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[thirdparty/glibc.git] / sysdeps / htl / pt-key-delete.c

/* pthread_key_delete.  Hurd version.
   Copyright (C) 2002-2019 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;
}