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105 lines
3.0 KiB
105 lines
3.0 KiB
/*****************************************************************************
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* aligned_alloc test case
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*****************************************************************************
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* Copyright © 2019 Rémi Denis-Courmont
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2.1 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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*****************************************************************************/
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#include "config.h"
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#undef NDEBUG
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#include <assert.h>
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#include <stdalign.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <errno.h>
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struct big_align_struct {
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long long ll;
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double d;
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};
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/* Supported alignments. Others are undefined (ISO C11 §7.22.3, §J.2). */
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static const size_t alignv[] = {
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alignof (char),
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alignof (short),
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alignof (int),
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alignof (long),
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alignof (long long),
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alignof (float),
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alignof (double),
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alignof (struct big_align_struct),
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alignof (void *),
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alignof (max_align_t),
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};
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static const size_t alignc = sizeof (alignv) / sizeof (alignv[0]);
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static void test_posix_memalign(size_t align, size_t size)
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{
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void *p;
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int val = posix_memalign(&p, align, size);
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if (align >= sizeof (void *)) {
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if (val == 0) {
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assert(((uintptr_t)p & (align - 1)) == 0);
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free(p);
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}
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} else
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assert(val != 0);
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}
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int main(void)
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{
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void *p;
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/* aligned_alloc() */
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for (size_t i = 0; i < alignc; i++) {
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size_t align = alignv[i];
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assert((align & (align - 1)) == 0); /* must be a power of two */
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p = aligned_alloc(alignv[i], 0);
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free(p); /* must free {aligned_,c,m,c,re}alloc() allocations */
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for (size_t j = 0; j < alignc; j++) {
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size_t size = alignv[j];
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if (size < align)
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continue; /* size must be a multiple of alignment */
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p = aligned_alloc(align, size);
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assert(p != NULL); /* small non-zero bytes allocation */
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assert(((uintptr_t)p & (align - 1)) == 0);
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free(p);
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}
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}
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/* posix_memalign() */
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for (size_t i = 0; i < 21; i++) {
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size_t align = (size_t)1 << i;
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test_posix_memalign(align, 0);
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test_posix_memalign(align, 1);
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test_posix_memalign(align, align - 1);
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test_posix_memalign(align, align);
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test_posix_memalign(align, align * 2);
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}
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return 0;
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}
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