mirror of
https://gitlab.com/sortix/sortix.git
synced 2023-02-13 20:55:38 -05:00
54 lines
1.4 KiB
C++
54 lines
1.4 KiB
C++
/*******************************************************************************
|
|
|
|
Copyright(C) Jonas 'Sortie' Termansen 2013.
|
|
|
|
This program is free software: you can redistribute it and/or modify it
|
|
under the terms of the GNU General Public License as published by the Free
|
|
Software Foundation, either version 3 of the License, or (at your option)
|
|
any later version.
|
|
|
|
This program is distributed in the hope that it will be useful, but WITHOUT
|
|
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
more details.
|
|
|
|
You should have received a copy of the GNU General Public License along with
|
|
this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
device.h
|
|
Block device.
|
|
|
|
*******************************************************************************/
|
|
|
|
#ifndef DEVICE_H
|
|
#define DEVICE_H
|
|
|
|
class Block;
|
|
|
|
const size_t DEVICE_HASH_LENGTH = 1 << 16;
|
|
|
|
class Device
|
|
{
|
|
public:
|
|
Device(int fd, uint32_t block_size, bool write);
|
|
~Device();
|
|
|
|
public:
|
|
Block* mru_block;
|
|
Block* lru_block;
|
|
Block* dirty_block;
|
|
Block* hash_blocks[DEVICE_HASH_LENGTH];
|
|
off_t device_size;
|
|
uint32_t block_size;
|
|
int fd;
|
|
bool write;
|
|
|
|
public:
|
|
Block* GetBlock(uint32_t block_id);
|
|
Block* GetBlockZeroed(uint32_t block_id);
|
|
Block* GetCachedBlock(uint32_t block_id);
|
|
void Sync();
|
|
|
|
};
|
|
|
|
#endif
|