nptl/pthread_mutexattr_settype.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
  23 int
  24 __pthread_mutexattr_settype (pthread_mutexattr_t *attr, int kind)
  25 {
  26   struct pthread_mutexattr *iattr;
  27
  28   if (kind < PTHREAD_MUTEX_NORMAL || kind > PTHREAD_MUTEX_ADAPTIVE_NP)
  29     return EINVAL;
  30
  31   /* Cannot distinguish between DEFAULT and NORMAL. So any settype
  32      call disables elision for now.  */
  33   if (kind == PTHREAD_MUTEX_NORMAL)
  34     kind |= PTHREAD_MUTEX_NO_ELISION_NP;
  35
  36   iattr = (struct pthread_mutexattr *) attr;
  37
  38   iattr->mutexkind = (iattr->mutexkind & PTHREAD_MUTEXATTR_FLAG_BITS) | kind;
  39
  40   return 0;
  41 }
  42 weak_alias (__pthread_mutexattr_settype, pthread_mutexattr_setkind_np)
  43 weak_alias (__pthread_mutexattr_settype, pthread_mutexattr_settype)
  44 hidden_def (__pthread_mutexattr_settype)