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Likely/unlikely

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Imbus 2025-09-04 05:00:09 +02:00
parent 4ee23cd145
commit 129b29eaf3
1 changed files with 15 additions and 0 deletions
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15
kern/libkern/util.h Normal file
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#ifndef UTIL_H
#define UTIL_H
/*
* Give hints to the compiler for branch prediction optimization.
*/
#if defined(__clang__) || (defined(__GNUC__) && (__GNUC__ > 2))
#define likely(c) (__builtin_expect(!!(c), 1))
#define unlikely(c) (__builtin_expect(!!(c), 0))
#else
#define likely(c) (c)
#define unlikely(c) (c)
#endif
#endif // UTIL_H