osfmk/ipc/ipc_voucher.c

98 void iv_dealloc(ipc_voucher_t iv, boolean_t unhash);
101 iv_reference(ipc_voucher_t iv)
105 	refs = hw_atomic_add(&iv->iv_refs, 1);
110 iv_release(ipc_voucher_t iv)
114 	assert(0 < iv->iv_refs);
115 	refs = hw_atomic_sub(&iv->iv_refs, 1);
117 		iv_dealloc(iv, TRUE);
226 	ipc_voucher_t iv;
230 	iv = (ipc_voucher_t)zalloc(ipc_voucher_zone);
231 	if (IV_NULL == iv)
234 	iv->iv_refs = 1;
235 	iv->iv_sum = 0;
236 	iv->iv_hash = 0;
237 	iv->iv_port = IP_NULL;
245 			zfree(ipc_voucher_zone, iv);
248 		iv->iv_table = table;
249 		iv->iv_table_size = entries;
251 		iv->iv_table = iv->iv_inline_table;
252 		iv->iv_table_size = IV_ENTRIES_INLINE;
256 	for (i=0; i < iv->iv_table_size; i++)
257 		iv->iv_table[i] = IV_UNUSED_VALINDEX;
259 	return (iv);
271 iv_set(ipc_voucher_t iv,
275 	assert(key_index < iv->iv_table_size);
276 	iv->iv_table[key_index] = value_index;
280 iv_dealloc(ipc_voucher_t iv, boolean_t unhash)
282 	ipc_port_t port = iv->iv_port;
290 		assert(0 == iv->iv_refs);
291 		assert(IV_HASH_BUCKETS > iv->iv_hash);
292 		queue_remove(&ivht_bucket[iv->iv_hash], iv, ipc_voucher_t, iv_hash_link);
297 				      VM_KERNEL_ADDRPERM((uintptr_t)iv), 0, ivht_count, 0, 0);
300 		assert(0 == --iv->iv_refs);
316 	for (i = 0; i < iv->iv_table_size; i++) {
317 		ivace_release(i, iv->iv_table[i]);
319 		iv_set(iv, i, ~0);
323 	if (iv->iv_table != iv->iv_inline_table)
324 		kfree(iv->iv_table,
325 		      iv->iv_table_size * sizeof(*iv->iv_table));
327 	zfree(ipc_voucher_zone, iv);
339 iv_lookup(ipc_voucher_t iv, iv_index_t key_index)
341 	if (key_index < iv->iv_table_size)
342 		return iv->iv_table[key_index];
423 	ipc_voucher_t iv;
432 		iv = convert_port_to_voucher(port);
434 		return iv;
477 	ipc_voucher_t iv;
481 	iv = (ipc_voucher_t)port->ip_kobject;
483 	ipc_voucher_release(iv);
1583 	ipc_voucher_t iv;
1596 	queue_iterate(&ivht_bucket[hash], iv, ipc_voucher_t, iv_hash_link) {
1597 		assert(iv->iv_hash == hash);
1600 		if (0 < iv->iv_refs && iv->iv_sum == sum) {
1604 			assert(iv->iv_table_size <= new_iv->iv_table_size);
1607 			for (i = 0; i < iv->iv_table_size; i++)
1608 				if (iv->iv_table[i] != new_iv->iv_table[i])
1610 			if (i < iv->iv_table_size)
1630 			refs = iv_reference(iv);
1633 				iv->iv_refs = 0;
1641 			return iv;