SBLOCKWAIT
error = SOCK_IO_RECV_LOCK(so, SBLOCKWAIT(flags));
error = SOCK_IO_SEND_LOCK(so, SBLOCKWAIT(flags));
error = SOCK_IO_SEND_LOCK(so, SBLOCKWAIT(flags));
error = SOCK_IO_RECV_LOCK(so, SBLOCKWAIT(flags));
error = SOCK_IO_RECV_LOCK(so, SBLOCKWAIT(flags));
error = SOCK_IO_SEND_LOCK(so, SBLOCKWAIT(flags));
error = SOCK_IO_RECV_LOCK(so, SBLOCKWAIT(flags));
error = SOCK_IO_SEND_LOCK(so, SBLOCKWAIT(flags));
error = SOCK_IO_RECV_LOCK(so, SBLOCKWAIT(flags));
error = SOCK_IO_RECV_LOCK(so, SBLOCKWAIT(in_flags));
error = SOCK_IO_SEND_LOCK(so, SBLOCKWAIT(flags));
error = SOCK_IO_RECV_LOCK(so, SBLOCKWAIT(flags));
error = SOCK_IO_SEND_LOCK(so, SBLOCKWAIT(flags));
error = SOCK_IO_RECV_LOCK(so, SBLOCKWAIT(flags));