+/*
+ * This is the housekeeping loop. Worker threads come through here after
+ * processing client requests but before jumping back into the pool. We
+ * only allow housekeeping to execute once per minute, and we only allow one
+ * instance to run at a time.
+ */
+void do_housekeeping(void) {
+ static int housekeeping_in_progress = 0;
+ time_t last_timer = 0L;
+ int do_housekeeping_now = 0;
+
+ /*
+ * We do it this way instead of wrapping the whole loop in an
+ * S_HOUSEKEEPING critical section because it eliminates the need to
+ * potentially have multiple concurrent mutexes in progress.
+ */
+ begin_critical_section(S_HOUSEKEEPING);
+ if ( ((time(NULL) - last_timer) > 60L)
+ && (housekeeping_in_progress == 0) ) {
+ do_housekeeping_now = 1;
+ housekeeping_in_progress = 1;
+ last_timer = time(NULL);
+ }
+ end_critical_section(S_HOUSEKEEPING);
+ if (do_housekeeping_now == 0) return;
+
+ /*
+ * Ok, at this point we've made the decision to run the housekeeping
+ * loop. Everything below this point is real work.
+ */
+
+ cdb_check_handles(); /* suggested by Justin Case */
+ PerformSessionHooks(EVT_TIMER); /* Run any timer hooks */
+
+ /*
+ * All done.
+ */
+ housekeeping_in_progress = 0;
+}