176     int diff;  in semaGetReadBoxAvailLen()  local
179         diff = mxcSemaBox1->writeLocation - mxcSemaBox1->readLocation;  in semaGetReadBoxAvailLen()
181         diff = mxcSemaBox0->writeLocation - mxcSemaBox0->readLocation;  in semaGetReadBoxAvailLen()
185     if (diff < 0) {  in semaGetReadBoxAvailLen()
186         length = MAILBOX_PAYLOAD_LEN + diff;  in semaGetReadBoxAvailLen()
188         length = diff;  in semaGetReadBoxAvailLen()
307     int diff;  in semaGetWriteBoxAvailLen()  local
310         diff = mxcSemaBox1->readLocation - mxcSemaBox1->writeLocation;  in semaGetWriteBoxAvailLen()
312         diff = mxcSemaBox0->readLocation - mxcSemaBox0->writeLocation;  in semaGetWriteBoxAvailLen()
316     if (diff == 0) {  in semaGetWriteBoxAvailLen()
318     } else if (diff < 0) {  in semaGetWriteBoxAvailLen()
319         length = MAILBOX_PAYLOAD_LEN + diff - 1;  in semaGetWriteBoxAvailLen()
321         length = diff - 1;  in semaGetWriteBoxAvailLen()