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/*
* Copyright (c) 2005 Hewlett-Packard Development Company, L.P.
* Original Author: Hans Boehm
*
* This file may be redistributed and/or modified under the
* terms of the GNU General Public License as published by the Free Software
* Foundation; either version 2, or (at your option) any later version.
*
* It is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License in the
* file doc/COPYING for more details.
*/
#if defined(HAVE_CONFIG_H)
# include "config.h"
#endif
#include "run_parallel.inc"
#include <stdlib.h>
#include <stdio.h>
#include "atomic_ops_malloc.h"
#define MAX_NTHREADS 100
#define N_REVERSALS 1000 /* must be even */
#define LENGTH 1000
#ifdef USE_STANDARD_MALLOC
# define AO_malloc(n) malloc(n)
# define AO_free(p) free(p)
# define AO_malloc_enable_mmap()
#endif
typedef struct list_node {
struct list_node *next;
int data;
} ln;
ln *cons(int d, ln *tail)
{
static size_t extra = 0;
size_t my_extra = extra;
ln *result;
int * extras;
int i;
if (my_extra > 100)
extra = my_extra = 0;
else
++extra;
result = AO_malloc(sizeof(ln) + sizeof(int)*my_extra);
if (result == 0)
{
fprintf(stderr, "Out of memory\n");
/* Normal for more than about 10 threads without mmap? */
abort();
}
result -> data = d;
result -> next = tail;
extras = (int *)(result+1);
for (i = 0; i < my_extra; ++i) extras[i] = 42;
return result;
}
void print_list(ln *l)
{
ln *p;
for (p = l; p != 0; p = p -> next)
{
fprintf(stderr, "%d, ", p -> data);
}
fprintf(stderr, "\n");
}
/* Check that l contains numbers from m to n inclusive in ascending order */
void check_list(ln *l, int m, int n)
{
ln *p;
int i;
for (p = l, i = m; p != 0; p = p -> next, ++i)
{
if (i != p -> data)
{
fprintf(stderr, "Found %d, expected %d\n", p -> data, i);
abort();
}
}
}
/* Create a list of integers from m to n */
ln *
make_list(int m, int n)
{
if (m > n) return 0;
return cons(m, make_list(m+1, n));
}
/* Reverse list x, and concatenate it to y, deallocating no longer needed */
/* nodes in x. */
ln *
reverse(ln *x, ln *y)
{
ln * result;
if (x == 0) return y;
result = reverse(x -> next, cons(x -> data, y));
AO_free(x);
return result;
}
int dummy_test(void) { return 1; }
#define LARGE 200000
void * run_one_test(void * arg) {
ln * x = make_list(1, LENGTH);
int i;
char *p = AO_malloc(LARGE);
char *q;
if (0 == p) {
fprintf(stderr, "AO_malloc(%d) failed: This is normal without mmap\n",
LARGE);
AO_free(p);
} else {
p[0] = p[LARGE/2] = p[LARGE-1] = 'a';
q = AO_malloc(LARGE);
q[0] = q[LARGE/2] = q[LARGE-1] = 'b';
if (p[0] != 'a' || p[LARGE/2] != 'a' || p[LARGE-1] != 'a') {
fprintf(stderr, "First large allocation smashed\n");
abort();
}
AO_free(p);
if (q[0] != 'b' || q[LARGE/2] != 'b' || q[LARGE-1] != 'b') {
fprintf(stderr, "Second large allocation smashed\n");
abort();
}
AO_free(q);
}
# if 0 /* enable for debugging */
x = reverse(x, 0);
print_list(x);
x = reverse(x, 0);
print_list(x);
# endif
for (i = 0; i < N_REVERSALS; ++i) {
x = reverse(x, 0);
}
check_list(x, 1, LENGTH);
return 0;
}
int main(int argc, char **argv) {
int nthreads;
int exper_n;
if (1 == argc) {
# if !defined(HAVE_MMAP)
nthreads = 3;
# else
nthreads = 10;
# endif
} else if (2 == argc) {
nthreads = atoi(argv[1]);
if (nthreads < 1 || nthreads > MAX_NTHREADS) {
fprintf(stderr, "Invalid # of threads argument\n");
exit(1);
}
} else {
fprintf(stderr, "Usage: %s [# of threads]\n", argv[0]);
exit(1);
}
printf("Performing %d reversals of %d element lists in %d threads\n",
N_REVERSALS, LENGTH, nthreads);
AO_malloc_enable_mmap();
run_parallel(nthreads, run_one_test, dummy_test, "AO_malloc/AO_free");
return 0;
}
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