MSG_DONTWAIT
if (send(l->fd, e, e->adm.ac_len, MSG_DONTWAIT) < 0) {
status = recvmsg(fd, &msg, MSG_DONTWAIT);
*lenp = recv(so, (caddr_t)&buf, sizeof(buf), MSG_PEEK | MSG_DONTWAIT);
flags |= MSG_DONTWAIT;
{MSG_DONTWAIT, LINUX_MSG_DONTWAIT},
flags |= MSG_DONTWAIT;
rc = my_soo_read(conn, &uio, MSG_DONTWAIT);
if (ret || (flags != MSG_DONTWAIT && u->uio_resid)) {
#define SBLOCKWAIT(f) (((f) & MSG_DONTWAIT) ? M_NOWAIT : M_WAITOK)
if (m == NULL || (((flags & MSG_DONTWAIT) == 0 &&
(flags & (MSG_DONTWAIT|MSG_NBIO))) {
((flags & MSG_DONTWAIT) == 0 &&
(flags & (MSG_DONTWAIT|MSG_NBIO))) {
#define SBLOCKWAIT(f) (((f) & MSG_DONTWAIT) ? M_NOWAIT : M_WAITOK)
flags |= MSG_DONTWAIT;
flags = MSG_DONTWAIT;
flags = MSG_DONTWAIT;
#define SBLOCKWAIT(f) (((f)&MSG_DONTWAIT) ? M_NOWAIT : M_WAITOK)
flags = MSG_DONTWAIT;
flags = MSG_DONTWAIT;
{RUMP_MSG_DONTWAIT, MSG_DONTWAIT},