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, 23 transaction_notification_hook hook, void *data); 24 extern status_t cache_abort_transaction(void *_cache, int32 id); 25 extern int32 cache_detach_sub_transaction(void *_cache, int32 id, 26 transaction_notification_hook hook, void *data); 27 extern status_t cache_abort_sub_transaction(void *_cache, int32 id); 28 extern status_t cache_start_sub_transaction(void *_cache, int32 id); 29 extern status_t cache_next_block_in_transaction(void *_cache, int32 id, 30 uint32 *_cookie, off_t *_blockNumber, void **_data, 31 void **_unchangedData); 32 extern int32 cache_blocks_in_transaction(void *_cache, int32 id); 33 extern int32 cache_blocks_in_sub_transaction(void *_cache, int32 id); 34 35 /* block cache */ 36 extern void block_cache_delete(void *_cache, bool allowWrites); 37 extern void *block_cache_create(int fd, off_t numBlocks, size_t blockSize, 38 bool readOnly); 39 extern status_t block_cache_sync(void *_cache); 40 41 extern status_t block_cache_make_writable(void *_cache, off_t blockNumber, 42 int32 transaction); 43 extern void *block_cache_get_writable_etc(void *_cache, off_t blockNumber, 44 off_t base, off_t length, int32 transaction); 45 extern void *block_cache_get_writable(void *_cache, off_t blockNumber, 46 int32 transaction); 47 extern void *block_cache_get_empty(void *_cache, off_t blockNumber, 48 int32 transaction); 49 extern const void *block_cache_get_etc(void *_cache, off_t blockNumber, 50 off_t base, off_t length); 51 extern const void *block_cache_get(void *_cache, off_t blockNumber); 52 extern status_t block_cache_set_dirty(void *_cache, off_t blockNumber, 53 bool isDirty, int32 transaction); 54 extern void block_cache_put(void *_cache, off_t blockNumber); 55 56 /* file cache */ 57 extern void *file_cache_create(mount_id mountID, vnode_id vnodeID, off_t size, 58 int fd); 59 extern void file_cache_delete(void *_cacheRef); 60 extern status_t file_cache_set_size(void *_cacheRef, off_t size); 61 extern status_t file_cache_sync(void *_cache); 62 extern status_t file_cache_invalidate_file_map(void *_cacheRef, off_t offset, 63 off_t size); 64 65 extern status_t file_cache_read_pages(void *_cacheRef, off_t offset, 66 const iovec *vecs, size_t count, size_t *_numBytes); 67 extern status_t file_cache_write_pages(void *_cacheRef, off_t offset, 68 const iovec *vecs, size_t count, size_t *_numBytes); 69 extern status_t file_cache_read(void *_cacheRef, off_t offset, void *bufferBase, 70 size_t *_size); 71 extern status_t file_cache_write(void *_cacheRef, off_t offset, 72 const void *buffer, size_t *_size); 73 74 #ifdef __cplusplus 75 } 76 #endif 77 78 #endif /* _FS_CACHE_H */ 79