/*
 * Copyright 2001-2010, Haiku Inc. All rights reserved.
 * This file may be used under the terms of the MIT License.
 *
 * Authors:
 *              Janito V. Ferreira Filho
 */
#ifndef INODEALLOCATOR_H
#define INODEALLOCATOR_H

#include <lock.h>

#include "ext2.h"
#include "Transaction.h"


class Inode;
class Volume;


class InodeAllocator {
public:
                                                InodeAllocator(Volume* volume);
        virtual                         ~InodeAllocator();

        virtual status_t        New(Transaction& transaction, Inode* parent,
                                                        int32 mode, ino_t& id);
        virtual status_t        Free(Transaction& transaction, ino_t id,
                                                        bool isDirectory);

private:
                        status_t        _Allocate(Transaction& transaction,
                                                        uint32 preferredBlockGroup, bool isDirectory,
                                                        ino_t& id);
                        status_t        _AllocateInGroup(Transaction& transaction,
                                                        uint32 blockGroup, bool isDirectory,
                                                        ino_t& id, uint32 numInodes);
                        status_t        _MarkInBitmap(Transaction& transaction,
                                                        fsblock_t bitmapBlock, uint32 blockGroup,
                                                        uint32 numInodes, uint32& pos, uint32& checksum);
                        status_t        _UnmarkInBitmap(Transaction& transaction,
                                                        fsblock_t bitmapBlock, uint32 numInodes, ino_t id,
                                                        uint32& checksum);
                        status_t        _InitGroup(Transaction& transaction,
                                                        ext2_block_group* group, fsblock_t bitmapBlock,
                                                        uint32 numInodes);
                        void            _SetInodeBitmapChecksum(ext2_block_group* group,
                                                        uint32 checksum);

                        Volume*         fVolume;
                        mutex           fLock;
};

#endif  // INODEALLOCATOR_H