1 files changed, 47 insertions, 0 deletions
diff --git a/src/backend/storage/aio/method_sync.c b/src/backend/storage/aio/method_sync.c
new file mode 100644
index 00000000000..902c2428d41
--- /dev/null
+++ b/src/backend/storage/aio/method_sync.c
@@ -0,0 +1,47 @@
+/*-------------------------------------------------------------------------
+ *
+ * method_sync.c
+ *    AIO - perform "AIO" by executing it synchronously
+ *
+ * This method is mainly to check if AIO use causes regressions. Other IO
+ * methods might also fall back to the synchronous method for functionality
+ * they cannot provide.
+ *
+ * Portions Copyright (c) 1996-2025, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * IDENTIFICATION
+ *	  src/backend/storage/aio/method_sync.c
+ *
+ *-------------------------------------------------------------------------
+ */
+
+#include "postgres.h"
+
+#include "storage/aio.h"
+#include "storage/aio_internal.h"
+
+static bool pgaio_sync_needs_synchronous_execution(PgAioHandle *ioh);
+static int	pgaio_sync_submit(uint16 num_staged_ios, PgAioHandle **staged_ios);
+
+
+const IoMethodOps pgaio_sync_ops = {
+	.needs_synchronous_execution = pgaio_sync_needs_synchronous_execution,
+	.submit = pgaio_sync_submit,
+};
+
+
+
+static bool
+pgaio_sync_needs_synchronous_execution(PgAioHandle *ioh)
+{
+	return true;
+}
+
+static int
+pgaio_sync_submit(uint16 num_staged_ios, PgAioHandle **staged_ios)
+{
+	elog(ERROR, "IO should have been executed synchronously");
+
+	return 0;
+}