fbtl/pthread_mutexattr_setpshared.c

   1 /* Copyright (C) 2002-2013 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_setpshared (pthread_mutexattr_t *attr, int pshared)
  25 {
  26   struct pthread_mutexattr *iattr;
  27
  28   if (pshared != PTHREAD_PROCESS_PRIVATE
  29       && __builtin_expect (pshared != PTHREAD_PROCESS_SHARED, 0))
  30     return EINVAL;
  31
  32   iattr = (struct pthread_mutexattr *) attr;
  33
  34   if (pshared == PTHREAD_PROCESS_PRIVATE)
  35     iattr->mutexkind &= ~PTHREAD_MUTEXATTR_FLAG_PSHARED;
  36   else
  37     iattr->mutexkind |= PTHREAD_MUTEXATTR_FLAG_PSHARED;
  38
  39   return 0;
  40 }