old_pthread_cond_wait.c

#if SHLIB_COMPAT(libpthread, GLIBC_2_0, GLIBC_2_3_2)
int
__pthread_cond_wait_2_0 (cond, mutex)
     pthread_cond_2_0_t *cond;
     pthread_mutex_t *mutex;
{
  if (cond->cond == NULL)
    {
      pthread_cond_t *newcond;

#if LLL_LOCK_INITIALIZER == 0
      newcond = (pthread_cond_t *) calloc (sizeof (pthread_cond_t), 1);
      if (newcond == NULL)
	return ENOMEM;
#else
      newcond = (pthread_cond_t *) malloc (sizeof (pthread_cond_t));
      if (newcond == NULL)
	return ENOMEM;

      /* Initialize the condvar.  */
      (void) pthread_cond_init (newcond, NULL);
#endif

      if (atomic_compare_and_exchange_bool_acq (&cond->cond, newcond, NULL))
	/* Somebody else just initialized the condvar.  */
	free (newcond);
    }

  return __pthread_cond_wait (cond->cond, mutex);
}
compat_symbol (libpthread, __pthread_cond_wait_2_0, pthread_cond_wait,
	       GLIBC_2_0);
#endif