nptl/pthread_mutexattr_init.c

   1 /* Copyright (C) 2002 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 <string.h>
  21 #include <pthreadP.h>
  22
  23
  24 int
  25 __pthread_mutexattr_init (attr)
  26      pthread_mutexattr_t *attr;
  27 {
  28   if (sizeof (struct pthread_mutexattr) != sizeof (pthread_mutexattr_t))
  29     memset (attr, '\0', sizeof (*attr));
  30
  31   /* We use bit 31 to signal whether the mutex is going to be
  32      process-shared or not.  By default it is zero, i.e., the mutex is
  33      not process-shared.  */
  34   ((struct pthread_mutexattr *) attr)->mutexkind = PTHREAD_MUTEX_NORMAL;
  35
  36   return 0;
  37 }
  38 strong_alias (__pthread_mutexattr_init, pthread_mutexattr_init)