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glibc  2.9
pthread_condattr_setpshared.c
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00001 /* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
00004 
00005    The GNU C Library is free software; you can redistribute it and/or
00006    modify it under the terms of the GNU Lesser General Public
00007    License as published by the Free Software Foundation; either
00008    version 2.1 of the License, or (at your option) any later version.
00009 
00010    The GNU C Library is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013    Lesser General Public License for more details.
00014 
00015    You should have received a copy of the GNU Lesser General Public
00016    License along with the GNU C Library; if not, write to the Free
00017    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00018    02111-1307 USA.  */
00019 
00020 #include <errno.h>
00021 #include <pthreadP.h>
00022 
00023 int
00024 pthread_condattr_setpshared (attr, pshared)
00025      pthread_condattr_t *attr;
00026      int pshared;
00027 {
00028   if (pshared != PTHREAD_PROCESS_PRIVATE
00029       && __builtin_expect (pshared != PTHREAD_PROCESS_SHARED, 0))
00030     return EINVAL;
00031 
00032   int *valuep = &((struct pthread_condattr *) attr)->value;
00033 
00034   *valuep = (*valuep & ~1) | (pshared != PTHREAD_PROCESS_PRIVATE);
00035 
00036   return 0;
00037 }