Commit Graph

21386 Commits (c3084f101d5ebb0719b2575663d2d3fdb9266005)

Author SHA1 Message Date
Richard Moe Gustavsen c3084f101d iOS: accept window modal message dialogs
Although we cannot really show anything but application modal
dialogs on iOS, falling back to using non-native dialogs for
window modal seems unnecessary strict; In practice you will
never have a work flow on iOS where you have several windows
visible, and at the same time, need to show a dialog that
blocks only one of them.

This patch will lift the restriction, and handle window modal
as application modal on iOS.

Task-number: QTBUG-55909
Change-Id: I581c1a47724ee2bfc2e041672c82c25ed34b2b2d
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@theqtcompany.com>
2016-09-15 14:25:27 +00:00
Victor Kropp 0dedb60385 Save temp icon in higher resolution on HiDPI screens
In case temporary system tray icon is saved to /tmp, scale it according
to current devicePixelRatio() instead of using hardcoded 22x22.

Change-Id: I2adf2151da3241f4600f8645e323346daabcec4b
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>
2016-09-15 14:18:34 +00:00
Richard Moe Gustavsen 1eb74c9f10 QIOSTextInputOverlay: compile with Xcode 8 beta / iOS 10
The iOS 10 SDK have introduced a protocol CAAnimationDelegate, which is
required for CAAnimation delegates. So we let our delegate implement it.
Since the SDK is not out yet, we need to support both version 9 and 10
for now.

Change-Id: I2624d8150c39439540a6554cba4921e3b9a2f0cf
Reviewed-by: Jake Petroules <jake.petroules@qt.io>
2016-09-12 07:51:33 +00:00
Maurice Kalinowski cf88d74466 winrt: Fix file dialog handling for Windows Phone
Windows Phone needs to use activation targets to properly handle the
return value of a file dialog. 0f9ca217d0
introduced launching an app via different modes, but broke above use-
case for Windows Phone.

Hence, we first check if a dispatcher exists and use this one to forward
the activation.

Task-number: QTBUG-54342
Change-Id: If9dd2df9a45e9aa104775530c695325fe6f684f2
Reviewed-by: Oliver Wolff <oliver.wolff@qt.io>
2016-09-06 12:15:32 +00:00
Liang Qi 657c2bfbec Merge remote-tracking branch 'origin/5.6' into 5.7
Conflicts:
	tests/auto/testlib/selftests/generate_expected_output.py

Change-Id: If856162abf9a24ae2c9946d336a7d1da03520fa7
2016-09-05 13:57:12 +02:00
Peng Wu b94111116f Style sheets: detect and apply font set on QHeaderView section
Detect and apply style sheets font set when calculating
QHeaderView section content size and drawing it.

Change-Id: I542cd0d31bbe62f127c509f297eef0a576fec054
Task-number: QTBUG-55597
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
2016-09-04 05:12:20 +00:00
Allan Sandfeld Jensen 24bd7fd651 Fix crash when rendering to grayscale8 images
An entry was missing in one of the tables. This patch adds it back in
and adds the enum comments used to keep track of whether they all are
there and correctly set.

Change-Id: Ic6a55a8f81f9c42a3174a2a75c80c3a354f173b7
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
2016-09-03 08:25:23 +00:00
Allan Sandfeld Jensen c8cb188dd4 Ensure the fontdatabase is initialized when requesting fallbacks
Otherwise we will return an empty list of fallbacks if no QFontDatabase
has been created yet.

Task-number: QTBUG-55222
Change-Id: I50508162fad3206e0acf3cc6eb39aefac5c3e197
Reviewed-by: Peter Varga <pvarga@inf.u-szeged.hu>
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@qt.io>
2016-09-03 08:25:10 +00:00
Marc Mutz 2a6bea7a55 qcompilerdetection.h: retract Q_COMPILER_DEFAULT_MEMBERS for MSVC < 2015
Earlier versions of the compiler cannot default
move special member functions, even though we
also define Q_COMPILER_RVALUE_REFS for them.

