UMAD_POLL - Online Linux Manual PageSection : 3
Updated : October 23, 2007
Source : OpenIB
Note : OpenIB Programmer's Manual

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NAMEumad_poll − poll umad

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SYNOPSIS#include <infiniband/umad.h> int umad_poll(int portid, int timeout_ms);

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DESCRIPTIONumad_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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RETURN VALUEumad_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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SEE ALSOumad_recv(3)

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AUTHORHal Rosenstock <halr@voltaire.com> 0

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Johanes Gumabo

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ERROR : Need New Coding :         (rof_TP|38|umad_poll.3|41|EOF|Hal Rosenstock )    

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