| Commit message (Collapse) | Author | Age | Files | Lines |
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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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So I can use it in QSemaphore and provide a Windows implementation.
Change-Id: I6e9274c1e7444ad48c81fffd14dbc0a8e2201302
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
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$ git grep -we futexFlagSupport
src/corelib/thread/qmutex_linux.cpp:static QBasicAtomicInt futexFlagSupport = Q_BASIC_ATOMIC_INITIALIZER(-1);
The last user of this variable was removed in 9ef59b5.
Change-Id: I818a13a481ad25baa5ff7d389a737b8801adcfcc
Reviewed-by: David Faure <david.faure@kdab.com>
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
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It was added in 2.6.22. If we pass it to 2.6.21, we'll get -ENOSYS,
which is bad for QMutex. This fix simply defines it to 0 if the header
doesn't define it.
But as a consequence: if Qt is built with newer kernel headers, it won't
run on older versions. It's not likely that someone is still using Qt
5.7 on a 2.6.21 kernel (v2.6.21.7 was released on 2007-08-04).
Change-Id: Icb178bb113bb437c9b67fffd1451dd7bb964f0c8
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
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The flag was introduced in kernel 2.6.22, but we're already depending on
features added on 2.6.23 in qcore_unix_p.h (pipe2, dup3, O_CLOEXEC) and
2.6.27 in qnet_unix_p.h (accept4 and SOCK_CLOEXEC).
Change-Id: Id5480807d25e49e78b79ffff144a093c9e30cd96
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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Not that we require it, but since The Qt Company did it for all files
they have copyright, even if they haven't touched the file in years
(especially not in 2016), I'm doing the same.
Change-Id: I7a9e11d7b64a4cc78e24ffff142b4c9d53039846
Reviewed-by: Lars Knoll <lars.knoll@theqtcompany.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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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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- 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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Makes it possible for QElapsedTimer to be non-POD.
Change-Id: I5ffc59c7a93c187a4a814e6959f8383fa8d4cc44
Reviewed-by: Robin Burchell <robin+qt@viroteck.net>
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Change-Id: Ic804938fc352291d011800d21e549c10acac66fb
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
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The Linux futex implementation had a Q_ASSERT for positive values, but
the documentation says that negative values should be interpreted as
infinite (equal to lock()).
Test that too.
Change-Id: I2f96a502d672732781e88e49797756ca9a809121
Reviewed-by: David Faure (KDE) <faure@kde.org>
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
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The timeout is in millisecond. So we just need to divide by 1000 to get
the number of seconds
Regression introduced in f587e8f4fd670f11fa1e878c1015d7241033559a
Reported in the comments of QTBUG-24795
Change-Id: Id16e05e7d04d33605860926f7516d14cdefd6a36
Reviewed-by: Thiago Macieira <thiago.macieira@intel.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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We're not checking the result anyway, so use a simpler operation.
Change-Id: I8c2db35be86660b29d81dd97ce3e269de55a37df
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
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The first time we're going to sleep, the timeout should be exactly the
value that was passed by the user. We don't need to calculate the time
elapsed between start() and a few lines below.
Change-Id: I99c363b6f0ecfd07ad787b79b75e61771733c2b3
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
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Non-timed mutex locks are by far more common, so let's try not to
penalise the locking of those with code that won't get used that
often.
Change-Id: I37f56d6429836467fdec2e588c0fb22d914b5d75
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>
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Once we enter the inner loop, we never exit it except to return from
the lockInternal() function, so the rest is never executed again.
As a consequence of this, we won't try to fastTryLock() twice per
mutex. Therefore, for a non-recursive mutex, if lockInternal() is
entered, we'll definitely need to use futexes.
Change-Id: Ice617ed27449c1fbdc112a159a86cd0660125e13
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
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Dispatch to the recursive mutex functions from QMutex::lock, tryLock
and unlock.
This has the benefit that those using QBasicMutex will not go through
the testing for recursive mutexes. It simplifies a little the code for
those users.
For the users of QMutex, the code required to perform a lock does not
appear to change.
Change-Id: I0ca9965e012b283c30f1fab8e9f6d9b3288c2247
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>
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If the timeout wasn't zero, it can only become zero if we return from
futex() with a non-timeout reason but subsequently expires while we're
recalculating something.
A side effect is that we try-lock a non-recursive mutex exactly
once. Before this change, we'd fastTryLock() twice even with
timeout == 0.
Change-Id: I0af09fc2a84669a683a843fcf1513203b075dfb7
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
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A non-recursive mutex doesn't suddenly become recursive, so we don't
need to check it multiple times.
Change-Id: Id040254b6142d320a7bd3111491082ad09968404
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
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We could mark the cold path with __attribute__((cold)) (since GCC 4.3),
but quick tests locally indicate that the compiler is smart enough to
determine that by itself.
