void zbar_symbol_set_ref (const zbar_symbol_set_t *syms,
int delta)
{
zbar_symbol_set_t *ncsyms = (zbar_symbol_set_t*)syms;
if(!_zbar_refcnt(&ncsyms->refcnt, delta) && delta <= 0)
_zbar_symbol_set_free(ncsyms);
}
void _zbar_image_scanner_recycle_syms (zbar_image_scanner_t *iscn,
zbar_symbol_t *sym)
{
zbar_symbol_t *next = NULL;
for(; sym; sym = next) {
next = sym->next;
if(sym->refcnt && _zbar_refcnt(&sym->refcnt, -1)) {
/* unlink referenced symbol */
/* FIXME handle outstanding component refs (currently unsupported)
*/
assert(sym->data_alloc);
sym->next = NULL;
}
else {
int i;
recycle_bucket_t *bucket;
/* recycle unreferenced symbol */
if(!sym->data_alloc) {
sym->data = NULL;
sym->datalen = 0;
}
if(sym->syms) {
if(_zbar_refcnt(&sym->syms->refcnt, -1))
assert(0);
_zbar_image_scanner_recycle_syms(iscn, sym->syms->head);
sym->syms->head = NULL;
_zbar_symbol_set_free(sym->syms);
sym->syms = NULL;
}
for(i = 0; i < RECYCLE_BUCKETS; i++)
if(sym->data_alloc < 1 << (i * 2))
break;
if(i == RECYCLE_BUCKETS) {
assert(sym->data);
free(sym->data);
sym->data = NULL;
sym->data_alloc = 0;
i = 0;
}
bucket = &iscn->recycle[i];
/* FIXME cap bucket fill */
bucket->nsyms++;
sym->next = bucket->head;
bucket->head = sym;
}
}
}
static inline int recycle_syms (zbar_image_scanner_t *iscn,
zbar_symbol_set_t *syms)
{
if(_zbar_refcnt(&syms->refcnt, -1))
return(1);
_zbar_image_scanner_recycle_syms(iscn, syms->head);
syms->head = syms->tail = NULL;
syms->nsyms = 0;
return(0);
}
zbar_symbol_set_t *_zbar_symbol_set_create ()
{
zbar_symbol_set_t *syms = (zbar_symbol_set_t*)calloc(1, sizeof(*syms));
_zbar_refcnt(&syms->refcnt, 1);
return(syms);
}
