nptl/pthread_condattr_setpshared.c

/* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#include <errno.h>
#include <pthreadP.h>

int
pthread_condattr_setpshared (attr, pshared)
     pthread_condattr_t *attr;
     int pshared;
{
  if (pshared != PTHREAD_PROCESS_PRIVATE
      && __builtin_expect (pshared != PTHREAD_PROCESS_SHARED, 0))
    return EINVAL;

  int *valuep = &((struct pthread_condattr *) attr)->value;

  *valuep = (*valuep & ~1) | (pshared != PTHREAD_PROCESS_PRIVATE);

  return 0;
}