4612433715
vector at the end of the file will be aligned to the given value. * BFS uses an alignment of 512 bytes (should be block size of the underlying device or BFS block size, whatever is less), which should be fine, since file data are only stored in BFS blocks. This totally avoids any partial operations at the I/O scheduler level, thus saving disk operations. Not that I could measure any performance difference. Theoretically it should help a lot though, particularly when dealing with lots of small files, since we avoid using bounce buffers, which are (a) limited in number and (b) require copying of the data. git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27246 a95241bf-73f2-0310-859d-f6bbb57e9c96
128 lines
4.8 KiB
C
128 lines
4.8 KiB
C
/*
|
|
* Copyright 2004-2008, Haiku Inc. All Rights Reserved.
|
|
* Distributed under the terms of the MIT License.
|
|
*/
|
|
#ifndef _FSSH_FS_CACHE_H
|
|
#define _FSSH_FS_CACHE_H
|
|
|
|
//! File System File and Block Caches
|
|
|
|
|
|
#include "fssh_fs_interface.h"
|
|
|
|
|
|
enum {
|
|
FSSH_TRANSACTION_WRITTEN = 0x01,
|
|
FSSH_TRANSACTION_ABORTED = 0x02,
|
|
FSSH_TRANSACTION_ENDED = 0x04,
|
|
FSSH_TRANSACTION_IDLE = 0x08
|
|
};
|
|
|
|
/* file map modes */
|
|
enum {
|
|
FSSH_FILE_MAP_CACHE_ON_DEMAND = 0x01, /* default mode */
|
|
FSSH_FILE_MAP_CACHE_ALL = 0x02
|
|
};
|
|
|
|
typedef void (*fssh_transaction_notification_hook)(int32_t id, int32_t event,
|
|
void *data);
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/* transactions */
|
|
extern int32_t fssh_cache_start_transaction(void *_cache);
|
|
extern fssh_status_t fssh_cache_sync_transaction(void *_cache, int32_t id);
|
|
extern fssh_status_t fssh_cache_end_transaction(void *_cache, int32_t id,
|
|
fssh_transaction_notification_hook hook,
|
|
void *data);
|
|
extern fssh_status_t fssh_cache_abort_transaction(void *_cache, int32_t id);
|
|
extern int32_t fssh_cache_detach_sub_transaction(void *_cache,
|
|
int32_t id, fssh_transaction_notification_hook hook,
|
|
void *data);
|
|
extern fssh_status_t fssh_cache_abort_sub_transaction(void *_cache,
|
|
int32_t id);
|
|
extern fssh_status_t fssh_cache_start_sub_transaction(void *_cache,
|
|
int32_t id);
|
|
extern fssh_status_t fssh_cache_add_transaction_listener(void *_cache,
|
|
int32_t id, int32_t events,
|
|
fssh_transaction_notification_hook hook,
|
|
void *data);
|
|
extern fssh_status_t fssh_cache_remove_transaction_listener(void *_cache,
|
|
int32_t id, fssh_transaction_notification_hook hook,
|
|
void *data);
|
|
extern fssh_status_t fssh_cache_next_block_in_transaction(void *_cache,
|
|
int32_t id, bool mainOnly, long *_cookie,
|
|
fssh_off_t *_blockNumber, void **_data,
|
|
void **_unchangedData);
|
|
extern int32_t fssh_cache_blocks_in_transaction(void *_cache,
|
|
int32_t id);
|
|
extern int32_t fssh_cache_blocks_in_main_transaction(void *_cache,
|
|
int32_t id);
|
|
extern int32_t fssh_cache_blocks_in_sub_transaction(void *_cache,
|
|
int32_t id);
|
|
|
|
/* block cache */
|
|
extern void fssh_block_cache_delete(void *_cache, bool allowWrites);
|
|
extern void * fssh_block_cache_create(int fd, fssh_off_t numBlocks,
|
|
fssh_size_t blockSize, bool readOnly);
|
|
extern fssh_status_t fssh_block_cache_sync(void *_cache);
|
|
extern fssh_status_t fssh_block_cache_sync_etc(void *_cache,
|
|
fssh_off_t blockNumber, fssh_size_t numBlocks);
|
|
extern fssh_status_t fssh_block_cache_make_writable(void *_cache,
|
|
fssh_off_t blockNumber, int32_t transaction);
|
|
extern void * fssh_block_cache_get_writable_etc(void *_cache,
|
|
fssh_off_t blockNumber, fssh_off_t base,
|
|
fssh_off_t length, int32_t transaction);
|
|
extern void * fssh_block_cache_get_writable(void *_cache,
|
|
fssh_off_t blockNumber, int32_t transaction);
|
|
extern void * fssh_block_cache_get_empty(void *_cache,
|
|
fssh_off_t blockNumber, int32_t transaction);
|
|
extern const void * fssh_block_cache_get_etc(void *_cache,
|
|
fssh_off_t blockNumber, fssh_off_t base,
|
|
fssh_off_t length);
|
|
extern const void * fssh_block_cache_get(void *_cache,
|
|
fssh_off_t blockNumber);
|
|
extern fssh_status_t fssh_block_cache_set_dirty(void *_cache,
|
|
fssh_off_t blockNumber, bool isDirty,
|
|
int32_t transaction);
|
|
extern void fssh_block_cache_put(void *_cache,
|
|
fssh_off_t blockNumber);
|
|
|
|
/* file cache */
|
|
extern void * fssh_file_cache_create(fssh_mount_id mountID,
|
|
fssh_vnode_id vnodeID, fssh_off_t size);
|
|
extern void fssh_file_cache_delete(void *_cacheRef);
|
|
extern void fssh_file_cache_enable(void *_cacheRef);
|
|
extern fssh_status_t fssh_file_cache_disable(void *_cacheRef);
|
|
extern bool fssh_file_cache_is_enabled(void *_cacheRef);
|
|
extern fssh_status_t fssh_file_cache_set_size(void *_cacheRef,
|
|
fssh_off_t size);
|
|
extern fssh_status_t fssh_file_cache_sync(void *_cache);
|
|
|
|
extern fssh_status_t fssh_file_cache_read(void *_cacheRef, void *cookie,
|
|
fssh_off_t offset, void *bufferBase,
|
|
fssh_size_t *_size);
|
|
extern fssh_status_t fssh_file_cache_write(void *_cacheRef, void *cookie,
|
|
fssh_off_t offset, const void *buffer,
|
|
fssh_size_t *_size);
|
|
|
|
/* file map */
|
|
extern void * fssh_file_map_create(fssh_mount_id mountID,
|
|
fssh_vnode_id vnodeID, fssh_off_t size);
|
|
extern void fssh_file_map_delete(void *_map);
|
|
extern void fssh_file_map_set_size(void *_map, fssh_off_t size);
|
|
extern void fssh_file_map_invalidate(void *_map, fssh_off_t offset,
|
|
fssh_off_t size);
|
|
extern fssh_status_t fssh_file_map_set_mode(void *_map, uint32_t mode);
|
|
extern fssh_status_t fssh_file_map_translate(void *_map, fssh_off_t offset,
|
|
fssh_size_t size, struct fssh_file_io_vec *vecs,
|
|
fssh_size_t *_count, fssh_size_t align);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* _FSSH_FS_CACHE_H */
|