1 /* File System File and Block Caches 2 * 3 * Copyright 2004-2005, Haiku Inc. All Rights Reserved. 4 * Distributed under the terms of the MIT License. 5 */ 6 #ifndef _FS_CACHE_H 7 #define _FS_CACHE_H 8 9 10 #include <fs_interface.h> 11 12 13 typedef void (*transaction_notification_hook)(int32 id, void *data); 14 15 #ifdef __cplusplus 16 extern "C" { 17 #endif 18 19 /* transactions */ 20 extern int32 cache_start_transaction(void *_cache); 21 extern status_t cache_sync_transaction(void *_cache, int32 id); 22 extern status_t cache_end_transaction(void *_cache, int32 id, transaction_notification_hook hook, void *data); 23 extern status_t cache_abort_transaction(void *_cache, int32 id); 24 extern int32 cache_detach_sub_transaction(void *_cache, int32 id, transaction_notification_hook hook, void *data); 25 extern status_t cache_abort_sub_transaction(void *_cache, int32 id); 26 extern status_t cache_start_sub_transaction(void *_cache, int32 id); 27 extern status_t cache_next_block_in_transaction(void *_cache, int32 id, uint32 *_cookie, 28 off_t *_blockNumber, void **_data, void **_unchangedData); 29 extern int32 cache_blocks_in_transaction(void *_cache, int32 id); 30 extern int32 cache_blocks_in_sub_transaction(void *_cache, int32 id); 31 32 /* block cache */ 33 extern void block_cache_delete(void *_cache, bool allowWrites); 34 extern void *block_cache_create(int fd, off_t numBlocks, size_t blockSize); 35 extern status_t block_cache_sync(void *_cache); 36 37 extern status_t block_cache_make_writable(void *_cache, off_t blockNumber, int32 transaction); 38 extern void *block_cache_get_writable_etc(void *_cache, off_t blockNumber, off_t base, 39 off_t length, int32 transaction); 40 extern void *block_cache_get_writable(void *_cache, off_t blockNumber, int32 transaction); 41 extern void *block_cache_get_empty(void *_cache, off_t blockNumber, int32 transaction); 42 extern const void *block_cache_get_etc(void *_cache, off_t blockNumber, off_t base, off_t length); 43 extern const void *block_cache_get(void *_cache, off_t blockNumber); 44 extern status_t block_cache_set_dirty(void *_cache, off_t blockNumber, bool isDirty, int32 transaction); 45 extern void block_cache_put(void *_cache, off_t blockNumber); 46 47 /* file cache */ 48 extern void *file_cache_create(mount_id mountID, vnode_id vnodeID, off_t size, int fd); 49 extern void file_cache_delete(void *_cacheRef); 50 extern status_t file_cache_set_size(void *_cacheRef, off_t size); 51 extern status_t file_cache_sync(void *_cache); 52 extern status_t file_cache_invalidate_file_map(void *_cacheRef, off_t offset, off_t size); 53 54 extern status_t file_cache_read_pages(void *_cacheRef, off_t offset, 55 const iovec *vecs, size_t count, size_t *_numBytes); 56 extern status_t file_cache_write_pages(void *_cacheRef, off_t offset, 57 const iovec *vecs, size_t count, size_t *_numBytes); 58 extern status_t file_cache_read(void *_cacheRef, off_t offset, void *bufferBase, size_t *_size); 59 extern status_t file_cache_write(void *_cacheRef, off_t offset, const void *buffer, size_t *_size); 60 61 #ifdef __cplusplus 62 } 63 #endif 64 65 #endif /* _FS_CACHE_H */ 66