опрос UMMAD (poll umad)
Имя (Name)
umad_poll - poll umad
Синопсис (Synopsis)
#include <infiniband/umad.h>
int umad_poll(int portid, int timeout_ms);
Описание (Description)
umad_poll() waits up to timeout_ms milliseconds for a packet to
be received from the port specified by portid. Once a packet is
ready to be read, the function returns 0. After that the packet
can be read using umad_recv(). Otherwise, -ETIMEDOUT is
returned. Note that successfully polling a port does not
guarantee that the subsequent umad_recv() will be non blocking
when several threads are using the same port. Instead, use a
timeout_ms parameter of zero to umad_recv() to ensure a non-
blocking read.
Возвращаемое значение (Return value)
umad_poll() returns 0 on success, and a negative value on error
as follows:
-EINVAL invalid port handle or agentid
-ETIMEDOUT poll operation timed out
-EIO poll operation failed
Смотри также (See also)
umad_recv(3)
