void
gsl_data_cache_unref (GslDataCache *dcache)
{
g_return_if_fail (dcache != NULL);
restart:
g_return_if_fail (dcache->ref_count > 0);
if (dcache->ref_count == 1) /* possible destruction, need global lock */
{
g_return_if_fail (dcache->open_count == 0);
GSL_SPIN_LOCK (&global_dcache_mutex);
GSL_SPIN_LOCK (&dcache->mutex);
if (dcache->ref_count != 1)
{
/* damn, some other thread trapped in, restart */
GSL_SPIN_UNLOCK (&dcache->mutex);
GSL_SPIN_UNLOCK (&global_dcache_mutex);
goto restart;
}
dcache->ref_count = 0;
global_dcache_list = sfi_ring_remove (global_dcache_list, dcache);
GSL_SPIN_UNLOCK (&dcache->mutex);
global_dcache_count--;
global_dcache_n_aged_nodes -= dcache->n_nodes;
GSL_SPIN_UNLOCK (&global_dcache_mutex);
dcache_free (dcache);
}
else
{
GSL_SPIN_LOCK (&dcache->mutex);
if (dcache->ref_count < 2)
{
/* damn, some other thread trapped in, restart */
GSL_SPIN_UNLOCK (&dcache->mutex);
goto restart;
}
dcache->ref_count--;
GSL_SPIN_UNLOCK (&dcache->mutex);
}
}
static void
target_dcache_cleanup (struct address_space *aspace, void *arg)
{
dcache_free ((DCACHE *) arg);
}