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eal: improve likely and unlikely macros

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A warning is issued when using an argument to likely() or unlikely()
builtins which is evaluated to a pointer value, as __builtin_expect()
expects a 'long int' type for its first argument. With this fix
a pointer value is converted to an integer with the value of 0 or 1.

Signed-off-by: Aleksey Baulin <aleksey.baulin@gmail.com>
This commit is contained in:
Aleksey Baulin 2017-11-20 01:16:04 +03:00 committed by Thomas Monjalon
parent cd7fc8a84b
commit 7a89f8eedc
1 changed files with 2 additions and 2 deletions
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4
lib/librte_eal/common/include/rte_branch_prediction.h
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@ -21,7 +21,7 @@
* *
*/ */
#ifndef likely #ifndef likely
#define likely(x) __builtin_expect((x),1) #define likely(x) __builtin_expect(!!(x), 1)
#endif /* likely */ #endif /* likely */
/** /**
@ -35,7 +35,7 @@
* *
*/ */
#ifndef unlikely #ifndef unlikely
#define unlikely(x) __builtin_expect((x),0) #define unlikely(x) __builtin_expect(!!(x), 0)
#endif /* unlikely */ #endif /* unlikely */
#endif /* _RTE_BRANCH_PREDICTION_H_ */ #endif /* _RTE_BRANCH_PREDICTION_H_ */