method_sync.c

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/*-------------------------------------------------------------------------
 *
 * 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;
}