nptl/pthread_cond_init.c

/* Copyright (C) 2002, 2003, 2004 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 <shlib-compat.h>
#include "pthreadP.h"


int
__pthread_cond_init (cond, cond_attr)
     pthread_cond_t *cond;
     const pthread_condattr_t *cond_attr;
{
  /* Note that we don't need the PSHARED information from COND-ATTR.
     Conditional variables are always usable in multiple processes.  */
  struct pthread_condattr *icond_attr = (struct pthread_condattr *) cond_attr;

  cond->__data.__lock = LLL_MUTEX_LOCK_INITIALIZER;
  cond->__data.__futex = 0;
  cond->__data.__nwaiters = (icond_attr != NULL
			     && ((icond_attr->value & (COND_CLOCK_BITS << 1))
				 >> 1));
  cond->__data.__total_seq = 0;
  cond->__data.__wakeup_seq = 0;
  cond->__data.__woken_seq = 0;
  cond->__data.__mutex = (icond_attr == NULL || (icond_attr->value & 1) == 0
			  ? NULL : (void *) ~0l);
  cond->__data.__broadcast_seq = 0;

  return 0;
}
versioned_symbol (libpthread, __pthread_cond_init,
		  pthread_cond_init, GLIBC_2_3_2);