void aio_set_event_notifier(AioContext *ctx, EventNotifier *e, EventNotifierHandler *io_notify, AioFlushEventNotifierHandler *io_flush) { AioHandler *node; QLIST_FOREACH(node, &ctx->aio_handlers, node) { if (node->e == e && !node->deleted) { break; } } /* Are we deleting the fd handler? */ if (!io_notify) { if (node) { g_source_remove_poll(&ctx->source, &node->pfd); /* If the lock is held, just mark the node as deleted */ if (ctx->walking_handlers) { node->deleted = 1; node->pfd.revents = 0; } else { /* Otherwise, delete it for real. We can't just mark it as * deleted because deleted nodes are only cleaned up after * releasing the walking_handlers lock. */ QLIST_REMOVE(node, node); g_free(node); } } } else { if (node == NULL) { /* Alloc and insert if it's not already there */ node = g_malloc0(sizeof(AioHandler)); node->e = e; node->pfd.fd = (uintptr_t)event_notifier_get_handle(e); node->pfd.events = G_IO_IN; QLIST_INSERT_HEAD(&ctx->aio_handlers, node, node); g_source_add_poll(&ctx->source, &node->pfd); } /* Update handler with latest information */ node->io_notify = io_notify; node->io_flush = io_flush; } aio_notify(ctx); }