Line data    Source code

       1              : /*--------------------------------------------------------------------------
       2              :  *
       3              :  * test_multixact.c
       4              :  *              Support code for multixact testing
       5              :  *
       6              :  * Portions Copyright (c) 1996-2026, PostgreSQL Global Development Group
       7              :  * Portions Copyright (c) 1994, Regents of the University of California
       8              :  *
       9              :  * IDENTIFICATION
      10              :  *              src/test/modules/test_slru/test_multixact.c
      11              :  *
      12              :  * -------------------------------------------------------------------------
      13              :  */
      14              : 
      15              : #include "postgres.h"
      16              : 
      17              : #include "access/multixact.h"
      18              : #include "access/xact.h"
      19              : #include "fmgr.h"
      20              : 
      21            0 : PG_FUNCTION_INFO_V1(test_create_multixact);
      22            0 : PG_FUNCTION_INFO_V1(test_read_multixact);
      23              : 
      24              : /*
      25              :  * Produces multixact with 2 current xids
      26              :  */
      27              : Datum
      28            0 : test_create_multixact(PG_FUNCTION_ARGS)
      29              : {
      30            0 :         MultiXactId id;
      31              : 
      32            0 :         MultiXactIdSetOldestMember();
      33            0 :         id = MultiXactIdCreate(GetCurrentTransactionId(), MultiXactStatusUpdate,
      34            0 :                                                    GetCurrentTransactionId(), MultiXactStatusForShare);
      35            0 :         PG_RETURN_TRANSACTIONID(id);
      36            0 : }
      37              : 
      38              : /*
      39              :  * Reads given multixact.  Discards local cache to make a real read.
      40              :  */
      41              : Datum
      42            0 : test_read_multixact(PG_FUNCTION_ARGS)
      43              : {
      44            0 :         MultiXactId id = PG_GETARG_TRANSACTIONID(0);
      45            0 :         MultiXactMember *members;
      46              : 
      47              :         /* discard caches */
      48            0 :         AtEOXact_MultiXact();
      49              : 
      50            0 :         if (GetMultiXactIdMembers(id, &members, false, false) == -1)
      51            0 :                 elog(ERROR, "MultiXactId not found");
      52              : 
      53            0 :         PG_RETURN_VOID();
      54            0 : }