/* * Do clean-up and notifications in the main thread */ static bool worker_post(gpointer _wj) { WorkerJob* wj = _wj; QueueItem* job = wj->job; WfWorker* w = wj->worker; if(!job->cancelled){ Waveform* waveform = g_weak_ref_get(&job->ref); call(job->done, waveform, NULL, job->user_data); if(waveform) g_object_unref(waveform); } if(job->free && job->user_data){ job->free(job->user_data); job->user_data = NULL; } w->jobs = g_list_remove(w->jobs, job); g_weak_ref_set(&job->ref, NULL); g_free(job); g_free(wj); return G_SOURCE_REMOVE; }
/* * recv_writer_queue - return the number of queued items */ static int recv_writer_queue(void) { PGconn *conn; List *queue; int ret; char *instid = NULL; bool connection_used = false; pthread_mutex_lock(&writer_queue_lock); queue = writer_queue; writer_queue = NIL; pthread_mutex_unlock(&writer_queue_lock); if (list_length(queue) == 0) return 0; /* install writer schema */ if ((conn = writer_connect(superuser_connect)) == NULL) { elog(ERROR, "could not connect to repository"); /* discard current queue if can't connect to repository */ if (list_length(queue) > 0) { elog(WARNING, "writer discards %d items", list_length(queue)); list_destroy(queue, destroy_writer_queue); } return 0; } /* do the writer queue process */ if ((instid = get_instid(conn)) != NULL) { connection_used = true; while (list_length(queue) > 0) { QueueItem *item = (QueueItem *) linitial(queue); if (!item->exec(item, conn, instid)) { if (++item->retry < DB_MAX_RETRY) break; /* retry the item */ /* * discard if the retry count is exceeded to avoid infinite * loops at one bad item. */ elog(WARNING, "writer discard an item"); } item->free(item); queue = list_delete_first(queue); } } free(instid); /* delay on error */ if (list_length(queue) > 0) delay(); /* * When we have failed items, we concatenate to the head of writer queue * and retry them in the next cycle. */ pthread_mutex_lock(&writer_queue_lock); writer_queue = list_concat(queue, writer_queue); ret = list_length(writer_queue); pthread_mutex_unlock(&writer_queue_lock); /* update last used time of the connection. */ if (connection_used) writer_conn_last_used = time(NULL); return ret; }