicit paint event on QtGui and QPA level allows us to untangle
the expose event, which today has at least 3 different meanings.
It also allows us to follow the platform more closely in its semantics
of when painting can happen. On some platforms a paint can come in
before a window is exposed, e.g. to prepare the first frame. On others
a paint can come in after a window has been de-exposed, to save a
snapshot of the window for use in an application switcher or similar.
The expose keeps its semantics of being a barrier signaling that the
application can now render at will, for example in a threaded render
loop.
There are two compatibility code paths in this patch:
1. For platform plugins that do not yet report the PaintEvents
capability, QtGui will synthesize paint events on the platform's
behalf, based on the existing expose events coming from the platform.
2. For applications that do not yet implement paintEvent, QtGui will
send expose events instead, ensuring the same behavior as before.
For now none of the platform plugins deliver paint events natively,
so the first compatibility code path is always active.
Task-numnber: QTBUG-82676
Change-Id: I0fbe0d4cf451d6a1f07f5eab8d376a6c8a53ce8c
Reviewed-by: Paul Olav Tvete <paul.tvete@qt.io>
The previous implementation multiplexed callback-based event
notification into a single proxy event (cf. 85403d0af), which was
in turn object-waited for (this was the case since the beginning
of public qt history). It makes more sense to multiplex into a
posted message, because that also works with foreign event loops
that do not know anything about our event objects.
Task-number: QTBUG-64443
Change-Id: I97945ac8b5d7c8582701077134c0aef4f3b5a18f
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@gmx.de>
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
Use pro2cmake with '--api-version 2' to force regenerate
projects to use the new prefixed qt_foo APIs.
Change-Id: I055c4837860319e93aaa6b09d646dda4fc2a4069
Reviewed-by: Joerg Bornemann <joerg.bornemann@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>
Windows unexpectedly passes PM_NOYIELD flag in wParam parameter to the
hook procedure, if ::PeekMessage(..., PM_REMOVE | PM_NOYIELD) is called
from the event loop. So, to ignore undocumented flag, we should
interpret wParam as a bit field.
Thanks to Robin Lobel for research.
Pick-to: 5.15
Fixes: QTBUG-84562
Change-Id: Ib16d7d747aebc9a3628e4ee67478c4d3edeb96f1
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
According to Windows docs, GetMessage() function retrieves the messages
from the input queue in defined order, where posted messages are
processed ahead of input messages, even if they were posted later.
Therefore, if the application produces a posted event permanently, as
a result of processing that event, user input messages may be blocked
due to hard CPU usage by the application.
It's not a problem, if an internal Qt event loop is running. By calling
sendPostedEvents() on the beginning of processEvents(), we are sending
posted events only once per iteration. However, during execution of
the foreign loop, we should artificially lower the priority of the
WM_QT_SENDPOSTEDEVENTS message in order to enable delivery of other
input messages.
To solve the problem, it is proposed to postpone the
WM_QT_SENDPOSTEDEVENTS message until the message queue becomes empty,
as it works for the internal loop.
Task-number: QTBUG-77464
Change-Id: I8dedb6837c6fc41aa6f497e67ab2352c2b4f3772
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>
Otherwise, we get a warning:
QWARN : tst_NoQtEventLoop::consumeSocketEvents() QWindowsContext::windowsProc: No Qt Window found for event 0x2a3 (WM_MOUSELEAVE), hwnd=0x0x9b80646.
in the event loop which is running by another test. So, add missing
'delete' call.
