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-rw-r--r--lib/librte_kni/rte_kni_fifo.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/lib/librte_kni/rte_kni_fifo.h b/lib/librte_kni/rte_kni_fifo.h
index 8cb85873..c7cd5c26 100644
--- a/lib/librte_kni/rte_kni_fifo.h
+++ b/lib/librte_kni/rte_kni_fifo.h
@@ -91,3 +91,12 @@ kni_fifo_get(struct rte_kni_fifo *fifo, void **data, unsigned num)
fifo->read = new_read;
return i;
}
+
+/**
+ * Get the num of elements in the fifo
+ */
+static inline uint32_t
+kni_fifo_count(struct rte_kni_fifo *fifo)
+{
+ return (fifo->len + fifo->write - fifo->read) & (fifo->len - 1);
+}