Fix by retracting the less-often-used of the
two compiler feature defines.

Q_COMPILER_DEFAULT_MEMBERS is not used outside
QtBase in neither 5.6 nor 5.7 (5.8 is not
released at this time, so wasn't considered).
The same is true of the dependent macros
Q_COMPILER_DEFAULT_DELETE_MEMBERS and
Q_DECL_EQ_DEFAULT.

In QtBase, the three uses are:
1. in QAtomic*, where the user also requires
   Q_COMPILER_CONSTEXPR, which is not defined
   for any MSVC at this time,
2. for QEnableSharedFromThis, which is a class
   template with an alternative {} implementa-
   tion of the default constructor, and uncon-
   ditional user-defined copy special member
   functions.
3. The test of the corresponding functionality
   in tst_compiler, which this commit amends.

That means that neither of these two only uses
of the macro in Qt libraries are affected by
the change.

The reason we do this change, then, is that in
the future, we want to be able to more easily
restore move special member functions for
classes for which they are suppressed due to
user-defined dtors or copy special member
functions.

Change-Id: I6f88cad66d6b87a758231f16355c3bddae697b86
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
2016-09-03 05:11:40 +00:00
Marc Mutz 312d08b290 qstrncpy: don't call strncpy_s with invalid parameters
According to https://msdn.microsoft.com/en-us/library/5dae5d43.aspx,
strncpy_s' second argument must not be 0:

> If strDest or strSource is NULL, *or numberOfElements is 0*, the
> invalid parameter handler is invoked.

Move the existing check for len > 0 up to protect the strncpy_s
call, too.

Change-Id: I70d339ea60d4b76f3038b2e4e4756f6590a9bd31
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
2016-09-03 05:07:54 +00:00
Dyami Caliri 816a623876 uic: generate translate calls with Q_NULLPTR instead of 0
uic should use Q_NULLPTR instead of 0 as the default disambiguation
context.

Task-number: QTBUG-45291
Change-Id: I889182c7fe1c4be3336f3cd645aa60838863c633
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
2016-09-03 05:07:50 +00:00
Jake Petroules 013210e9da Fix unused variable warning on iOS
Change-Id: Ieae5d7833b45a49a743a52a437d5383bd8a962c5
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
2016-08-31 22:15:57 +00:00
Friedemann Kleint fa2aef5eb8 Fix QWindowPrivate::globalPosition() for foreign windows
Use mapToGlobal(QPoint(0, 0)) when encountering a foreign window in
the parent hierarchy as it is not clear whether it is a native
top level or child. In the latter case, using the position is not
sufficient.

Task-number: QTBUG-43252
Change-Id: I5eebb1f0dbc6a0abbd968c5d383d3eded75c11a5
Reviewed-by: Jan Arve Sæther <jan-arve.saether@theqtcompany.com>
2016-08-30 12:48:39 +00:00
Friedemann Kleint 531a2b1b1c Windows QPA: Fix leaks in native file dialogs
Release the IShellItem instances according to the
documentation of IFile[Open]Dialog.

Task-number: QTBUG-55509
Task-number: QTBUG-55459
Change-Id: Ib79622cde21982b1bda0be7d0483c6e652a1d5fe
Reviewed-by: Andreas Holzammer <andreas.holzammer@kdab.com>
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
Reviewed-by: Maurice Kalinowski <maurice.kalinowski@qt.io>
2016-08-30 12:48:15 +00:00
Andy Shaw 2ca4fd401b QIcon: Set the pixmap's dpr to 1.0 if the window is also set to 1.0
When the pixmap is initially from a higher device pixel ratio and it is
being used on a window that does not have a device pixel ratio other
than 1.0 set then the pixmap should also have it set to 1.0. This ensures
that the size of the pixmap is preserved and it is not scaled down as a
result on the normal display.

