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/* Test case by Alexandre Duret-Lutz <duret_g@epita.fr>. */
#include <obstack.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#define obstack_chunk_alloc verbose_malloc
#define obstack_chunk_free verbose_free
#define ALIGN_BOUNDARY 64
#define ALIGN_MASK (ALIGN_BOUNDARY - 1)
#define OBJECT_SIZE 1000
static void *
verbose_malloc (size_t size)
{
void *buf = malloc (size);
printf ("malloc (%u) => %p\n", size, buf);
return buf;
}
static void
verbose_free (void *buf)
{
free (buf);
printf ("free (%p)\n", buf);
}
int
main (void)
{
int result = 0;
int align = 2;
while (align <= 64)
{
struct obstack obs;
int i;
int align_mask = align - 1;
printf ("\n Alignment mask: %d\n", align_mask);
obstack_init (&obs);
obstack_alignment_mask (&obs) = align_mask;
/* finish an empty object to take alignment into account */
obstack_finish (&obs);
/* let's allocate some objects and print their addresses */
for (i = 15; i > 0; --i)
{
void *obj = obstack_alloc (&obs, OBJECT_SIZE);
printf ("obstack_alloc (%u) => %p \t%s\n", OBJECT_SIZE, obj,
((uintptr_t) obj & align_mask) ? "(not aligned)" : "");
result |= ((uintptr_t) obj & align_mask) != 0;
}
/* clean up */
obstack_free (&obs, 0);
align <<= 1;
}
return result;
}
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