libpthread/nptl/pthread_mutex_destroy.c

   1 /* Copyright (C) 2002, 2003, 2005, 2006 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <errno.h>
  20 #include "pthreadP.h"
  21
  22
  23 int
  24 attribute_protected
  25 __pthread_mutex_destroy (
  26      pthread_mutex_t *mutex)
  27 {
  28   if ((mutex->__data.__kind & PTHREAD_MUTEX_ROBUST_NORMAL_NP) == 0
  29       && mutex->__data.__nusers != 0)
  30     return EBUSY;
  31
  32   /* Set to an invalid value.  */
  33   mutex->__data.__kind = -1;
  34
  35   return 0;
  36 }
  37 strong_alias (__pthread_mutex_destroy, pthread_mutex_destroy)
  38 INTDEF(__pthread_mutex_destroy)