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seqlock: add predict_xxx to increase performance

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This commit added predict_xxx to increase performance.

Signed-off-by: hujun5 <hujun5@xiaomi.com>
This commit is contained in:
hujun5
2025-09-13 17:58:35 +08:00
committed by Alan C. Assis
parent dbc6bedff9
commit 9e3b852d4b
1 changed files with 2 additions and 2 deletions
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include/nuttx/seqlock.h
+2 -2
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@@ -102,7 +102,7 @@ unsigned int read_seqbegin(FAR const seqcount_t *s)
{ {
unsigned int seq; unsigned int seq;
while ((seq = s->sequence) & 1); while (predict_false((seq = s->sequence) & 1));
#ifdef CONFIG_SMP #ifdef CONFIG_SMP
UP_DMB(); UP_DMB();
@@ -137,7 +137,7 @@ unsigned int read_seqretry(FAR const seqcount_t *s, unsigned int start)
#endif #endif
seq = s->sequence; seq = s->sequence;
return seq != start; return predict_false(seq != start);
} }
/**************************************************************************** /****************************************************************************