Willy Tarreau 9824f8c890 MINOR: buffer: add br_single() to check if a buffer ring has more than one buf
It's cheaper and cleaner than using br_count()==1 given that it just compares
two indexes, and that a ring having a single buffer is in a special case where
it is between empty and used up-to-1. In other words it's not congested.
2023-03-16 18:45:46 +01:00
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