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IBV_CREATE_COMP_CHANNEL(3)	  Libibverbs Programmer's Manual       IBV_CREATE_COMP_CHANNEL(3)

NAME
       ibv_create_comp_channel,  ibv_destroy_comp_channel  - create or destroy a completion event
       channel

SYNOPSIS
       #include <infiniband/verbs.h>

       struct ibv_comp_channel *ibv_create_comp_channel(struct ibv_context
							*context);

       int ibv_destroy_comp_channel(struct ibv_comp_channel *channel);

DESCRIPTION
       ibv_create_comp_channel() creates a completion event channel for the RDMA  device  context
       context.

       ibv_destroy_comp_channel() destroys the completion event channel channel.

RETURN VALUE
       ibv_create_comp_channel()  returns  a  pointer to the created completion event channel, or
       NULL if the request fails.

       ibv_destroy_comp_channel() returns 0 on success, or the value of errno on  failure  (which
       indicates the failure reason).

NOTES
       A  "completion  channel" is an abstraction introduced by libibverbs that does not exist in
       the InfiniBand Architecture verbs specification or RDMA Protocol Verbs  Specification.	A
       completion channel is essentially file descriptor that is used to deliver completion noti-
       fications to a userspace process.  When a completion event is generated for  a  completion
       queue  (CQ),  the event is delivered via the completion channel attached to that CQ.  This
       may be useful to steer completion events to different threads by using multiple completion
       channels.

       ibv_destroy_comp_channel() fails if any CQs are still associated with the completion event
       channel being destroyed.

SEE ALSO
       ibv_open_device(3), ibv_create_cq(3), ibv_get_cq_event(3)

AUTHORS
       Dotan Barak <dotanba@gmail.com>

libibverbs				    2006-10-31		       IBV_CREATE_COMP_CHANNEL(3)
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