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Contact point is the Qt Project, and needs to be included for
all new files added to the repository.
Change-Id: Id0e7219e1d11a169f1a91439728cbda55ab29eeb
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>
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QBasicAtomicPointer is forward declared as a class, keep the actual
declaration of QBasicAtomicInteger and QBasicAtomicPointer as class with
all public members (qoldbasicatomic.h does the same).
src/corelib/thread/qbasicatomic.h:158:1: warning:
'QBasicAtomicPointer' defined as a struct template here but
previously declared as a class template [-Wmismatched-tags]
struct QBasicAtomicPointer
^
src/corelib/global/qglobal.h:1861:23: note: did you mean struct here?
template <typename T> class QBasicAtomicPointer;
^~~~~
struct
Change-Id: I38c59c29d7f796dde772e7f403bbf98b04571a08
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>
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The new implementation is API- and ABI-compatible with the old
implementation, provided that QBasicAtomicInt isn't used as an
argument in a function call or the return value: now, QBasicAtomicInt
is a typedef to QBasicAtomicInteger<int>.
The new design is based on CRTP: the QGenericAtomicOps template class
takes as a template parameter the derived class itself. This way, we
implement a "poor man's virtual" without a virtual table and
everything is inline.
QGenericAtomicOps implements most of the atomics code that is repeated
in many classes all over:
* Acquire semantics are obtained by placing an acquire barrier after
the Relaxed operation
* Release semantics are obtained by placing a release barrier before
the Relaxed operation
* Ordered semantics are obtained by placing an ordered barrier before
the Relaxed operation (either way would be fine)
* fetchAndStoreRelaxed and fetchAndAddRelaxed are implemented on top
of testAndSetRelaxed
* ref and deref are implemented on top of fetchAndAddRelaxed
It also adds load, loadAcquire, store and storeRelease: the default
implementations of loadAcquire and storeRelease operate on a volatile
variable and add barriers. There are no direct operators for accessing
the value.
Each architecture-specific implementation can override any of the
functions or the memory barrier functions. It must implement at least
the testAndSetRelaxed function.
In addition, by specialising one template class, the implementations
can allow QBasicAtomicInteger for additional types (of different
sizes). At the very least, int, unsigned and pointers must be supported.
Change-Id: I6da647e225bb330d3cfc16f84d0e7849dff85ec7
Reviewed-by: Bradley T. Hughes <bradley.hughes@nokia.com>
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Change-Id: I15df58f9dc29189419f8cbc0ce47bf11e9f17cf4
Reviewed-by: Bradley T. Hughes <bradley.hughes@nokia.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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Change-Id: I02f2c620296fcd91d4967d58767ea33fc4e1e7dc
Reviewed-by: Rohan McGovern <rohan.mcgovern@nokia.com>
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Now, users of QBasicAtomicInt and QBasicAtomicPointer must be sure to
use .load() and .store() to access the values.
Change-Id: I6b48ed175618baf387dd38d821bd50e6e93c082e
Reviewed-by: Bradley T. Hughes <bradley.hughes@nokia.com>
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>
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This should be replaced later with proper loadAcquire and storeRelease
functions in the architectures that require them. The code right now
is enough for x86, x86-64 and IA-64. It's probably not good for ARM
and MIPS.
Change-Id: Iaa28a18cad64772539662439c2c14690ec26940f
Reviewed-on: http://codereview.qt-project.org/5029
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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Updated version of LGPL and FDL licenseheaders.
Apply release phase licenseheaders for all source files.
Reviewed-by: Trust Me
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This is the beginning of revision history for this module. If you
want to look at revision history older than this, please refer to the
Qt Git wiki for how to use Git history grafting. At the time of
writing, this wiki is located here:
http://qt.gitorious.org/qt/pages/GitIntroductionWithQt
If you have already performed the grafting and you don't see any
history beyond this commit, try running "git log" with the "--follow"
argument.
Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12
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