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);

DESCRIPTION

       ibv_create_cq() creates a completion queue (CQ) with at least cqe entries for the RDMA device context context.  The pointer cq_context will
       be used to set user context pointer of the CQ structure. The argument channel is optional; if not NULL, the completion channel channel will
       be  used  to  return  completion  events.  The CQ will use the completion 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 VALUE

       ibv_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).

NOTES

       ibv_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 ALSO

       ibv_resize_cq(3), ibv_req_notify_cq(3), ibv_ack_cq_events(3), ibv_create_qp(3)

AUTHORS

       Dotan Barak <dotanba@gmail.com>

libibverbs							    2006-10-31							  IBV_CREATE_CQ(3)