forked from mirrors/linux
df65bba1dc
For code that needs the ultimate performance (it can inline the @cmp function too) or simply needs to avoid calling external functions for whatever reason, provide an __always_inline variant of bsearch(). [ tglx: Renamed to __inline_bsearch() as suggested by Andy ] Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com> Acked-by: Andy Lutomirski <luto@kernel.org> Link: https://lkml.kernel.org/r/20200505135313.624443814@linutronix.de
32 lines
624 B
C
32 lines
624 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_BSEARCH_H
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#define _LINUX_BSEARCH_H
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#include <linux/types.h>
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static __always_inline
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void *__inline_bsearch(const void *key, const void *base, size_t num, size_t size, cmp_func_t cmp)
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{
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const char *pivot;
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int result;
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while (num > 0) {
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pivot = base + (num >> 1) * size;
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result = cmp(key, pivot);
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if (result == 0)
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return (void *)pivot;
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if (result > 0) {
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base = pivot + size;
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num--;
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}
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num >>= 1;
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}
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return NULL;
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}
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extern void *bsearch(const void *key, const void *base, size_t num, size_t size, cmp_func_t cmp);
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#endif /* _LINUX_BSEARCH_H */
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