umad_poll(3) — Linux manual page

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | SEE ALSO | AUTHOR | COLOPHON

UMAD_POLL(3)           OpenIB Programmer's Manual           UMAD_POLL(3)

NAME         top

       umad_poll - poll umad

SYNOPSIS         top

       #include <infiniband/umad.h>

       int umad_poll(int portid, int timeout_ms);

DESCRIPTION         top

       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.

RETURN VALUE         top

       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

SEE ALSO         top

       umad_recv(3)

AUTHOR         top

       Hal Rosenstock <[email protected]>

COLOPHON         top

       This page is part of the rdma-core (RDMA Core Userspace Libraries
       and Daemons) project.  Information about the project can be found
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OpenIB                      October 23, 2007                UMAD_POLL(3)

Pages that refer to this page: umad_recv(3)