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Diffstat (limited to 'tdecore/kdemacros.h.in')
| -rw-r--r-- | tdecore/kdemacros.h.in | 33 |
1 files changed, 0 insertions, 33 deletions
diff --git a/tdecore/kdemacros.h.in b/tdecore/kdemacros.h.in index a0d70a2fc..b572ca212 100644 --- a/tdecore/kdemacros.h.in +++ b/tdecore/kdemacros.h.in @@ -133,39 +133,6 @@ #endif /** - * The KDE_ISLIKELY macro tags a boolean expression as likely to evaluate to - * 'true'. When used in an if ( ) statement, it gives a hint to the compiler - * that the following codeblock is likely to get executed. Providing this - * information helps the compiler to optimize the code for better performance. - * Using the macro has an insignificant code size or runtime memory footprint impact. - * The code semantics is not affected. - * - * \note - * Providing wrong information ( like marking a condition that almost never - * passes as 'likely' ) will cause a significant runtime slowdown. Therefore only - * use it for cases where you can be sure about the odds of the expression to pass - * in all cases ( independent from e.g. user configuration ). - * - * \par - * The KDE_ISUNLIKELY macro tags an expression as unlikely evaluating to 'true'. - * - * \note - * Do NOT use ( !KDE_ISLIKELY(foo) ) as an replacement for KDE_ISUNLIKELY ! - * - * \code - * if ( KDE_ISUNLIKELY( testsomething() ) ) - * abort(); // assume its unlikely that the application aborts - * \endcode - */ -#if __GNUC__ - 0 >= 3 -# define KDE_ISLIKELY( x ) __builtin_expect(!!(x),1) -# define KDE_ISUNLIKELY( x ) __builtin_expect(!!(x),0) -#else -# define KDE_ISLIKELY( x ) ( x ) -# define KDE_ISUNLIKELY( x ) ( x ) -#endif - -/** * This macro, and it's friends going up to 10 reserve a fixed number of virtual * functions in a class. Because adding virtual functions to a class changes the * size of the vtable, adding virtual functions to a class breaks binary |