tests/test-aligned_alloc.c

   1 /* Test of allocating memory with given alignment.
   2
   3    Copyright (C) 2020-2024 Free Software Foundation, Inc.
   4
   5    This program is free software: you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation, either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program 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
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  17
  18 /* Written by Bruno Haible <bruno@clisp.org>, 2020.  */
  19
  20 #include <config.h>
  21
  22 /* Specification.  */
  23 #include <stdlib.h>
  24
  25 #include <stdint.h>
  26 #include <stdio.h>
  27 #include <string.h>
  28
  29 #include "macros.h"
  30
  31 #define ROUNDUP(x,y) (((x) + (y) - 1) & - (y))
  32
  33 int
  34 main (int argc, char *argv[])
  35 {
  36 #if HAVE_ALIGNED_ALLOC
  37   static size_t sizes[] =
  38     { 13, 8, 17, 450, 320, 1, 99, 4, 15, 16, 2, 76, 37, 127, 2406, 641, 5781 };
  39   void *volatile aligned2_blocks[SIZEOF (sizes)];
  40   void *volatile aligned4_blocks[SIZEOF (sizes)];
  41   void *volatile aligned8_blocks[SIZEOF (sizes)];
  42   void *volatile aligned16_blocks[SIZEOF (sizes)];
  43   void *volatile aligned32_blocks[SIZEOF (sizes)];
  44   void *volatile aligned64_blocks[SIZEOF (sizes)];
  45   size_t i;
  46
  47   for (i = 0; i < SIZEOF (sizes); i++)
  48     {
  49       size_t size = sizes[i];
  50
  51       aligned2_blocks[i] = aligned_alloc (2, ROUNDUP (size, 2));
  52       ASSERT (aligned2_blocks[i] != NULL);
  53       ASSERT (((uintptr_t) aligned2_blocks[i] % 2) == 0);
  54       memset (aligned2_blocks[i], 'u', size);
  55
  56       aligned4_blocks[i] = aligned_alloc (4, ROUNDUP (size, 4));
  57       ASSERT (aligned4_blocks[i] != NULL);
  58       ASSERT (((uintptr_t) aligned4_blocks[i] % 4) == 0);
  59       memset (aligned4_blocks[i], 'v', size);
  60
  61       aligned8_blocks[i] = aligned_alloc (8, ROUNDUP (size, 8));
  62       ASSERT (aligned8_blocks[i] != NULL);
  63       ASSERT (((uintptr_t) aligned8_blocks[i] % 8) == 0);
  64       memset (aligned8_blocks[i], 'w', size);
  65
  66       aligned16_blocks[i] = aligned_alloc (16, ROUNDUP (size, 16));
  67       ASSERT (aligned16_blocks[i] != NULL);
  68       ASSERT (((uintptr_t) aligned16_blocks[i] % 16) == 0);
  69       memset (aligned16_blocks[i], 'x', size);
  70
  71       aligned32_blocks[i] = aligned_alloc (32, ROUNDUP (size, 32));
  72       ASSERT (aligned32_blocks[i] != NULL);
  73       ASSERT (((uintptr_t) aligned32_blocks[i] % 32) == 0);
  74       memset (aligned32_blocks[i], 'y', size);
  75
  76       aligned64_blocks[i] = aligned_alloc (64, ROUNDUP (size, 64));
  77       ASSERT (aligned64_blocks[i] != NULL);
  78       ASSERT (((uintptr_t) aligned64_blocks[i] % 64) == 0);
  79       memset (aligned64_blocks[i], 'z', size);
  80     }
  81
  82   for (i = 0; i < SIZEOF (sizes); i++)
  83     {
  84       free (aligned2_blocks[i]);
  85       free (aligned4_blocks[i]);
  86       free (aligned8_blocks[i]);
  87       free (aligned16_blocks[i]);
  88       free (aligned32_blocks[i]);
  89       free (aligned64_blocks[i]);
  90     }
  91
  92   return test_exit_status;
  93 #else
  94   fputs ("Skipping test: function 'aligned_alloc' does not exist\n", stderr);
  95   return 77;
  96 #endif
  97 }