[ofw] ibv_get_cq_event:: identifying send and receive CQ event

[Prasanna Vv]

Hi
I wish to know is it possible to wait for both send and receive CQ  
notification at a given point of time.
Let me explain my query with a code snippet below:

1.  create send and receive cq for a given channel as below:

+++++++++++++++++++++++++++++++++++++++++++++++
    ctx->ch = ibv_create_comp_channel(ctx->context);
    if (!ctx->ch) {
        fprintf(stderr, "Couldn't create comp channel\n");
        return NULL;
    }

   /* Recv CQ */
    ctx->rcq = ibv_create_cq(ctx->context, 1, ctx, ctx->ch, 0);
    if (!ctx->rcq) {
        fprintf(stderr, "Couldn't create recv CQ\n");
        return NULL;
    }

   /* Send CQ */
    ctx->scq = ibv_create_cq(ctx->context, 1, ctx, ctx->ch, 0);
    if (!ctx->scq) {
        fprintf(stderr, "Couldn't create send CQ\n");
        return NULL;
    }

    /* Request  send notification before any completion can be created */
    if (ibv_req_notify_cq(ctx->scq, 0)) {
            fprintf(stderr, "Couldn't request CQ notification\n");
            return 1;
    }

    /* Request  receive notification before any completion can be created */
    if (ibv_req_notify_cq(ctx->rcq, 0)) {
            fprintf(stderr, "Couldn't request CQ notification\n");
            return 1;
    }
++++++++++++++++++++++++++++++++++++++++++++++

2.  wait for a CQ event after concurrent post_send and post_recv 
operation and identify if the CQ event is for  send or receive

++++++++++++++++++++++++++++++++++++++++++++++++
    /* Wait for the completion event */
    if (ibv_get_cq_event(channel, &ev_cq, &ev_ctx)) {
            fprintf(stderr, "Failed to get cq_event\n");
            return 1;
    }

   if (ev_cq == ctx->rcq)
       printf(" receive cq event ...");
   else if (ev_cq == ctx->scq)
         printf(" send cq event ...");
   else
        printf(" ERROR in identifying notification ...")

    /* Ack the event */
    ibv_ack_cq_events(ev_cq, 1);
+++++++++++++++++++++++++++++++++++++++++++++++++++++


Please let me know if the mechanism (shown in code snippet above)  for  
identifying the event posted on  ibv_get_cq_event(..) is send or receive 
is correct.
Also, i welcome any other suggestions for the same.

Regards,
Prasanna