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) 1996-2026, 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           36 : pgaio_sync_needs_synchronous_execution(PgAioHandle *ioh)
      37              : {
      38           36 :     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              : }