Line data    Source code

       1             : /*-------------------------------------------------------------------------
       2             :  *
       3             :  * method_sync.c
       4             :  *    AIO - perform "AIO" by executing it synchronously
       5             :  *
       6             :  * This method is mainly to check if AIO use causes regressions. Other IO
       7             :  * methods might also fall back to the synchronous method for functionality
       8             :  * they cannot provide.
       9             :  *
      10             :  * Portions Copyright (c) 1996-2025, PostgreSQL Global Development Group
      11             :  * Portions Copyright (c) 1994, Regents of the University of California
      12             :  *
      13             :  * IDENTIFICATION
      14             :  *    src/backend/storage/aio/method_sync.c
      15             :  *
      16             :  *-------------------------------------------------------------------------
      17             :  */
      18             : 
      19             : #include "postgres.h"
      20             : 
      21             : #include "storage/aio.h"
      22             : #include "storage/aio_internal.h"
      23             : 
      24             : static bool pgaio_sync_needs_synchronous_execution(PgAioHandle *ioh);
      25             : static int  pgaio_sync_submit(uint16 num_staged_ios, PgAioHandle **staged_ios);
      26             : 
      27             : 
      28             : const IoMethodOps pgaio_sync_ops = {
      29             :     .needs_synchronous_execution = pgaio_sync_needs_synchronous_execution,
      30             :     .submit = pgaio_sync_submit,
      31             : };
      32             : 
      33             : 
      34             : 
      35             : static bool
      36          72 : pgaio_sync_needs_synchronous_execution(PgAioHandle *ioh)
      37             : {
      38          72 :     return true;
      39             : }
      40             : 
      41             : static int
      42           0 : pgaio_sync_submit(uint16 num_staged_ios, PgAioHandle **staged_ios)
      43             : {
      44           0 :     elog(ERROR, "IO should have been executed synchronously");
      45             : 
      46             :     return 0;
      47             : }