1 /* Test system cache line sizes.
2    Copyright (C) 2021 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
do_test(void)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>
58