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* Update copyright headersJani Heikkinen2015-02-111-7/+7
| | | | | | | | | | | | | | | | | | 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 Outdated header.LGPL removed (use header.LGPL21 instead) Old header.LGPL3 renamed to header.LGPL3-COMM to match actual licensing combination.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>
* Update license headers and add new license filesMatti Paaso2014-09-241-19/+11
| | | | | | | | | - Renamed LICENSE.LGPL to LICENSE.LGPLv21 - Added LICENSE.LGPLv3 - Removed LICENSE.GPL Change-Id: Iec3406e3eb3f133be549092015cefe33d259a3f2 Reviewed-by: Iikka Eklund <iikka.eklund@digia.com>
* Add a testAndSet overload to the atomics that returns the current valueThiago Macieira2014-02-161-0/+32
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is extremely useful, since the most common action after a failed compare-and-swap is to loop around, trying again with the current value as found in memory. Code currently written as: do { Type value = atomic.load(); ... } while (!atomic.testAndSetRelaxed(value, desired)); Becomes: Type value = atomic.load(); do { ... } while (!atomic.testAndSetRelaxed(value, desired, value)); In most CPU architectures, the value that was found in memory is known to the compare-and-swap code, so this is more efficient than the previous code. In architectures where the value is not known, the new code is no worse than before. The implementation sometimes modified an existing function, sometimes it added a new one, depending on whether more registers were needed in the assembly (like ARMv6-7), the code became more complex (ARMv5), the optimizer failed (C++11), or it was just plain equivalent (MIPS). Change-Id: I7d6d200ea9746ec8978a0c1e1969dbc3580b9285 Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com> Reviewed-by: Lars Knoll <lars.knoll@digia.com> Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
* Replace the type-based QAtomicIntegerTraits with a size-based oneThiago Macieira2014-01-301-12/+3
| | | | | | | | This simplifies the code a lot and avoids silly mistakes where a specific integer type is missing (such as char16_t). Change-Id: Id91dfd1919e783e0a9af7bfa093ca560a01b22d1 Reviewed-by: Lars Knoll <lars.knoll@digia.com>
* Centralize support for QBasicAtomic for ints and longsThiago Macieira2014-01-301-6/+0
| | | | | | | No need to redefine everywhere, since they're required to be supported. Change-Id: I2bdbbd0b0c44871e3bd0edcf0289fc58dd50ff31 Reviewed-by: Lars Knoll <lars.knoll@digia.com>
* Disable 64-bit atomics on 32-bit x86Thiago Macieira2013-12-071-1/+2
| | | | | | | | | | | | At least with GCC, the use of cmpxchg8b in inline assembly is unreliable. The instruction requires 5 registers to be used and sometimes GCC complains that it runs out of them. qatomic_x86.h:424:33: error: can’t find a register in class ‘GENERAL_REGS’ while reloading ‘asm’ qatomic_x86.h:424:33: error: ‘asm’ operand has impossible constraints Change-Id: Ie5414f3bccc6e559c7eec93beabe8663ab40271f Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
* Mark all qtbase headers that aren't cleanThiago Macieira2013-03-031-0/+1
| | | | | | | | | | | | | | | | QtCore has a few headers that, though public, aren't meant to be included directly. Those are the atomic headers, the three _impl.h headers and qt_windows.h. QtGui includes two OpenGL headers that don't compile on their own. Other libraries should not have headers like that (but they do, something we need to fix eventually). Change-Id: I55e4eb057748f47df927ee618f9409acbc189cc1 Reviewed-by: Sean Harmer <sean.harmer@kdab.com> Reviewed-by: Gunnar Sletta <gunnar.sletta@digia.com> Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
* Remove QT_{BEGIN,END}_HEADER macro usageSergio Ahumada2013-01-291-6/+0
| | | | | | | | | | | The macro was made empty in ba3dc5f3b56d1fab6fe37fe7ae08096d7dc68bcb and is no longer necessary or used. Discussed-on: http://lists.qt-project.org/pipermail/development/2013-January/009284.html Change-Id: Id2bb2e2cabde059305d4af5f12593344ba30f001 Reviewed-by: Laszlo Papp <lpapp@kde.org> Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@digia.com> Reviewed-by: hjk <hjk121@nokiamail.com>
* Update copyright year in Digia's license headersSergio Ahumada2013-01-181-1/+1
| | | | | Change-Id: Ic804938fc352291d011800d21e549c10acac66fb Reviewed-by: Lars Knoll <lars.knoll@digia.com>
* Change copyrights from Nokia to DigiaIikka Eklund2012-09-221-24/+24
| | | | | | | | 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>
* Enable QAtomicInteger for char16_t and char32_tThiago Macieira2012-08-181-0/+6
| | | | | | | | | | | Those are regular, integer types, of 16- and 32-bit width, respectively. C++11's std::atomic supports them, so we should too. C++11 also supports wchar_t, but since that type's size can change, I don't feel like support for it in Qt is pressing. Change-Id: I945b641c91a8a98be82715f878c382dee58ac98b Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
* Add Q_DECL_CONSTEXPR to the isXXX functions in the new atomics.Thiago Macieira2012-08-181-10/+10
| | | | | | | | | This allows one to write code that depends on these values at compile-time. Change-Id: I7d78524ed9c70d4141360496d1d764dcbfa92e62 Reviewed-by: Marc Mutz <marc.mutz@kdab.com> Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
* Mark all atomic functions as Q_DECL_NOTHROWThiago Macieira2012-08-091-30/+30
| | | | | | | | | | | | | | | | | | | | | | | | | Actually, only the "new" atomics are marked. The old implementation, based on qoldbasicatomic.h is unchanged, but should still work without a problem. The following configurations were tested and do work: - x86 64-bit - x86 32-bit - generic GCC - generic C++11 std::atomic - bootstrap - ARMv6 and 7 - MIPS - MSVC 2010 32-bit - MSVC 2010 64-bit The only two configurations untested are IA-64 and ARMv5. Except for MSVC, all configurations were tested with GCC 4.6 (MIPS and ARM) and 4.7 (x86 and generics). Change-Id: Iecbfeacd9d20b535453e91335165e9a221e0b47e Reviewed-by: Marc Mutz <marc.mutz@kdab.com> Reviewed-by: Lars Knoll <lars.knoll@nokia.com>
* Unify the atomic implementation for x86 architecturesThiago Macieira2012-03-281-33/+96
| | | | | | | | | | | It's almost exactly the same code in both files, so let's have one file only. That means we need an #ifdef for the special case of 64-bit types on i386. Also take the opportunity to add a comment explaining how this works. Change-Id: I50d274fa026806ae511b1045aa8a5c25daaa0edc Reviewed-by: Bradley T. Hughes <bradley.hughes@nokia.com>
* Rename qatomic_x86_64.h to qatomic_x86.hThiago Macieira2012-03-281-0/+359
This is the first step in merging the i386 and x86-64 architectures. The next commit will bring i386 support into qatomic_x86.h. Change-Id: I24105ea70f3fc29b3fb779a70053f99117440573 Reviewed-by: Bradley T. Hughes <bradley.hughes@nokia.com>
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