It will inline the hot path in _q_futex, which in turn is inlined in the
lockInternal and unlockInternal functions, whereas the cold path is kept
outside.
Change-Id: I8ae7d851d4f050498bfb491ba87d3e25453a14f8
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
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Unlocking a mutex can never throw an exception. That doesn't make
sense and our code should make sure it can't happen. Right now,
provided that the system-level functions don't throw, we don't either.
Locking a mutex cannot throw on Linux because we use futexes
directly. A non-recursive mutex is just a futex, whereas a recursive
mutex uses a mutex (a futex) to manage a lock count.
However, on other platforms, due to the freelist, there can be memory
allocation, which means it might throw std::bad_alloc. Not because of
the freelist itself (that uses malloc and will just crash if malloc
fails) but because of Q_GLOBAL_STATIC. In 5.1, the global static will
be noexcept provided the type's constructor is so too (it is, in this
case).
Change-Id: I4c562383f48de1be7827b9afb512d73eaf0792d5
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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Even though we really shouldn't, we can get away with using __NR_futex instead.
Done-with: Thiago Macieira <thiago.macieira@intel.com>
Change-Id: I0ba449b740acf2c78825f8093d1515a74f0bc9cd
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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The timeout given in milliseconds should be converted to a timespec
struct.
To separate the seconds and nanoseconds the milliseconds are first
multiplied to represent the whole value in an int64 variable.
The calculation is done on integers, so we get an overflow if the
milliseconds are bigger then 2148.
If we cast the given value to an int64 we can avoid this problem.
Fix the used cast.
Task-number: QTBUG-24795
Change-Id: I864ae227cf7dda16a6f30aa4db74acc49e20f6eb
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
Reviewed-by: Bradley T. Hughes <bradley.hughes@nokia.com>
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Futexes on Linux can be used across processes, for inter-process
synchronisation. The private flag tells the kernel that this futex is
not used with other processes, so it does not need to check for waiters
outside the current process.
This feature had been proposed in Merge Request 25, but was lost.
Change-Id: Ieafa8b8df0949bd9ae73709b3ec63f7709b0b2a6
Reviewed-by: João Abecasis <joao.abecasis@nokia.com>
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As in the past, to avoid rewriting various autotests that contain
line-number information, an extra blank line has been inserted at the
end of the license text to ensure that this commit does not change the
total number of lines in the license header.
Change-Id: I311e001373776812699d6efc045b5f742890c689
Reviewed-by: Rohan McGovern <rohan.mcgovern@nokia.com>
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Replace Nokia contact email address with Qt Project website.
Change-Id: I431bbbf76d7c27d8b502f87947675c116994c415
Reviewed-by: Rohan McGovern <rohan.mcgovern@nokia.com>
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Change-Id: I02f2c620296fcd91d4967d58767ea33fc4e1e7dc
Reviewed-by: Rohan McGovern <rohan.mcgovern@nokia.com>
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QMutexPrivate takes more memory than necessary, and also initialize
platform specific ressources.
Change-Id: I70be1b89b1c21499645785ae47693a6b2514e28b
Reviewed-by: Bradley T. Hughes <bradley.hughes@nokia.com>
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Because we use d as a local variable.
We used this->d to refer it, but this can be confusing to have twice the same
name
Change-Id: I570aa5f444ada358eb456d6b3d9b8bfa60b10bbf
Reviewed-by: Bradley T. Hughes <bradley.hughes@nokia.com>
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Most of these changes are search-and-replace of d->ref ==, d->ref !=
and d->ref =.
The QBasicAtomicPointer in QObjectPrivate::Connection didn't need to
be basic, so I made it QAtomicPointer.
Change-Id: Ie3271abd1728af599f9ab17c6f4868e475f17bb6
Reviewed-on: http://codereview.qt-project.org/5030
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Bradley T. Hughes <bradley.hughes@nokia.com>
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>
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And added a POD QBasicMutex. (QBasicMutex* can safely be
static_cast'ed to QMutex*)
The d pointer is not anymore always a QMutexPrivate.
If d == 0x0: the mutex is unlocked
If d == 0x1: the mutex is locked, uncontended
On linux:
if d == 0x3: the mutex is locked contended, waiting on a futex
If d is a pointer, it is a recursive mutex.
On non-linux platforms:
When a thread tries to lock a mutex for which d == 0x1, it will try to
assing it a QMutexPrivated (allocated from a freelist) in order to wait
for it.
Change-Id: Ie1431cd9402a576fdd9a693cfd747166eebf5622
Reviewed-by: Bradley T. Hughes <bradley.hughes@nokia.com>
Reviewed-on: http://codereview.qt.nokia.com/2116
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Olivier Goffart <olivier.goffart@nokia.com>
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