add back tu_fifo_discard_n() since it may be useful in the future.

1 files changed, 4 insertions, 0 deletions

diff --git a/src/common/tusb_fifo.h b/src/common/tusb_fifo.h
index f13c195e5..2e2a0db6f 100644
--- a/src/common/tusb_fifo.h
+++ b/src/common/tusb_fifo.h
@@ -205,6 +205,10 @@ TU_ATTR_ALWAYS_INLINE static inline uint16_t tu_fifo_read_n(tu_fifo_t *f, void *
   return tu_fifo_read_n_access_mode(f, buffer, n, TU_FIFO_INC_ADDR_RW8);
 }
 
+// discard first n items from fifo i.e advance read pointer by n with mutex
+// return number of discarded items
+uint16_t tu_fifo_discard_n(tu_fifo_t *f, uint16_t n);
+
 //--------------------------------------------------------------------+
 // Write API
 //--------------------------------------------------------------------+