/* pthread_key_delete.  Hurd version.

   Copyright (C) 2002-2018 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 <pthread.h>

#include <pt-internal.h>

int

pthread_key_delete (pthread_key_t key)

{

  error_t err = 0;

  __pthread_key_lock_ready ();

  __pthread_mutex_lock (&__pthread_key_lock);

  if (key < 0 || key >= __pthread_key_count

      || __pthread_key_destructors[key] == PTHREAD_KEY_INVALID)

    err = EINVAL;

  else

    {

      int i;

      __pthread_key_destructors[key] = PTHREAD_KEY_INVALID;

      __pthread_key_invalid_count++;

      __pthread_rwlock_rdlock (&__pthread_threads_lock);

      for (i = 0; i < __pthread_num_threads; ++i)

	{

	  struct __pthread *t;

	  t = __pthread_threads[i];

	  if (t == NULL)

	    continue;

	  /* Just remove the key, no need to care whether it was

	     already there. */

	  if (key < t->thread_specifics_size)

	    t->thread_specifics[key] = 0;

	}

      __pthread_rwlock_unlock (&__pthread_threads_lock);

    }

  __pthread_mutex_unlock (&__pthread_key_lock);

  return err;

}