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/* mpfr_free_cache... - Free cache/pool memory used by MPFR.
Copyright 2004-2017 Free Software Foundation, Inc.
Contributed by the AriC 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
http://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
#include "mpfr-impl.h"
/* Default number of entries for the mpz_t pool */
#ifndef MPFR_MY_MPZ_INIT
# define MPFR_MY_MPZ_INIT 32
#endif
/* If the number of entries of the mpz_t pool is not zero */
#if MPFR_MY_MPZ_INIT
/* Index in the stack table of mpz_t and stack table of mpz_t */
static MPFR_THREAD_ATTR int n_alloc = 0;
static MPFR_THREAD_ATTR __mpz_struct mpz_tab[MPFR_MY_MPZ_INIT];
MPFR_HOT_FUNCTION_ATTR void
mpfr_mpz_init (mpz_t z)
{
if (MPFR_LIKELY (n_alloc > 0))
{
/* Get a mpz_t from the MPFR stack of previously used mpz_t.
It reduces memory pressure, and it allows to reuse
a mpz_t which should be sufficiently big. */
MPFR_ASSERTD (n_alloc <= numberof (mpz_tab));
memcpy (z, &mpz_tab[--n_alloc], sizeof (mpz_t));
SIZ(z) = 0;
}
else
{
/* Call real GMP function */
(__gmpz_init)(z);
}
}
MPFR_HOT_FUNCTION_ATTR void
mpfr_mpz_init2 (mpz_t z, mp_bitcnt_t n)
{
if (MPFR_LIKELY (n_alloc > 0))
{
/* Get a mpz_t from the MPFR stack of previously used mpz_t.
It reduces memory pressure, and it allows to reuse
a mpz_t which should be sufficiently big. */
MPFR_ASSERTD (n_alloc <= numberof (mpz_tab));
memcpy (z, &mpz_tab[--n_alloc], sizeof (mpz_t));
SIZ(z) = 0;
}
else
{
/* Call real GMP function */
(__gmpz_init2)(z, n);
}
}
MPFR_HOT_FUNCTION_ATTR void
mpfr_mpz_clear (mpz_t z)
{
if (MPFR_LIKELY (n_alloc < numberof (mpz_tab)))
{
/* Push back the mpz_t inside the stack of the used mpz_t */
MPFR_ASSERTD (n_alloc >= 0);
memcpy (&mpz_tab[n_alloc++], z, sizeof (mpz_t));
}
else
{
/* Call real GMP function */
(__gmpz_clear)(z);
}
}
#endif
/* Theses caches may be global to all threads or local to the current */
static void
mpfr_free_const_caches (void)
{
#ifndef MPFR_USE_LOGGING
mpfr_clear_cache (__gmpfr_cache_const_pi);
mpfr_clear_cache (__gmpfr_cache_const_log2);
#else
mpfr_clear_cache (__gmpfr_normal_pi);
mpfr_clear_cache (__gmpfr_normal_log2);
mpfr_clear_cache (__gmpfr_logging_pi);
mpfr_clear_cache (__gmpfr_logging_log2);
#endif
mpfr_clear_cache (__gmpfr_cache_const_euler);
mpfr_clear_cache (__gmpfr_cache_const_catalan);
}
/* Theses caches are always local to a thread */
static void
mpfr_free_local_cache (void)
{
/* Before mpz caching */
mpfr_bernoulli_freecache();
#if MPFR_MY_MPZ_INIT
{ /* Avoid mixed declarations and code for ISO C90 support. */
int i;
MPFR_ASSERTD (n_alloc >= 0 && n_alloc <= numberof (mpz_tab));
for (i = 0; i < n_alloc; i++)
(__gmpz_clear)(&mpz_tab[i]);
n_alloc = 0;
}
#endif
}
void
mpfr_free_cache (void)
{
mpfr_free_local_cache();
mpfr_free_const_caches ();
}
void
mpfr_free_cache2 (mpfr_free_cache_t way)
{
if (way & MPFR_FREE_LOCAL_CACHE)
{
mpfr_free_local_cache();
#if !defined (WANT_SHARED_CACHE)
mpfr_free_const_caches ();
#endif
}
if (way & MPFR_FREE_GLOBAL_CACHE)
{
#if defined (WANT_SHARED_CACHE)
mpfr_free_const_caches ();
#endif
}
}
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