1  /* Test system cache line sizes.
       2     Copyright (C) 2021-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library; if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include <stdio.h>
      20  #include <stdlib.h>
      21  #include <unistd.h>
      22  #include <array_length.h>
      23  
      24  static struct
      25  {
      26    const char *name;
      27    int _SC_val;
      28  } sc_options[] =
      29    {
      30  #define N(name) { "_SC_"#name, _SC_##name }
      31      N (LEVEL1_ICACHE_LINESIZE),
      32      N (LEVEL1_DCACHE_LINESIZE),
      33      N (LEVEL2_CACHE_LINESIZE)
      34    };
      35  
      36  static int
      37  do_test (void)
      38  {
      39    int result = EXIT_SUCCESS;
      40  
      41    for (int i = 0; i < array_length (sc_options); ++i)
      42      {
      43        long int scret = sysconf (sc_options[i]._SC_val);
      44        if (scret < 0)
      45  	{
      46  	  printf ("sysconf (%s) returned < 0 (%ld)\n",
      47  		  sc_options[i].name, scret);
      48  	  result = EXIT_FAILURE;
      49  	}
      50        else
      51  	printf ("sysconf (%s): %ld\n", sc_options[i].name, scret);
      52      }
      53  
      54    return result;
      55  }
      56  
      57  #include <support/test-driver.c>