/**
* Called every period to heartbeat the callout queue.
*/
static void
cq_heartbeat(cqueue_t *cq)
{
tm_t tv;
time_delta_t delay;
cqueue_check(cq);
/*
* How much milliseconds elapsed since last heart beat?
*/
mutex_lock(&cq->cq_lock);
tm_now_exact(&tv);
delay = tm_elapsed_ms(&tv, &cq->cq_last_heartbeat);
cq->cq_last_heartbeat = tv; /* struct copy */
/*
* If too much variation, or too little, maybe the clock was adjusted.
* Assume a single period then.
*/
if (delay < 0 || delay > 10 * cq->cq_period)
delay = cq->cq_period;
/*
* We hold the mutex when calling cq_clock(), and it will be released there.
*/
cq_clock(cq, delay);
}
/**
* Display the data gathered during the last time period.
* Perhaps it would be better to have this done on a button click(?)
*/
static void
search_stats_gui_update_display(void)
{
gboolean sorting_disabled;
tm_t start_time, end_time;
time_delta_t elapsed;
stat_count = 0;
g_object_freeze_notify(G_OBJECT(treeview_search_stats));
gtk_list_store_clear(store_search_stats);
/*
* Temporarily disable sorting while inserting the updated table.
* Otherwise, CPU is overloaded with sorting every addition
* to the hash table.
*/
sorting_disabled = FALSE;
tm_now_exact(&start_time);
if (store_search_stats->sort_column_id >= 0) {
sorting_disabled = TRUE;
search_stats_gui_sort_save();
}
/* insert the hash table contents into the sorted treeview */
htable_foreach_remove(stat_hash, stats_hash_to_treeview, NULL);
tm_now_exact(&end_time);
elapsed = tm_elapsed_ms(&end_time, &start_time);
/*
* Re-enable sorting if previously disabled.
* If too much time has elapsed, leave sorting disabled.
*/
if (sorting_disabled && elapsed < 100) {
search_stats_gui_sort_restore();
} else if (!sorting_disabled && elapsed > 200) {
/*
* If sorting is disabled, and too much time is still elapsing,
* then the search stats collection will need to be
* discontinued
*/
search_stats_gui_reset();
search_stats_gui_disable();
search_stats_gui_overload = TRUE;
}
if (search_stats_gui_overload) {
/* update status bar message */
gtk_label_set_text(GTK_LABEL(label_search_stats_count),
"Disabling Search Stats due to system load" );
} else {
/* update the status bar counter */
gtk_label_printf(GTK_LABEL(label_search_stats_count),
NG_("%u term counted", "%u terms counted", stat_count),
stat_count);
}
g_object_thaw_notify(G_OBJECT(treeview_search_stats));
}