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);
DESCRIPTIONibv_create_comp_channel() creates a completion event channel for the
InfiniBand device context context.
ibv_destroy_comp_channel() destroys the completion event channel chan‐
nel.
RETURN VALUEibv_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. A
completion channel is essentially file descriptor that is used to
deliver completion notifications to a userspace process. When a com‐
pletion 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 multi‐
ple completion channels.
ibv_destroy_comp_channel() fails if any CQs are still associated with
the completion event channel being destroyed.
SEE ALSOibv_open_device(3), ibv_create_cq(3), ibv_get_cq_event(3)AUTHORS
Dotan Barak <dotanb@mellanox.co.il>
libibverbs 2006-10-31 IBV_CREATE_COMP_CHANNEL(3)