interface/io/ring.h

166  * requestor (front end) never has more than RING_SIZE()-1
197 #define RING_SIZE(_r)                                                   \
202     (RING_SIZE(_r) - ((_r)->req_prod_pvt - (_r)->rsp_cons))
217     unsigned int rsp = RING_SIZE(_r) -                                  \
225       (RING_SIZE(_r) - ((_r)->req_cons - (_r)->rsp_prod_pvt))) ?        \
227      (RING_SIZE(_r) - ((_r)->req_cons - (_r)->rsp_prod_pvt)))
232     (&((_r)->sring->ring[((_idx) & (RING_SIZE(_r) - 1))].req))
249     (&((_r)->sring->ring[((_idx) & (RING_SIZE(_r) - 1))].rsp))
253     (((_cons) - (_r)->rsp_prod_pvt) >= RING_SIZE(_r))
257     (((_prod) - (_r)->rsp_prod_pvt) > RING_SIZE(_r))