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@ -133,39 +133,6 @@
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#endif
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#endif
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/**
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* The KDE_ISLIKELY macro tags a boolean expression as likely to evaluate to
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* 'true'. When used in an if ( ) statement, it gives a hint to the compiler
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* that the following codeblock is likely to get executed. Providing this
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* information helps the compiler to optimize the code for better performance.
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* Using the macro has an insignificant code size or runtime memory footprint impact.
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* The code semantics is not affected.
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*
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* \note
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* Providing wrong information ( like marking a condition that almost never
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* passes as 'likely' ) will cause a significant runtime slowdown. Therefore only
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* use it for cases where you can be sure about the odds of the expression to pass
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* in all cases ( independent from e.g. user configuration ).
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*
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* \par
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* The KDE_ISUNLIKELY macro tags an expression as unlikely evaluating to 'true'.
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*
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* \note
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* Do NOT use ( !KDE_ISLIKELY(foo) ) as an replacement for KDE_ISUNLIKELY !
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*
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* \code
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* if ( KDE_ISUNLIKELY( testsomething() ) )
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* abort(); // assume its unlikely that the application aborts
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* \endcode
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*/
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#if __GNUC__ - 0 >= 3
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# define KDE_ISLIKELY( x ) __builtin_expect(!!(x),1)
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# define KDE_ISUNLIKELY( x ) __builtin_expect(!!(x),0)
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#else
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# define KDE_ISLIKELY( x ) ( x )
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# define KDE_ISUNLIKELY( x ) ( x )
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#endif
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/**
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* This macro, and it's friends going up to 10 reserve a fixed number of virtual
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* functions in a class. Because adding virtual functions to a class changes the
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