* 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 BLOCKALLOCATOR_H
#define BLOCKALLOCATOR_H
#include <lock.h>
#include "ext2.h"
#include "Transaction.h"
class AllocationBlockGroup;
class Inode;
class Volume;
class BlockAllocator {
public:
BlockAllocator(Volume* volume);
~BlockAllocator();
status_t Initialize();
status_t AllocateBlocks(Transaction& transaction,
uint32 minimum, uint32 maximum, uint32& blockGroup,
fsblock_t& start, uint32& length);
status_t Allocate(Transaction& transaction, Inode* inode,
off_t numBlocks, uint32 minimum, fsblock_t& start,
uint32& length);
status_t Free(Transaction& transaction, fsblock_t start,
uint32 length);
uint32 FreeBlocks();
protected:
static status_t _Initialize(BlockAllocator* allocator);
Volume* fVolume;
mutex fLock;
AllocationBlockGroup* fGroups;
uint32 fBlocksPerGroup;
fsblock_t fNumBlocks;
uint32 fNumGroups;
fsblock_t fFirstBlock;
};
#endif
