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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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These defines were there to aid in the commercial
licensing scheme we used long ago, and are no longer needed.
Keep a QT_MODULE(x) define so other modules continue compiling.
Change-Id: I8fd76cd5270df8f14aee746b6cf32ebf7c23fec7
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>
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The code is now much simpler and much more complete. Now the bootstrap
atomics (which aren't atomic at all) contain the full set of
operations.
The only integer supported is int, but all others would work too.
Change-Id: Id99f07818f9da059c4ff02520f9cbf2d1a71a514
Reviewed-by: Bradley T. Hughes <bradley.hughes@nokia.com>
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.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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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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