1 /* 2 * Copyright 2004-2007, Haiku Inc. All Rights Reserved. 3 * Distributed under the terms of the MIT License. 4 */ 5 #ifndef _FS_CACHE_H 6 #define _FS_CACHE_H 7 8 /*! File System File and Block Caches */ 9 10 11 #include <fs_interface.h> 12 13 14 typedef void (*transaction_notification_hook)(int32 id, void *data); 15 16 #ifdef __cplusplus 17 extern "C" { 18 #endif 19 20 /* transactions */ 21 extern int32 cache_start_transaction(void *_cache); 22 extern status_t cache_sync_transaction(void *_cache, int32 id); 23 extern status_t cache_end_transaction(void *_cache, int32 id, 24 transaction_notification_hook hook, void *data); 25 extern status_t cache_abort_transaction(void *_cache, int32 id); 26 extern int32 cache_detach_sub_transaction(void *_cache, int32 id, 27 transaction_notification_hook hook, void *data); 28 extern status_t cache_abort_sub_transaction(void *_cache, int32 id); 29 extern status_t cache_start_sub_transaction(void *_cache, int32 id); 30 extern status_t cache_next_block_in_transaction(void *_cache, int32 id, 31 uint32 *_cookie, off_t *_blockNumber, void **_data, 32 void **_unchangedData); 33 extern int32 cache_blocks_in_transaction(void *_cache, int32 id); 34 extern int32 cache_blocks_in_sub_transaction(void *_cache, int32 id); 35 36 /* block cache */ 37 extern void block_cache_delete(void *_cache, bool allowWrites); 38 extern void *block_cache_create(int fd, off_t numBlocks, size_t blockSize, 39 bool readOnly); 40 extern status_t block_cache_sync(void *_cache); 41 extern status_t block_cache_sync_etc(void *_cache, off_t blockNumber, 42 size_t numBlocks); 43 extern status_t block_cache_make_writable(void *_cache, off_t blockNumber, 44 int32 transaction); 45 extern void *block_cache_get_writable_etc(void *_cache, off_t blockNumber, 46 off_t base, off_t length, int32 transaction); 47 extern void *block_cache_get_writable(void *_cache, off_t blockNumber, 48 int32 transaction); 49 extern void *block_cache_get_empty(void *_cache, off_t blockNumber, 50 int32 transaction); 51 extern const void *block_cache_get_etc(void *_cache, off_t blockNumber, 52 off_t base, off_t length); 53 extern const void *block_cache_get(void *_cache, off_t blockNumber); 54 extern status_t block_cache_set_dirty(void *_cache, off_t blockNumber, 55 bool isDirty, int32 transaction); 56 extern void block_cache_put(void *_cache, off_t blockNumber); 57 58 /* file cache */ 59 extern void *file_cache_create(dev_t mountID, ino_t vnodeID, off_t size, 60 int fd); 61 extern void file_cache_delete(void *_cacheRef); 62 extern status_t file_cache_set_size(void *_cacheRef, off_t size); 63 extern status_t file_cache_sync(void *_cache); 64 extern status_t file_cache_invalidate_file_map(void *_cacheRef, off_t offset, 65 off_t size); 66 67 extern status_t file_cache_read_pages(void *_cacheRef, off_t offset, 68 const iovec *vecs, size_t count, size_t *_numBytes); 69 extern status_t file_cache_write_pages(void *_cacheRef, off_t offset, 70 const iovec *vecs, size_t count, size_t *_numBytes); 71 extern status_t file_cache_read(void *_cacheRef, off_t offset, void *bufferBase, 72 size_t *_size); 73 extern status_t file_cache_write(void *_cacheRef, off_t offset, 74 const void *buffer, size_t *_size); 75 76 #ifdef __cplusplus 77 } 78 #endif 79 80 #endif /* _FS_CACHE_H */ 81