9b906ccf04
parameter during construction). * Doing so will now result in a kernel panic whenever your file system tries to write to a block. git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@18719 a95241bf-73f2-0310-859d-f6bbb57e9c96
66 lines
2.9 KiB
C
66 lines
2.9 KiB
C
/* File System File and Block Caches
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*
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* Copyright 2004-2005, 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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#include <fs_interface.h>
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typedef void (*transaction_notification_hook)(int32 id, 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, 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, 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_next_block_in_transaction(void *_cache, int32 id, uint32 *_cookie,
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off_t *_blockNumber, 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_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, bool readOnly);
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extern status_t block_cache_sync(void *_cache);
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extern status_t block_cache_make_writable(void *_cache, off_t blockNumber, int32 transaction);
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extern void *block_cache_get_writable_etc(void *_cache, off_t blockNumber, off_t base,
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off_t length, int32 transaction);
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extern void *block_cache_get_writable(void *_cache, off_t blockNumber, int32 transaction);
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extern void *block_cache_get_empty(void *_cache, off_t blockNumber, int32 transaction);
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extern const void *block_cache_get_etc(void *_cache, off_t blockNumber, 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, 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(mount_id mountID, vnode_id vnodeID, off_t size, int fd);
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extern void file_cache_delete(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_invalidate_file_map(void *_cacheRef, off_t offset, off_t size);
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extern status_t file_cache_read_pages(void *_cacheRef, off_t offset,
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const iovec *vecs, size_t count, size_t *_numBytes);
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extern status_t file_cache_write_pages(void *_cacheRef, off_t offset,
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const iovec *vecs, size_t count, size_t *_numBytes);
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extern status_t file_cache_read(void *_cacheRef, off_t offset, void *bufferBase, size_t *_size);
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extern status_t file_cache_write(void *_cacheRef, off_t offset, const void *buffer, size_t *_size);
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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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