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Thiago Macieira dba6067670 Optimize QSharedPointer::getAndRef with the three-operand testAndSet 
Originally QAtomicPointer didn't have the three-operand version,
resulting in code like:
  if (!atomic.testAndSetXxx(expected, newvalue))
       expected = atomic.load();

The three-operand version gives us the current value of the atomic in
case the test failed and it's free in all architectures, unlike the
extra load.

I have to use testAndSetOrdered here because I need the failing load to
use the Acquire memory order, even though that has an extra Acquire for
the successful case we don't need. QAtomicPointer does not have
testAndSetReleaseAcquire.

Change-Id: I1bd327aeaf73421a8ec5fffd1560fe30d3bfd9b8
Reviewed-by: Romain Pokrzywka <romain.pokrzywka@gmail.com>
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@qt.io>
 		2018-11-28 04:37:10 +00:00
..
UNICODE_LICENSE.txt Document use of Unicode Character Database 2018-02-15 08:02:41 +00:00
qalgorithms.h MSVC: add support for 64-bit POPCNT on 32-bit machines 2018-08-16 16:33:38 +00:00
qalgorithms.qdoc qdoc: Fix \fn commands for QCborxxx member functions 2018-08-07 05:43:59 +00:00
qarraydata.cpp Add QArrayData::reallocateUnaligned for QString and QByteArray 2016-09-07 14:35:51 +00:00
qarraydata.h implement non-member operator+ for iterators 2018-03-06 22:04:37 +00:00
qarraydataops.h Fix build with GCC 8: memset/memcpy/memmove of non-trivials 2018-05-09 05:43:26 +00:00
qarraydatapointer.h Move Q_REQUIRED_RESULT to its correct position 2017-04-20 05:40:59 +00:00
qbitarray.cpp Fix some qdoc-warnings for 5.11 2018-02-21 16:10:26 +00:00
qbitarray.h QBitArray: add manipulate a dense bit array directly 2018-01-28 22:15:05 +00:00
qbytearray.cpp Merge remote-tracking branch 'origin/5.11' into 5.12 2018-11-27 01:00:09 +01:00
qbytearray.h QByteArray: add compare() with case sensitivity options 2018-06-22 20:12:41 +00:00
qbytearray_p.h Replace custom type traits with std one's 2016-11-08 15:31:17 +00:00
qbytearraylist.cpp
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qbytearraylist.h Replace Q_NULLPTR with nullptr where possible 2017-09-19 11:53:55 +00:00
qbytearraymatcher.cpp Doc: Move literal code block to a separate file 2018-10-15 10:55:18 +00:00
qbytearraymatcher.h QtCore: Raise minimum supported MSVC version to 2015 2018-01-08 04:52:43 +00:00
qbytedata_p.h Make sure all private headers in Qt Core include qglobal_p.h 2016-06-25 08:01:04 +00:00
qcache.h
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qcache.qdoc Add template text to \fn commands in cache classes 2017-12-01 19:35:53 +00:00
qchar.cpp QtCore: Raise minimum supported MSVC version to 2015 2018-01-08 04:52:43 +00:00
qchar.h Fix MSVC builds with /Zc:wchar_t- 2018-07-25 09:44:36 +00:00
qcollator.cpp Supply locale to QCollatorPrivate via its constructor 2018-08-13 14:15:44 +00:00
qcollator.h Replace Q_NULLPTR with nullptr where possible 2017-09-19 11:53:55 +00:00
qcollator_icu.cpp Use suitable abstraction for the null value of CollatorType 2018-08-13 14:15:51 +00:00
qcollator_macx.cpp macOS/iOS: Correctly ignore punctuation in QCollator 2017-06-13 04:08:56 +00:00
qcollator_p.h Ignore a smaller type in the posix form of QCollator 2018-08-13 14:15:59 +00:00
qcollator_posix.cpp QCollatorSortKey: add some std::move 2017-02-13 08:42:46 +00:00
qcollator_win.cpp Qt Core: Remove code for Windows < 7 2017-10-05 08:44:48 +00:00
qcommandlineoption.cpp Merge remote-tracking branch 'origin/5.7' into dev 2016-08-09 17:59:51 +02:00
qcommandlineoption.h QCommandLineOption: Remove excess close parenthesis from a warning 2016-11-30 08:50:17 +00:00
qcommandlineparser.cpp QCommandLineParser: Ensure that an option text ends with a newline 2018-09-28 22:01:05 +00:00
qcommandlineparser.h Add configure feature for QCommandLineParser 2016-10-11 14:20:24 +00:00
qcontainerfwd.h
