+
+static void periodic_stats_dumper(FILE *f)
+{
+ const int64_t interval = 10 * 1000000000ULL;
+ bluesky_time_hires timestamp = bluesky_now_hires();
+ bluesky_time_hires next_timestamp = timestamp;
+
+ while (TRUE) {
+ g_static_mutex_lock(&stats_lock);
+ timestamp = bluesky_now_hires();
+ fprintf(f, "********\ntime=%f\n\n", timestamp / 1e9);
+ for (GList *item = stats_list; item != NULL; item = item->next) {
+ struct bluesky_stats *stats = (struct bluesky_stats *)item->data;
+ fprintf(f, "%s: count=%"PRIi64" sum=%"PRIi64"\n",
+ stats->name, stats->count, stats->sum);
+ }
+ g_static_mutex_unlock(&stats_lock);
+ fflush(f);
+
+ /* Wait until ten seconds from the last timestamp, with a few extra
+ * checks for sanity (always try to wait some amount of time in the
+ * range [0, 20] seconds). */
+ timestamp = bluesky_now_hires();
+ next_timestamp += interval;
+ if (next_timestamp < timestamp) {
+ next_timestamp = timestamp;
+ continue;
+ }
+ if (next_timestamp - timestamp > 2 * interval) {
+ next_timestamp = timestamp + interval;
+ }
+
+ struct timespec delay;
+ delay.tv_sec = (next_timestamp - timestamp) / 1000000000;
+ delay.tv_nsec = (next_timestamp - timestamp) % 1000000000;
+ nanosleep(&delay, NULL);
+ }
+}
+
+/* Start a background thread that will periodically dump statistics counters to
+ * he specified file every ten seconds. */
+void bluesky_stats_run_periodic_dump(FILE *f)
+{
+ g_thread_create((GThreadFunc)periodic_stats_dumper, f, FALSE, NULL);
+}