IBV_CREATE_CQ(3) Libibverbs Programmer's Manual IBV_CREATE_CQ(3)NAME
ibv_create_cq, ibv_destroy_cq - create or destroy a completion queue
(CQ)
SYNOPSIS
#include <infiniband/verbs.h>
struct ibv_cq *ibv_create_cq(struct ibv_context *context, int cqe,
void *cq_context,
struct ibv_comp_channel *channel,
int comp_vector);
int ibv_destroy_cq(struct ibv_cq *cq);
DESCRIPTIONibv_create_cq() creates a completion queue (CQ) with at least cqe
entries for the InfiniBand device context context. The pointer cq_con‐
text will be used to set user context pointer of the CQ structure. The
argument channel is optional; if not NULL, the completion channel chan‐
nel will be used to return completion events. The CQ will use the com‐
pletion vector comp_vector for signaling completion events; it must be
at least zero and less than context->num_comp_vectors.
ibv_destroy_cq() destroys the CQ cq.
RETURN VALUEibv_create_cq() returns a pointer to the CQ, or NULL if the request
fails.
ibv_destroy_cq() returns 0 on success, or the value of errno on failure
(which indicates the failure reason).
NOTESibv_create_cq() may create a CQ with size greater than or equal to the
requested size. Check the cqe attribute in the returned CQ for the
actual size.
ibv_destroy_cq() fails if any queue pair is still associated with this
CQ.
SEE ALSOibv_resize_cq(3), ibv_req_notify_cq(3), ibv_create_qp(3)AUTHORS
Dotan Barak <dotanb@mellanox.co.il>
libibverbs 2006-10-31 IBV_CREATE_CQ(3)
