1: /* Copyright (C) 2002, 2007 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, write to the Free
   17:    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   18:    02111-1307 USA.  */
   19: 
   20: #include <errno.h>
   21: #include "pthreadP.h"
   22: #include <lowlevellock.h>
   23: 
   24: 
   25: int
   26: pthread_barrier_destroy (barrier)
   27:      pthread_barrier_t *barrier;
   28: {
   29:   struct pthread_barrier *ibarrier;
   30:   int result = EBUSY;
   31: 
   32:   ibarrier = (struct pthread_barrier *) barrier;
   33: 
   34:   lll_lock (ibarrier->lock, ibarrier->private ^ FUTEX_PRIVATE_FLAG);
   35: 
   36:   if (__builtin_expect (ibarrier->left == ibarrier->init_count, 1))
   37:     /* The barrier is not used anymore.  */
   38:     result = 0;
   39:   else
   40:     /* Still used, return with an error.  */
   41:     lll_unlock (ibarrier->lock, ibarrier->private ^ FUTEX_PRIVATE_FLAG);
   42: 
   43:   return result;
   44: }