nptl/pthread_cond_init.c

   1 /* Copyright (C) 2002, 2003, 2004, 2005, 2007, 2008
   2    Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #include <shlib-compat.h>
  22 #include "pthreadP.h"
  23
  24
  25 int
  26 __pthread_cond_init (cond, cond_attr)
  27      pthread_cond_t *cond;
  28      const pthread_condattr_t *cond_attr;
  29 {
  30   struct pthread_condattr *icond_attr = (struct pthread_condattr *) cond_attr;
  31
  32   cond->__data.__lock = LLL_LOCK_INITIALIZER;
  33   cond->__data.__futex = 0;
  34   cond->__data.__nwaiters = (icond_attr != NULL
  35                              ? ((icond_attr->value >> 1)
  36                                 & ((1 << COND_NWAITERS_SHIFT) - 1))
  37                              : CLOCK_REALTIME);
  38   cond->__data.__total_seq = 0;
  39   cond->__data.__wakeup_seq = 0;
  40   cond->__data.__woken_seq = 0;
  41   cond->__data.__mutex = (icond_attr == NULL || (icond_attr->value & 1) == 0
  42                           ? NULL : (void *) ~0l);
  43   cond->__data.__broadcast_seq = 0;
  44
  45   return 0;
  46 }
  47 versioned_symbol (libpthread, __pthread_cond_init,
  48                   pthread_cond_init, GLIBC_2_3_2);