Axel Dörfler
b5a0c65c19
git-svn-id: file:///srv/svn/repos/haiku/trunk/current@2059 a95241bf-73f2-0310-859d-f6bbb57e9c96
61 lines
1.6 KiB
C++
61 lines
1.6 KiB
C++
#ifndef BLOCK_ALLOCATOR_H
|
|
#define BLOCK_ALLOCATOR_H
|
|
/* BlockAllocator - block bitmap handling and allocation policies
|
|
**
|
|
** Initial version by Axel Dörfler, [email protected]
|
|
** This file may be used under the terms of the OpenBeOS License.
|
|
*/
|
|
|
|
|
|
#include "Lock.h"
|
|
|
|
|
|
class AllocationGroup;
|
|
class Transaction;
|
|
class Volume;
|
|
class Inode;
|
|
struct disk_super_block;
|
|
struct block_run;
|
|
struct check_control;
|
|
struct check_cookie;
|
|
|
|
|
|
class BlockAllocator {
|
|
public:
|
|
BlockAllocator(Volume *volume);
|
|
~BlockAllocator();
|
|
|
|
status_t Initialize();
|
|
|
|
status_t AllocateForInode(Transaction *transaction, const block_run *parent,
|
|
mode_t type, block_run &run);
|
|
status_t Allocate(Transaction *transaction, const Inode *inode, off_t numBlocks,
|
|
block_run &run, uint16 minimum = 1);
|
|
status_t Free(Transaction *transaction, block_run run);
|
|
|
|
status_t AllocateBlocks(Transaction *transaction, int32 group, uint16 start,
|
|
uint16 numBlocks, uint16 minimum, block_run &run);
|
|
|
|
status_t StartChecking(check_control *control);
|
|
status_t StopChecking(check_control *control);
|
|
status_t CheckNextNode(check_control *control);
|
|
|
|
status_t CheckBlockRun(block_run run, const char *type = NULL, check_control *control = NULL);
|
|
status_t CheckInode(Inode *inode, check_control *control = NULL);
|
|
|
|
private:
|
|
bool CheckBitmapIsUsedAt(off_t block) const;
|
|
void SetCheckBitmapAt(off_t block);
|
|
|
|
static status_t initialize(BlockAllocator *);
|
|
|
|
Volume *fVolume;
|
|
Semaphore fLock;
|
|
AllocationGroup *fGroups;
|
|
int32 fNumGroups, fBlocksPerGroup;
|
|
uint32 *fCheckBitmap;
|
|
check_cookie *fCheckCookie;
|
|
};
|
|
|
|
#endif /* BLOCK_ALLOCATOR_H */
|