Change-Id: Ib9b24155bdd6e78062a5234c317c9f878906e413
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
tst_noqteventloop.cpp 'event' overrides a member function but is not marked 'override' [-Winconsistent-missing-override]
tst_qtreeview.cpp 'canFetchMore' overrides a member function but is not marked 'override' [-Winconsistent-missing-override]
tst_qtreeview.cpp 'fetchMore' overrides a member function but is not marked 'override' [-Winconsistent-missing-override]
tst_qtreeview.cpp 'hasChildren' overrides a member function but is not marked 'override' [-Winconsistent-missing-override]
tst_qtreeview.cpp 'rowCount' overrides a member function but is not marked 'override' [-Winconsistent-missing-override]
tst_qtreeview.cpp 'columnCount' overrides a member function but is not marked 'override' [-Winconsistent-missing-override]
tst_qtreeview.cpp 'index' overrides a member function but is not marked 'override' [-Winconsistent-missing-override]
tst_qtreeview.cpp 'parent' overrides a member function but is not marked 'override' [-Winconsistent-missing-override]
tst_qtreeview.cpp 'data' overrides a member function but is not marked 'override' [-Winconsistent-missing-override]
tst_qtextedit.cpp 'begin' overrides a member function but is not marked 'override' [-Winconsistent-missing-override]
tst_qtextedit.cpp 'end' overrides a member function but is not marked 'override' [-Winconsistent-missing-override]
tst_qtextedit.cpp 'updateState' overrides a member function but is not marked 'override' [-Winconsistent-missing-override]
tst_qtextedit.cpp 'drawPixmap' overrides a member function but is not marked 'override' [-Winconsistent-missing-override]
tst_qtextedit.cpp 'type' overrides a member function but is not marked 'override' [-Winconsistent-missing-override]
Change-Id: I2a0c5da15994619383c1f90fee311927e58d7af0
Reviewed-by: Jesus Fernandez <Jesus.Fernandez@qt.io>
- Determine window sizes according to screen size and turn off
scrolling.
- Center the window to get it out of the way of taskbars.
- Make the window top-most.
- Turn off scaling so that coordinates passed to the QWindow
child match device coordinates and the child is positioned
correctly.
- Make the child window a yellow raster window for easier
debugging.
Task-number: QTBUG-45956
Change-Id: I05864770f8ed638d0a36f3e3f2afed73d2952436
Reviewed-by: Oliver Wolff <oliver.wolff@qt.io>
Use the new qtConfig macro in all pro/pri files.
This required adding some feature entries, and adding
{private,public}Feature to every referenced already existing entry.
Change-Id: I164214dad1154df6ad84e86d99ed14994ef97cf4
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
Remove #ifdef sections for Q_OS_WINCE and wince .pro file clauses in library,
and tests.
Task-number: QTBUG-51673
Change-Id: I55f61845c3b54027c467a5c59c122e7d16955358
Reviewed-by: Lars Knoll <lars.knoll@theqtcompany.com>
From Qt 5.7 -> tools & applications are lisenced under GPL v3 with some
exceptions, see
http://blog.qt.io/blog/2016/01/13/new-agreement-with-the-kde-free-qt-foundation/
Updated license headers to use new GPL-EXCEPT header instead of LGPL21 one
(in those files which will be under GPL 3 with exceptions)
Change-Id: I42a473ddc97101492a60b9287d90979d9eb35ae1
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Lars Knoll <lars.knoll@theqtcompany.com>
While a native dialog is open, the application message queue is
handled by the native event loop which is external to Qt. In this
case, QEventDispatcherWin32::processEvents() does not run and socket
notifiers will not be activated. So, this patch moves the notifier
activation code into the window procedure, which enables socket
event processing with native dialogs.
Task-number: QTBUG-49782
Task-number: QTBUG-48901
Change-Id: Icbdd96b2e80c50b73505f4fe74957575b83d6cf1
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
Reviewed-by: Kai Koehne <kai.koehne@theqtcompany.com>
Reviewed-by: Joerg Bornemann <joerg.bornemann@theqtcompany.com>
Move some code (like registrations of meta types) from init() to
initTestCase() in the process.
Change-Id: I57db5156647cfadab554fbed853b2e68b2815f3b
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@theqtcompany.com>
If Qt is not running its own event loop (e.g. if Qt is a plugin running
in a non-Qt host application with its own event loop, a call to
sendPostedEvents() should process all events by default, and not depend
on the flags passed to the last call to processEvents()
We also modify sendPostedEvents() to call its base implementation instead
of directly calling QCoreApplication::sendPostedEvents(). (The behavior of
the base implementation is the same, so no behavior change there).
This also adds a test for QWindow event handling without Qts event loop is
running. This is a black box test, just to ensure that basic functionality
is working. It can be extended later.
Task-number: QTBUG-45956
Change-Id: I7d688c0c6dec5f133fb495f07526debdde5389af
Reviewed-by: Jørgen Lind <jorgen.lind@theqtcompany.com>