Change-Id: Ie5d96b3e1508867b723000bea182c8157640af02
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
2016-08-30 12:48:14 +00:00
Friedemann Kleint 579283507c QWin32PrintEngine: Fix uninitialized memory read of dpi_x, dpi_y
Discovered by purify:
QWin32PrintEnginePrivate::initialize() called updateMetrics()
via updatePageLayout() after initHDC(), so dpi_x, dpi_y
were accessed before initialized from the display resolution.
Fix by moving the call initHDC() up and giving default
values.

Change-Id: Ia360c06d156e569ca6b1472ec5b5cdc52948f913
Reviewed-by: Andy Shaw <andy.shaw@qt.io>
2016-08-30 12:02:09 +00:00
Tor Arne Vestbø ce2815b43c Guard against calling QWindow::requestUpdate() on non-GUI threads
Change-Id: I851ff672bc234146deb61615fc7c56df87d62065
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>
Reviewed-by: Timur Pocheptsov <timur.pocheptsov@theqtcompany.com>
2016-08-30 11:43:35 +00:00
Olivier Goffart 17e5d9d7ca Fix QMainWindow::restoreDockWidget() with GroupedDragging
We need to account for the fact that the placeholder might be in a
floating tab.

Task-number: QTBUG-50491
Change-Id: I03d8e49cc40f58691154f5c3984f3b0670a974d5
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Reviewed-by: Sérgio Martins <sergio.martins@kdab.com>
2016-08-30 11:42:18 +00:00
Friedemann Kleint 710ff392d9 QIcon::addFile(): Invoke QMimeDatabase when matching by suffix fails
This will detect image files correctly even if case resource aliases
without suffixed are used.

Task-number: QTBUG-55388
Change-Id: I337ca1f6be7126fe731e5e278b23aaef6cdfd9ef
Reviewed-by: Eirik Aavitsland <eirik.aavitsland@qt.io>
2016-08-30 07:52:19 +00:00
Tor Arne Vestbø dcfb814498 Cocoa: Add support for triple-buffered GL contexts
As usual, the requested format may not be available, so clients should
check the actual format to confirm triple-buffering.

Change-Id: Icf073cc9ddf2c912eb5c3ce0ac80d1694d1c56d7
Reviewed-by: Jake Petroules <jake.petroules@qt.io>
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>
2016-08-29 10:11:52 +00:00
Liang Qi cc74452d6d Merge remote-tracking branch 'origin/5.6' into 5.7
Conflicts:
	configure
	src/plugins/platforms/winrt/qwinrtclipboard.cpp

Change-Id: Ic6d58be3d1ed2bb507f2ba06c82361afd9f9ddb9
2016-08-29 08:13:40 +02:00
Samuel Gaist e52fcb7dc7 QTextDocument: fix string backward search
[ChangeLog][QtGui][QTextDocument] Fixed a bug that would return a wrong
position when searching backward from the end of the document.

Task-number: QTBUG-48182
Change-Id: I6e88f808a50cb840f61e7bc579e2a28c5300089d
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
2016-08-28 15:18:55 +00:00
Thorbjørn Lindeijer d7d8cde4bb QColorDialog::getRgba: Fixed ignoring of initial alpha value
The documentation for this method explicitly states that the initial
color+alpha is used, but its implementation used a QColor constructor
that ignores the alpha value.

Change-Id: I71721386e7fae0761e079d8840ec0124a8c14e33
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
Reviewed-by: Thorbjørn Lindeijer <bjorn@lindeijer.nl>
2016-08-26 22:18:02 +00:00
Nico Vertriest 6cbd982836 Revert "Doc: removed reference to non-existing method"
This reverts commit 53f0b43a4b.
{QAbstractAnimation::}{updateCurrentValue()} had been modified to
{QVariantAnimation::}{updateCurrentValue()} in a previous patch.

Change-Id: Ibaccf51de816966f16b8f3109e0c20626d5102a8
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
2016-08-26 11:40:11 +00:00
Marc Mutz d875a04174 QtJson: simplify/add missing relational operators involving Latin1String
As noted by Mat Sutcliffe <oktal3700@gmail.com>, there were
no relational operators for Latin1String/QLatin1String and
String/QLatin1String mixed comparisons, leading to implicit
conversions from QL1S to QString in Entry::op==(QL1S).

