ptst_t *critical_enter(gc_global_t *gc_global)
{
ptst_t *ptst, *next, *new_next;
#ifdef NEED_ID
unsigned int id, oid;
#endif
ptst = (ptst_t *)pthread_getspecific(gc_global->ptst_key);
if ( ptst == NULL )
{
for ( ptst = _ptst_first(gc_global); ptst != NULL; ptst = ptst_next(ptst) )
{
if ( (ptst->count == 0) && (CASIO(&ptst->count, 0, 1) == 0) )
{
break;
}
}
if ( ptst == NULL )
{
ptst = ALIGNED_ALLOC(sizeof(*ptst));
if ( ptst == NULL ) exit(1);
memset(ptst, 0, sizeof(*ptst));
ptst->gc = gc_init(gc_global);
rand_init(ptst);
ptst->count = 1;
#ifdef NEED_ID
id = gc_global->next_id;
while ( (oid = CASIO(&gc_global->next_id, id, id+1)) != id ) id = oid;
ptst->id = id;
#endif
new_next = gc_global->ptst_list;
do {
ptst->next = next = new_next;
WMB_NEAR_CAS();
}
while ( (new_next = CASPO(&gc_global->ptst_list, next, ptst)) != next );
}
pthread_setspecific(gc_global->ptst_key, ptst);
}
gc_enter(ptst);
return(ptst);
}
static otag_t *
tag_opaque(otype_t type, otagtype_t tag_type)
{
otag_t *tag;
oobject_t object;
oobject_t *pointer;
gc_enter();
gc_ref(pointer);
onew_word(pointer, type);
object = *pointer;
gc_ref(pointer);
onew(pointer, tag);
tag = *pointer;
tag->name = object;
tag->type = tag_type;
tag->size = sizeof(oobject_t);
oput_hash(tag_table, (oentry_t *)tag);
gc_leave();
return (tag);
}