nptl/sysdeps/unix/sysv/linux/sparc/sparc32/pthread_barrier_init.c

   1 /* Copyright (C) 2002, 2006 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 #include <lowlevellock.h>
  23
  24 struct sparc_pthread_barrier
  25 {
  26   struct pthread_barrier b;
  27   unsigned char left_lock;
  28   unsigned char pshared;
  29 };
  30
  31 int
  32 pthread_barrier_init (barrier, attr, count)
  33      pthread_barrier_t *barrier;
  34      const pthread_barrierattr_t *attr;
  35      unsigned int count;
  36 {
  37   struct sparc_pthread_barrier *ibarrier;
  38
  39   if (__builtin_expect (count == 0, 0))
  40     return EINVAL;
  41
  42   struct pthread_barrierattr *iattr = (struct pthread_barrierattr *) attr;
  43   if (iattr != NULL)
  44     {
  45       if (iattr->pshared != PTHREAD_PROCESS_PRIVATE
  46           && __builtin_expect (iattr->pshared != PTHREAD_PROCESS_SHARED, 0))
  47         /* Invalid attribute.  */
  48         return EINVAL;
  49     }
  50
  51   ibarrier = (struct sparc_pthread_barrier *) barrier;
  52
  53   /* Initialize the individual fields.  */
  54   ibarrier->b.lock = LLL_LOCK_INITIALIZER;
  55   ibarrier->b.left = count;
  56   ibarrier->b.init_count = count;
  57   ibarrier->b.curr_event = 0;
  58   ibarrier->left_lock = 0;
  59   ibarrier->pshared = (iattr && iattr->pshared == PTHREAD_PROCESS_SHARED);
  60
  61   return 0;
  62 }