nptl/pthread_condattr_setpshared.c

   1 /* Copyright (C) 2002, 2003 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 int
  24 pthread_condattr_setpshared (attr, pshared)
  25      pthread_condattr_t *attr;
  26      int pshared;
  27 {
  28   if (pshared != PTHREAD_PROCESS_PRIVATE
  29       && __builtin_expect (pshared != PTHREAD_PROCESS_SHARED, 0))
  30     return EINVAL;
  31
  32   int *valuep = &((struct pthread_condattr *) attr)->value;
  33
  34   *valuep = (*valuep & ~1) | (pshared != PTHREAD_PROCESS_PRIVATE);
  35
  36   return 0;
  37 }