[rabbitmq-discuss] What does the "SUMMARY_EVERY_US" mean in rabbitmq-c?

Wed Jul 24 02:31:36 BST 2013

Hey, there

I am using rabbitmq-c for some applications. I got those code from the 
amqp_consumer.c, and the filed "next_summary_time " seemed to confuse me. 
What does the if 

clause (in bold) do here?

Many thanks!

> ...... 

#define SUMMARY_EVERY_US 100000

 ......

uint64_t next_summary_time = start_time + SUMMARY_EVERY_US;
> uint64_t now = now_microseconds();
>     *  **if (now > next_summary_time) {*
>         int countOverInterval = received - previous_received;
>         double intervalRate = countOverInterval / ((now - 
> previous_report_time) / 1000000.0);
>         printf("%d ms: Received %d - %d since last report (%d Hz)\n",
>            (int)(now - start_time) / 1000, received, countOverInterval, 
> (int) intervalRate);
>   
>         previous_received = received;
>         previous_report_time = now;
>         next_summary_time += SUMMARY_EVERY_US;
>       }
>   
>       amqp_maybe_release_buffers(conn);
> ......

Hugo. 
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