diff options
Diffstat (limited to 'sys/dev/netmap/netmap_kern.h')
| -rw-r--r-- | sys/dev/netmap/netmap_kern.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/sys/dev/netmap/netmap_kern.h b/sys/dev/netmap/netmap_kern.h index 4578269e43a28..3f4b00d814f48 100644 --- a/sys/dev/netmap/netmap_kern.h +++ b/sys/dev/netmap/netmap_kern.h @@ -1169,6 +1169,15 @@ nm_kr_txempty(struct netmap_kring *kring) * rxsync_prologue */ #define nm_kr_rxempty(_k) nm_kr_txempty(_k) +/* True if the application needs to wait for more space on the ring + * (more received packets or more free tx slots). + * Only valid after *xsync_prologue. */ +static inline int +nm_kr_wouldblock(struct netmap_kring *kring) +{ + return kring->rcur == kring->nr_hwtail; +} + /* * protect against multiple threads using the same ring. * also check that the ring has not been stopped or locked |