nptl/pthread_mutexattr_settype.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 <errno.h>
  21 #include <pthreadP.h>
  22
  23
  24 int
  25 __pthread_mutexattr_settype (attr, kind)
  26      pthread_mutexattr_t *attr;
  27      int kind;
  28 {
  29   struct pthread_mutexattr *iattr;
  30
  31   if (kind < PTHREAD_MUTEX_NORMAL || kind > PTHREAD_MUTEX_ADAPTIVE_NP)
  32     return EINVAL;
  33
  34   iattr = (struct pthread_mutexattr *) attr;
  35
  36   /* We use bit 31 to single whether the mutex is going to be
  37      process-shared or not.  */
  38   iattr->mutexkind = (iattr->mutexkind & 0x80000000) | kind;
  39
  40   return 0;
  41 }
  42 weak_alias (__pthread_mutexattr_settype, pthread_mutexattr_setkind_np)
  43 strong_alias (__pthread_mutexattr_settype, pthread_mutexattr_settype)