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qcontiguouscache.cpp Doc: Move literal code block to a separate file 2018-10-15 10:55:18 +00:00
qcontiguouscache.h Fix leak in QContiguousCache::setCapacity 2018-10-30 10:08:47 +00:00
qcryptographichash.cpp QCryptographicHash: Add a static method to retrieve hash length 2018-04-10 12:17:43 +00:00
qcryptographichash.h QCryptographicHash: Add a static method to retrieve hash length 2018-04-10 12:17:43 +00:00
qdatetime.cpp Merge remote-tracking branch 'origin/5.11' into 5.12 2018-09-27 11:08:55 +02:00
qdatetime.h Modernize the "datestring" feature 2018-09-24 17:12:29 +00:00
qdatetime_p.h Remove two unused static methods of QDateTimePrivate 2017-01-12 16:42:21 +00:00
qdatetimeparser.cpp QDateTimeParser: avoid using an invalid hour by default 2018-10-02 13:49:45 +00:00
qdatetimeparser_p.h Modernize the "datestring" feature 2018-09-24 17:12:29 +00:00
qdoublescanprint_p.h
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qeasingcurve.cpp Doc: Fix QEasingCurve code snippets 2018-09-25 16:39:01 +00:00
qeasingcurve.h Replace Q_NULLPTR with nullptr where possible 2017-09-19 11:53:55 +00:00
qfreelist.cpp
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qfreelist_p.h Fix build with MSVC 2015 Update 2 if constexpr is enabled 2017-07-03 16:01:07 +00:00
qharfbuzz.cpp Use QT_CONFIG(library) instead of QT_NO_LIBRARY 2017-03-06 11:27:20 +00:00
qharfbuzz_p.h Make sure all private headers in Qt Core include qglobal_p.h 2016-06-25 08:01:04 +00:00
qhash.cpp Doc: Move literal code block to a separate file 2018-10-15 10:55:18 +00:00
qhash.h implement non-member operator+ for iterators 2018-03-06 22:04:37 +00:00
qhashfunctions.h JSON: Add qHash functions for JSON and CBOR types 2018-08-27 13:06:19 +00:00
qiterator.h Doc: move QKeyValueIterator documentation to the right file 2017-10-11 05:24:49 +00:00
qiterator.qdoc doc: Remove duplicate qdoc comments in qiterator.qdoc 2018-01-04 12:49:10 +00:00
qline.cpp Doc: fix formatting error in QLineF 2018-11-11 22:09:00 +00:00
qline.h Move Q_REQUIRED_RESULT to its correct position 2017-04-20 05:40:59 +00:00
qlinkedlist.cpp Add template text to \fn commands in container classes 2017-12-01 10:48:22 +00:00
qlinkedlist.h implement non-member operator+ for iterators 2018-03-06 22:04:37 +00:00
qlist.cpp Doc: Advocate use of std::initializer_list constructor in Q[String]List 2018-04-23 06:27:40 +00:00
qlist.h Fix UB (invalid pointer comparison) in QList, QVector, QVLA 2018-10-08 16:18:53 +00:00
qlocale.cpp Merge remote-tracking branch 'origin/5.11' into 5.12 2018-11-27 01:00:09 +01:00
qlocale.h Merge remote-tracking branch 'origin/5.11' into 5.12 2018-09-27 11:08:55 +02:00
qlocale.qdoc Update to CLDR v34 2018-11-02 12:40:46 +00:00
qlocale_data_p.h Update to CLDR v34 2018-11-02 12:40:46 +00:00
qlocale_icu.cpp Use QT_CONFIG(library) instead of QT_NO_LIBRARY 2017-03-06 11:27:20 +00:00
qlocale_mac.mm QLocale: add toString(Q(Date|QTime)+, QStringView format) overloads 2017-04-12 11:12:04 +00:00
qlocale_p.h Merge remote-tracking branch 'origin/5.11' into 5.12 2018-11-27 01:00:09 +01:00
qlocale_tools.cpp Merge remote-tracking branch 'origin/5.11' into 5.12 2018-11-27 01:00:09 +01:00
qlocale_tools_p.h Add "qt_" prefix to asciiToDouble and doubleToAscii functions 2018-08-03 20:26:48 +00:00
qlocale_unix.cpp Suppress warnings about deprecated QString constructor 2018-05-30 03:57:32 +00:00
qlocale_win.cpp Windows code: Fix to prefer ranged-for, as clang-tidy advises 2018-09-02 16:05:39 +00:00
qmakearray_p.h corelib/tools: add qMakeArray() API 2018-07-25 06:57:44 +00:00
qmap.cpp Doc: Fix various documentation warnings 2018-11-06 12:43:26 +00:00
qmap.h implement non-member operator+ for iterators 2018-03-06 22:04:37 +00:00
qmargins.cpp
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qmargins.h
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qmessageauthenticationcode.cpp Restore compatibility with pre-5.9 Keccak calculation 2017-09-21 03:21:58 +00:00