This patch fixes half of the issue, by providing the operators
for Latin1String/QLatin1String. In doing so, it cleans up their
definition (non-members, non-friends, delegating to existing
QL1S operators where possible, passing both {Q,}Latin1String by
value, as they're both Trivially Copyable and small).

A follow-up patch will deal with String/QLatin1String
comparisons. It will be not quite as straight-forward as
this patch, since we don't, yet, have QStringView, the
UTF-16 equivalent of QL1S, available.

Amends a5159cc50a.

Change-Id: I596358eb3ccf847b7680f171f9992f3fad80132c
Reviewed-by: Mat Sutcliffe <oktal3700@gmail.com>
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
2016-08-26 08:25:31 +00:00
Friedemann Kleint 1e85ca2e62 QAbstractSpinBox: Clear 'cleared' flag on receiving a keypress
Prevent QAbstractSpinBoxPrivate::interpret() from bailing out
in focus changes after text has been entered.

Task-number: QTBUG-55249
Change-Id: I250b3c50f7db5de2e9356038df20f18ee059df11
Reviewed-by: Maurice Kalinowski <maurice.kalinowski@qt.io>
2016-08-25 17:29:51 +00:00
Maurice Kalinowski c0a513d55f winrt: avoid duplicate signal emit
emitChanged() will be invoked when the system notifies the application
about a clipboard change. Hence, there is no need to call it previously
and cause two signals on the same change to be emitted.

Change-Id: I99605c9a71054e0610006dbeaaa90c5fb2f46755
Reviewed-by: Oliver Wolff <oliver.wolff@qt.io>
2016-08-25 17:29:15 +00:00
Maurice Kalinowski ea4aa5b722 winrt: store mimedata in clipboard
In addition to setting the clipboard, we also need to store the mimedata
being passed. Otherwise requesting the mimedata returns a different
object, causing comparisons to fail.

Change-Id: I2ffea76e78be091cb98426e387619ac6788ea270
Reviewed-by: Oliver Wolff <oliver.wolff@qt.io>
2016-08-25 17:29:05 +00:00
Maurice Kalinowski 5f895fe0e2 winrt: Check validity of options shared pointer
QErrorMessage autotests managed to create a scenario where the options
are not initialized yet, causing a crash later on.

Change-Id: Iabad6f181f2bfdc81a9c73f0e67c8ba70753fec6
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Reviewed-by: Oliver Wolff <oliver.wolff@qt.io>
2016-08-25 17:28:55 +00:00
Liang Qi 13680ceb9a Merge "Merge remote-tracking branch 'origin/5.6' into 5.7" into refs/staging/5.7 2016-08-25 16:08:09 +00:00
Liang Qi c7cdf3aac7 Merge remote-tracking branch 'origin/5.6' into 5.7
Conflicts:
	src/corelib/mimetypes/qmimeprovider.cpp
	src/corelib/mimetypes/qmimetype.cpp

Change-Id: Ib483ddb6bfc380e7c8f195feca535703814c3872
2016-08-25 16:12:11 +02:00
Edward Welbourne 3525ede0a5 QOffscreenSurface: warning-fix - QString(char*) deprecated
Passing a string literal to QWindow::setObjectName() is rude:
it wants a QString.

Change-Id: Ic4c1079889002f0d5f1028c443456a8be0b7b0fe
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@theqtcompany.com>
2016-08-25 13:25:13 +00:00
Alex Trotsenko f063cb7f81 QAbstractSocket: replace a reference to outdated state in documentation
Change-Id: I4acaed88a46acae1ad117b0a95141b20d8744e12
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
Reviewed-by: Topi Reiniö <topi.reinio@theqtcompany.com>
2016-08-25 12:49:13 +00:00
Ulf Hermann de7f281d7a QLocale: Fix wrong assert
The endptr from reading the exponent of a 'g' form snprintf result
should not be past the end of the string we're reading from. It has
nothing to do with the 'e' sign.

