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/* talloc-cache -- test file concerning memory allocation and cache
Copyright 2016-2025 Free Software Foundation, Inc.
Contributed by the Pascaline and Caramba projects, INRIA.
This file is part of the GNU MPFR Library.
The GNU MPFR Library is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 3 of the License, or (at your
option) any later version.
The GNU MPFR Library 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 Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public License
along with the GNU MPFR Library; see the file COPYING.LESSER.
If not, see <https://www.gnu.org/licenses/>. */
#include <stdlib.h>
#include "mpfr-test.h"
#define A 4096
#define I 10000
/* Variable v is used to check that the allocator is the current GMP one.
The assertions on v in would typically fail with MPFR 3.1.6, where the
allocation functions are memorized the first time they are seen. */
static int v = 0;
static void *
my_alloc1 (size_t s)
{
void *p = malloc (s + A);
if (p == NULL)
abort ();
MPFR_ASSERTN (v == 1);
*(int *) p = 1;
return (void *) ((char *) p + A);
}
static void *
my_realloc1 (void *p, size_t t, size_t s)
{
p = (void *) ((char *) p - A);
MPFR_ASSERTN (v == 1);
MPFR_ASSERTN (*(int *) p == 1);
return (void *) ((char *) realloc (p, s + A) + A);
}
static void
my_free1 (void *p, size_t t)
{
p = (void *) ((char *) p - A);
MPFR_ASSERTN (v == 1);
MPFR_ASSERTN (*(int *) p == 1);
free (p);
}
static void *
my_alloc2 (size_t s)
{
void *p = malloc (s + A);
if (p == NULL)
abort ();
MPFR_ASSERTN (v == 2);
*(int *) p = 2;
return (void *) ((char *) p + A);
}
static void *
my_realloc2 (void *p, size_t t, size_t s)
{
p = (void *) ((char *) p - A);
MPFR_ASSERTN (v == 2);
MPFR_ASSERTN (*(int *) p == 2);
return (void *) ((char *) realloc (p, s + A) + A);
}
static void
my_free2 (void *p, size_t t)
{
p = (void *) ((char *) p - A);
MPFR_ASSERTN (v == 2);
MPFR_ASSERTN (*(int *) p == 2);
free (p);
}
int
main (void)
{
mpfr_t x;
int err;
tests_memory_disabled = 2;
tests_start_mpfr ();
err = mpfr_mp_memory_cleanup ();
MPFR_ASSERTN (err == 0);
mp_set_memory_functions (my_alloc1, my_realloc1, my_free1);
v = 1;
mpfr_init2 (x, 53);
mpfr_set_ui (x, I, MPFR_RNDN);
mpfr_sin (x, x, MPFR_RNDN);
mpfr_clear (x);
err = mpfr_mp_memory_cleanup ();
MPFR_ASSERTN (err == 0);
mp_set_memory_functions (my_alloc2, my_realloc2, my_free2);
v = 2;
mpfr_init2 (x, 1000);
mpfr_set_ui (x, I, MPFR_RNDN);
mpfr_sin (x, x, MPFR_RNDN);
mpfr_clear (x);
tests_end_mpfr ();
return 0;
}
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