qmessageauthenticationcode.h
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qpair.h
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qpair.qdoc Add template text to \fn commands in QPair 2017-12-02 09:37:22 +00:00
qpoint.cpp
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qpoint.h Fix regression in QPointF::operator== 2018-07-09 15:38:31 +00:00
qqueue.cpp doc: Correct remaining qdoc warnings in qqueue.cpp 2018-01-04 12:49:36 +00:00
qqueue.h
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qrect.cpp Doc: Move literal code block to a separate file 2018-10-15 10:55:18 +00:00
qrect.h Improve rounding of QRect::toRect 2017-06-26 21:35:38 +00:00
qrefcount.cpp
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qrefcount.h Merge remote-tracking branch 'origin/5.6' into 5.7 2016-05-19 12:55:27 +02:00
qregexp.cpp Protect all accesses to the global engine cache by a mutex 2018-04-25 18:50:06 +00:00
qregexp.h
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qregularexpression.cpp Doc: Fix various documentation warnings 2018-11-06 12:43:26 +00:00
qregularexpression.h Implement exact match expression builder for QRegularExpression 2018-08-19 11:38:26 +00:00
qringbuffer.cpp Simplify QRingBuffer::peek() 2018-02-22 18:34:30 +00:00
qringbuffer_p.h QRingBuffer: replace some checks with asserts 2018-01-10 20:21:31 +00:00
qscopedpointer.cpp Doc: improve QScopedPointer::reset() documentation 2018-03-08 07:40:26 +00:00
qscopedpointer.h Replace Q_NULLPTR with nullptr where possible 2017-09-19 11:53:55 +00:00
qscopedpointer_p.h Make sure all private headers in Qt Core include qglobal_p.h 2016-06-25 08:01:04 +00:00
qscopedvaluerollback.cpp doc: Correct remaining qdoc warnings in qscopedvaluerollback.cpp 2018-01-05 16:03:47 +00:00
qscopedvaluerollback.h
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qscopeguard.h Introduce QScopeGuard 2018-07-21 17:47:35 +00:00
qscopeguard.qdoc Doc: Tie the QScopeGuard documentation to a class 2018-11-06 12:44:28 +00:00
qset.h implement non-member operator+ for iterators 2018-03-06 22:04:37 +00:00
qset.qdoc Add template text to \fn commands in container classes 2017-12-01 10:48:22 +00:00
qshareddata.cpp Doc: Fix various documentation warnings 2018-11-06 12:43:26 +00:00
qshareddata.h QCborValue: implement move semantics for QCbor{Array,Map} constructors 2018-07-04 03:04:26 +00:00
qsharedpointer.cpp Optimize QSharedPointer::getAndRef with the three-operand testAndSet 2018-11-28 04:37:10 +00:00
qsharedpointer.h QSharedPointer: add get() for STL compatibility 2017-09-12 14:05:21 +00:00
qsharedpointer_impl.h Add support for QSharedPointer<cv qualified>::create() 2018-05-17 15:08:04 +00:00
qsimd.cpp WebAssembly for QtBase 2018-08-30 06:48:33 +00:00
qsimd_p.h SIMD: Add a haswell sub-architecture selection to our support 2018-07-09 00:18:24 +00:00
qsimd_x86.cpp SIMD: Refactor the constants to be actual bit values 2018-06-25 18:49:28 +00:00
qsimd_x86_p.h SIMD: Change the way we declare constants for x86 2018-07-09 00:18:30 +00:00
qsize.cpp
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qsize.h Move Q_REQUIRED_RESULT to its correct position 2017-04-20 05:40:59 +00:00
qstack.cpp doc: Correct remaining qdoc warnings in qstack.cpp 2018-01-05 20:21:49 +00:00
qstack.h
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qstring.cpp Merge remote-tracking branch 'origin/5.11' into 5.12 2018-11-27 01:00:09 +01:00
qstring.h Add QString::compare(QStringView, CaseSensitivity) 2018-09-03 08:55:45 +00:00
qstring_compat.cpp QString(Ref): make toLatin1()/toLocal8Bit() null handling consistent 2017-02-15 20:12:36 +00:00
qstring_mips_dsp_asm.S
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qstringalgorithms.h QUrl: Add qustrchr() and use it to speed up the fast URL full decoding 2018-08-03 20:26:56 +00:00
qstringalgorithms_p.h QStringAlgorithms/private: prefer to trim whitespace from the end 2017-05-04 07:20:55 +00:00