Task-number: QTBUG-54482
Change-Id: I8bdee917b8d21fdc94c255548ad7e008431a07fa
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
2016-08-25 12:45:50 +00:00
Allan Sandfeld Jensen 68c2bf1a1a Correct use of qt_div_255
qt_div_255 does a fast rounded division, the form of rounding is however
only valid for positive integers.

Correct one case where it was used incorrectly and add it one place
it would be valid, and adds a comment to the function.

We were using the optimization (x*a + y*(255-a))/255 ==
(x-y)*a/255 + y but that makes the division by 255 potentially
negative.

Change-Id: Ie53aa82b66ef801f5d43f8d2ec48880cb4972f69
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
2016-08-25 12:12:14 +00:00
Oswald Buddenhagen e41263b61a fix build with qt-xcb and another installed qt in a system location
amends fc1092cf, necessary because of (the earlier) a28364bc1.

Change-Id: I5c86bcb27854994e59228fd205c799396464554d
Reviewed-by: Jake Petroules <jake.petroules@qt.io>
2016-08-25 12:08:56 +00:00
Friedemann Kleint 4f3b5fab38 QWidgetPrivate::setWindowFlags(): Fix checking for changes in Qt::Window
Store the result of the comparison before the calling QWidget::setParent()
passing the flags which can modify q->data->window_flags.
Previously, this led to the condition triggering when a child window
was becoming top level, causing the geometry to be changed (notably for
fullscreen windows on Windows, where fullscreen is merely emulated).

Amends change 5e99b07a07.

Task-number: QTBUG-54906
Change-Id: I9369d7d9f886451cfdb933746a4572593ffa074a
Reviewed-by: Andy Shaw <andy.shaw@qt.io>
2016-08-25 12:05:55 +00:00
Friedemann Kleint 1e6630b54c Fix crash when exiting while stacked modal dialogs are shown
Remove QWindow instance from QGuiApplicationPrivate::modalWindowList
in the destructor.

Task-number: QTBUG-54566
Change-Id: I1f07fb46a371f69f04907b20657f3b05571445bd
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
Reviewed-by: Gabriel de Dietrich <gabriel.dedietrich@qt.io>
2016-08-25 06:50:32 +00:00
Friedemann Kleint d0012ad64c Windows style: Scale more native metrics per monitor
Fix a few places that were overlooked in
change 29c6e39086.

Most notably, fixes MDI subwindow titles disappearing
when moving windows between monitors.

Task-number: QTBUG-49374
Change-Id: Ie6ffabc4909064e649a3820d9aa952f3991ef06b
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
2016-08-25 06:50:22 +00:00
Lorn Potter 2aea77dbcb Fix UI freeze when using network-manager bearer plugin
This reduces the amount of dbus signals generated when many wifi AP's
are around

Task-number: QTBUG-54814
Change-Id: I4bdd5f0bfe173d6db63f3d975a98583c6c0fc5db
Reviewed-by: Richard J. Moore <rich@kde.org>
2016-08-24 23:39:10 +00:00
Marc Mutz 6a44c0ee75 QKeySequence: remove 239 unneeded relocations
Same change as in QColor (d38f86e50b).

  relocs: -239
  text:   -586B
  data:  -3840B

(optimized GCC 6.1 Linux AMD64 build).

Change-Id: I180e9b65736481dd4e82dc68ef6c3f7541e205cf
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
2016-08-24 21:48:52 +00:00
Marc Mutz 6a35c6d491 QKeySequence: replace an array end marker by static size calculation
This improves code generation, since the compiler statically knows
the number of loop iterations. But it also fixes a compile-error
on Clang with a following change of the name field from char* to
char[].

