IBV_CREATE_COMP_CHANNEL(Libibverbs Programmer's ManuIBV_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 chan-
nel.
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 notifications to a
userspace process. When a completion event is generated for a comple-
tion queue (CQ), the event is delivered via the completion channel at-
tached 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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