New upstream version 17.11~rc4

[deb_dpdk.git] / lib / librte_kni / rte_kni_fifo.h

diff --git a/lib/librte_kni/rte_kni_fifo.h b/lib/librte_kni/rte_kni_fifo.h
index 8cb8587..6f2c3cb 100644 (file)
--- a/lib/librte_kni/rte_kni_fifo.h
+++ b/lib/librte_kni/rte_kni_fifo.h
@@ -73,7 +73,7 @@ kni_fifo_put(struct rte_kni_fifo *fifo, void **data, unsigned num)
 }
 
 /**
- * Get up to num elements from the fifo. Return the number actully read
+ * Get up to num elements from the fifo. Return the number actually read
  */
 static inline unsigned
 kni_fifo_get(struct rte_kni_fifo *fifo, void **data, unsigned num)
@@ -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);
+}