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   umad_poll    ( 3 )

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Имя (Name)

umad_poll - poll umad

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Синопсис (Synopsis)

#include <infiniband/umad.h>

       int umad_poll(int portid, int timeout_ms);

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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.

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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

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Смотри также (See also)

umad_recv(3)

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