haiku/src/system/kernel/boot_item.cpp

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/*
* Copyright 2005-2008, Axel Dörfler, axeld@pinc-software.de. All rights reserved.
* Distributed under the terms of the MIT License.
*/
#include <boot_item.h>
#include <util/DoublyLinkedList.h>
#include <util/kernel_cpp.h>
#include <string.h>
// ToDo: the boot items are not supposed to be changed after kernel startup
// so no locking is done. So for now, we need to be careful with adding
// new items.
struct boot_item : public DoublyLinkedListLinkImpl<boot_item> {
const char *name;
void *data;
size_t size;
};
typedef DoublyLinkedList<boot_item> ItemList;
static ItemList sItemList;
status_t
add_boot_item(const char *name, void *data, size_t size)
{
boot_item *item = new(nothrow) boot_item;
if (item == NULL)
return B_NO_MEMORY;
item->name = name;
item->data = data;
item->size = size;
sItemList.Add(item);
return B_OK;
}
void *
get_boot_item(const char *name, size_t *_size)
{
if (name == NULL || name[0] == '\0')
return NULL;
// search item
for (ItemList::Iterator it = sItemList.GetIterator(); it.HasNext();) {
boot_item *item = it.Next();
if (!strcmp(name, item->name)) {
if (_size != NULL)
*_size = item->size;
return item->data;
}
}
return NULL;
}
status_t
boot_item_init(void)
{
new(&sItemList) ItemList;
// static initializers do not work in the kernel,
// so we have to do it here, manually
return B_OK;
}