nptl/pthread_mutex_destroy.c

   1 /* Copyright (C) 2002-2017 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 #include <stap-probe.h>
  23
  24
  25 int
  26 __pthread_mutex_destroy (pthread_mutex_t *mutex)
  27 {
  28   LIBC_PROBE (mutex_destroy, 1, mutex);
  29
  30   if ((mutex->__data.__kind & PTHREAD_MUTEX_ROBUST_NORMAL_NP) == 0
  31       && mutex->__data.__nusers != 0)
  32     return EBUSY;
  33
  34   /* Set to an invalid value.  */
  35   mutex->__data.__kind = -1;
  36
  37   return 0;
  38 }
  39 weak_alias (__pthread_mutex_destroy, pthread_mutex_destroy)
  40 hidden_def (__pthread_mutex_destroy)