/* Memory handling for the scope data structures.

   Copyright (C) 2009-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C 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 2.1 of the License, or (at your option) any later version.

   The GNU C 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 C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#include <stdlib.h>

#include <ldsodefs.h>

#include <sysdep-cancel.h>

int

_dl_scope_free (void *old)

{

  struct dl_scope_free_list *fsl;

#define DL_SCOPE_FREE_LIST_SIZE (sizeof (fsl->list) / sizeof (fsl->list[0]))

  if (RTLD_SINGLE_THREAD_P)

    free (old);

  else if ((fsl = GL(dl_scope_free_list)) == NULL)

    {

      GL(dl_scope_free_list) = fsl = malloc (sizeof (*fsl));

      if (fsl == NULL)

	{

	  THREAD_GSCOPE_WAIT ();

	  free (old);

	  return 1;

	}

      else

	{

	  fsl->list[0] = old;

	  fsl->count = 1;

	}

    }

  else if (fsl->count < DL_SCOPE_FREE_LIST_SIZE)

    fsl->list[fsl->count++] = old;

  else

    {

      THREAD_GSCOPE_WAIT ();

      while (fsl->count > 0)

	free (fsl->list[--fsl->count]);

      return 1;

    }

  return 0;

}