qstringbuilder.cpp Modernize the "textcodec" feature 2018-11-07 13:19:54 +00:00
qstringbuilder.h QStringBuilder: add support for QStringView 2018-01-08 09:41:43 +00:00
qstringiterator.qdoc Replace LGPL licenses in .qdoc files with FDL 2018-06-28 10:22:06 +00:00
qstringiterator_p.h Improve readability of code that uses the Qt signed size type 2017-11-28 18:41:40 +00:00
qstringlist.cpp QStringList: restore binary compatibility with Qt 5.11 2018-09-10 19:20:15 +00:00
qstringlist.h QStringList: restore binary compatibility with Qt 5.11 2018-09-10 19:20:15 +00:00
qstringliteral.h QStringLiteral: remove the wchar_t fallback for Windows 2018-08-07 21:50:48 +00:00
qstringmatcher.cpp QStringMatcher: fix setCaseSensitivity() on a non-QString-backed matcher 2017-02-07 16:31:00 +00:00
qstringmatcher.h
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qstringview.cpp Doc: Move literal code block to a separate file 2018-10-15 10:55:18 +00:00
qstringview.h QStringView: Add compare() member function 2018-07-13 13:32:34 +00:00
qt_attribution.json Clean up and update Unicode character data 3rd-party infrastructure 2018-11-11 22:09:27 +00:00
qtextboundaryfinder.cpp
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qtextboundaryfinder.h Replace Q_NULLPTR with nullptr where possible 2017-09-19 11:53:55 +00:00
qtimeline.cpp doc: Add missing return types to \fn commands, fix mis-specified ones 2018-01-18 06:32:32 +00:00
qtimeline.h Replace Q_NULLPTR with nullptr where possible 2017-09-19 11:53:55 +00:00
qtimezone.cpp Doc: Fix various documentation warnings 2018-11-06 12:43:26 +00:00
qtimezone.h QTimeZone: make UTC offset range available for other code to reuse 2017-06-13 11:27:57 +00:00
qtimezoneprivate.cpp Merge remote-tracking branch 'origin/5.11' into 5.12 2018-10-08 10:00:49 +02:00
qtimezoneprivate_android.cpp Tidy-up after recent change: combine declaration with initializer 2018-07-03 11:23:43 +00:00
qtimezoneprivate_data_p.h Made the "do not edit generated code" notice clearer 2017-06-08 13:37:21 +00:00
qtimezoneprivate_icu.cpp Merge remote-tracking branch 'origin/5.9' into dev 2017-04-04 18:09:33 +02:00
qtimezoneprivate_mac.mm [macOS] Fix lower bound when searching for previous transitions 2018-08-14 15:02:08 +00:00
qtimezoneprivate_p.h Speed up QTimeZone::isTimeZoneIdAvailable by a factor 43 2018-04-23 06:48:12 +00:00
qtimezoneprivate_tz.cpp Use std::partition_point for faster searches among transitions 2018-08-20 09:27:27 +00:00
qtimezoneprivate_win.cpp Windows code: Fix clang-tidy warnings about else after jumps 2018-09-02 12:41:07 +00:00
qtools_p.h Make sure all private headers in Qt Core include qglobal_p.h 2016-06-25 08:01:04 +00:00
qunicodetables.cpp Update Text segmentation and line break data to Unicode 10.0 2018-01-03 07:47:26 +00:00
qunicodetables_p.h WebAssembly for QtBase 2018-08-30 06:48:33 +00:00
qunicodetools.cpp Update Text segmentation and line break data to Unicode 10.0 2018-01-03 07:47:26 +00:00
qunicodetools_p.h Make sure all private headers in Qt Core include qglobal_p.h 2016-06-25 08:01:04 +00:00
qvarlengtharray.h Fix UB (invalid pointer comparison) in QList, QVector, QVLA 2018-10-08 16:18:53 +00:00
qvarlengtharray.qdoc Add missing rvalue overloads of operator+=() and operator<<() 2018-03-07 18:36:40 +00:00
qvector.h Fix UB (invalid pointer comparison) in QList, QVector, QVLA 2018-10-08 16:18:53 +00:00
qvector.qdoc Replace LGPL licenses in .qdoc files with FDL 2018-06-28 10:22:06 +00:00
qvector_msvc.cpp
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qversionnumber.cpp Merge remote-tracking branch 'origin/5.9' into 5.10 2017-11-09 11:47:57 +01:00
qversionnumber.h Replace Q_NULLPTR with nullptr where possible 2017-09-19 11:53:55 +00:00
qvsnprintf.cpp doc: Fix all remaining "Cannot tie" errors in QtBase 2017-01-06 07:04:12 +00:00
tools.pri WebAssembly for QtBase 2018-08-30 06:48:33 +00:00