Change-Id: I7ef18adf3cb9b34cd1b7235cb35cf26b7e349d92
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
2016-08-24 21:48:35 +00:00
Tor Arne Vestbø d856d0e146 Limit glyph caches per QFontEngine to four per context, not four in total
The limitation of four glyph caches per font engine was to prevent memory
spikes during rotation of text. But in an application with multiple top
level OpenGL windows, each with their own context, we'd end up trashing
the list of glyph caches during rendering, even if each window just drew
the same static text.

Having a shared context between the windows helped a bit, but had other
performance issues due to the globally shared state, so the better approach
is to limit the caches to four per context.

This brings the multiwindow manual test from a grinding 4fps on macOS
to a smooth 60fps for 20 concurrent windows.

Task-number: QTBUG-52372
Change-Id: I26edd5f6edb5c7818e14b2203af062df19ae7127
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
2016-08-24 20:56:14 +00:00
Tor Arne Vestbø 59ee2584e2 Make QWindow backed QOffscreenSurfaces easier to identify
Change-Id: I2b4d9b752f4b356cb3b0019dcfd4aab2edc30e94
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>
2016-08-24 20:56:08 +00:00
Jake Petroules acfc1cc362 Fix warning: 'UITextInputTextFontKey' is deprecated
first deprecated in iOS 8.0 - Use NSFontAttributeName instead

Change-Id: I763efc498644ac234a712ebcefd07111b4444c98
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>
2016-08-24 20:44:39 +00:00
David Faure 3e453abc7d QMimeType: use default locale rather than system locale
This makes it possible for the application to control which language
is used by QMimeType::comment()

[ChangeLog][QtCore][QMimeType] QMimeType::comment() now uses the default locale
rather than system locale, so that applications can control which language
is being used.

Task-number: QTBUG-50776
Change-Id: I82623b7c488035a4164fadaf37ebcc79a9fd6173
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
2016-08-24 20:30:13 +00:00
David Faure 35b871b2b6 QStyleSheetStyle: don't call pixelMetric when not needed
fixupBorder does nothing when bd is null, i.e. hasBorder() returns false.

Change-Id: Ic88e3a793f32bd4ad25830ddad9dbd8100348279
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
2016-08-24 20:29:49 +00:00
Maurice Kalinowski 4d07042c70 winrt: Fix crash when clearing mimedata
Some autotests clear the clipboard by invoking setMimeData() with a null
QMimeData argument.

Change-Id: I4a9d3dfd41b2c52964e272fc1362162f47fd8cda
Reviewed-by: Oliver Wolff <oliver.wolff@qt.io>
2016-08-23 17:52:41 +00:00
Maurice Kalinowski f1808e96c5 Fix crash for dereferencing zero
Some targets do not support QFileSystemWatcher causing
QFileSystemModel::iconProvider() to return zero.

Change-Id: I3d2b7034b9fb805237c66a7dcea4457bfa41d46d
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
2016-08-23 17:52:36 +00:00
Raphael Kubo da Costa 680ec54a76 QMutex: Make freelist() return a real global static
Since Qt 5.6.0, some applications such as Kate (built with clang, libc++
and libcxxrt) on FreeBSD occasionally crash with the following error
message on exit:

    QMutex::lock(): sem_wait failure: Invalid argument
    [or pthread_cond_wait in the 5.6 branch]

Investigation by Gleb Popov, Thiago Macieira and Olivier Goffart has
shown that this is caused by the fact that QDBusConnectionManager is a
Q_GLOBAL_STATIC (so it will be destroyed with all the other
Q_GLOBAL_STATICs in the reverse order of construction). In the
Q_COMPILER_THREADSAFE_STATICS case, freelist() also returns a
function-level static that is constructed on first use, so it may be
destroyed earlier than the QDBusConnectionManager object, making it
impossible to lock a contended mutex.

We now make freelist() return a global static, so that it is always
destroyed after QDBusConnectionManager and other function-static
variables.

Change-Id: I210fa7c18dbdf2345863da49141b9a85cffdef52
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
2016-08-23 15:37:00 +00:00