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/* zz30
*
* demonstrate a splay-tree depth problem
*/
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#ifndef SCALE
#define SCALE 10000
#endif
struct list
{
struct list *next;
};
int
main ()
{
struct list *head = NULL;
struct list *tail = NULL;
struct list *p;
long n;
int direction;
for (direction = 0; direction < 2; direction++)
{
fprintf (stdout, "allocating\n");
fflush (stdout);
for (n = 0; n < SCALE; ++n)
{
p = malloc (sizeof *p);
if (NULL == p)
{
fprintf (stdout, "malloc failed\n");
break;
}
if (direction == 0)
{ /* add at tail */
p->next = NULL;
if (NULL != tail)
tail->next = p;
else
head = p;
tail = p;
}
else
{ /* add at head */
p->next = head;
if (NULL == tail)
tail = p;
head = p;
}
}
fprintf (stdout, "freeing\n");
fflush (stdout);
while (NULL != head)
{
p = head;
head = head->next;
free (p);
}
}
fprintf (stdout, "done\n");
fflush (stdout);
return (0);
}
/* { dg-output "allocating.*freeing.*allocating.*freeing.*done" } */
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