115 lines
4.2 KiB
C
115 lines
4.2 KiB
C
/*
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* Copyright 2004-2008, Haiku Inc. All Rights Reserved.
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* Distributed under the terms of the MIT License.
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*/
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#ifndef _FS_CACHE_H
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#define _FS_CACHE_H
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/*! File System File and Block Caches */
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#include <fs_interface.h>
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/* transaction events */
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enum {
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TRANSACTION_WRITTEN = 0x01,
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TRANSACTION_ABORTED = 0x02,
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TRANSACTION_ENDED = 0x04,
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TRANSACTION_IDLE = 0x08
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};
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/* file map modes */
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enum {
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FILE_MAP_CACHE_ON_DEMAND = 0x01, /* default mode */
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FILE_MAP_CACHE_ALL = 0x02
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};
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typedef void (*transaction_notification_hook)(int32 id, int32 event,
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void *data);
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* transactions */
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extern int32 cache_start_transaction(void *cache);
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extern status_t cache_sync_transaction(void *cache, int32 id);
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extern status_t cache_end_transaction(void *cache, int32 id,
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transaction_notification_hook hook, void *data);
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extern status_t cache_abort_transaction(void *cache, int32 id);
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extern int32 cache_detach_sub_transaction(void *cache, int32 id,
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transaction_notification_hook hook, void *data);
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extern status_t cache_abort_sub_transaction(void *cache, int32 id);
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extern status_t cache_start_sub_transaction(void *cache, int32 id);
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extern status_t cache_add_transaction_listener(void *cache, int32 id,
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int32 events, transaction_notification_hook hook,
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void *data);
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extern status_t cache_remove_transaction_listener(void *cache, int32 id,
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transaction_notification_hook hook, void *data);
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extern status_t cache_next_block_in_transaction(void *cache, int32 id,
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bool mainOnly, long *_cookie, off_t *_blockNumber,
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void **_data, void **_unchangedData);
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extern int32 cache_blocks_in_transaction(void *cache, int32 id);
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extern int32 cache_blocks_in_main_transaction(void *cache, int32 id);
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extern int32 cache_blocks_in_sub_transaction(void *cache, int32 id);
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/* block cache */
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extern void block_cache_delete(void *cache, bool allowWrites);
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extern void *block_cache_create(int fd, off_t numBlocks, size_t blockSize,
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bool readOnly);
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extern status_t block_cache_sync(void *cache);
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extern status_t block_cache_sync_etc(void *cache, off_t blockNumber,
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size_t numBlocks);
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extern void block_cache_discard(void *cache, off_t blockNumber,
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size_t numBlocks);
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extern status_t block_cache_make_writable(void *cache, off_t blockNumber,
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int32 transaction);
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extern void *block_cache_get_writable_etc(void *cache, off_t blockNumber,
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off_t base, off_t length, int32 transaction);
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extern void *block_cache_get_writable(void *cache, off_t blockNumber,
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int32 transaction);
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extern void *block_cache_get_empty(void *cache, off_t blockNumber,
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int32 transaction);
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extern const void *block_cache_get_etc(void *cache, off_t blockNumber,
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off_t base, off_t length);
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extern const void *block_cache_get(void *cache, off_t blockNumber);
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extern status_t block_cache_set_dirty(void *cache, off_t blockNumber,
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bool isDirty, int32 transaction);
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extern void block_cache_put(void *cache, off_t blockNumber);
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/* file cache */
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extern void *file_cache_create(dev_t mountID, ino_t vnodeID, off_t size);
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extern void file_cache_delete(void *cacheRef);
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extern void file_cache_enable(void *cacheRef);
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extern bool file_cache_is_enabled(void *cacheRef);
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extern status_t file_cache_disable(void *cacheRef);
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extern status_t file_cache_set_size(void *cacheRef, off_t size);
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extern status_t file_cache_sync(void *cache);
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extern status_t file_cache_read(void *cacheRef, void *cookie, off_t offset,
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void *bufferBase, size_t *_size);
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extern status_t file_cache_write(void *cacheRef, void *cookie, off_t offset,
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const void *buffer, size_t *_size);
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/* file map */
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extern void *file_map_create(dev_t mountID, ino_t vnodeID, off_t size);
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extern void file_map_delete(void *map);
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extern void file_map_set_size(void *map, off_t size);
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extern void file_map_invalidate(void *map, off_t offset, off_t size);
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extern status_t file_map_set_mode(void *map, uint32 mode);
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extern status_t file_map_translate(void *map, off_t offset, size_t size,
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struct file_io_vec *vecs, size_t *_count, size_t align);
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/* entry cache */
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extern status_t entry_cache_add(dev_t mountID, ino_t dirID, const char* name,
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ino_t nodeID);
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extern status_t entry_cache_remove(dev_t mountID, ino_t dirID,
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const char* name);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _FS_CACHE_H */
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