backed_block.h revision 411619e921904b896eddae81c086c1f687c8304d 
1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef _BACKED_BLOCK_H_
18#define _BACKED_BLOCK_H_
19
20struct backed_block_list;
21
22typedef void (*data_block_callback_t)(void *priv, int64_t off, void *data,
23		int len);
24typedef void (*data_block_fill_callback_t)(void *priv, int64_t off,
25		unsigned int fill_val, int len);
26typedef void (*data_block_file_callback_t)(void *priv, int64_t off,
27		const char *file, int64_t offset, int len);
28
29void for_each_data_block(struct backed_block_list *b,
30	data_block_callback_t data_func,
31	data_block_file_callback_t file_func,
32	data_block_fill_callback_t fill_func,
33	void *priv, unsigned int);
34
35void queue_data_block(struct backed_block_list *b,void *data, unsigned int len,
36		unsigned int block);
37void queue_fill_block(struct backed_block_list *b,unsigned int fill_val,
38		unsigned int len, unsigned int block);
39void queue_data_file(struct backed_block_list *b,const char *filename,
40		int64_t offset, unsigned int len, unsigned int block);
41
42struct backed_block_list *backed_block_list_new(void);
43void backed_block_list_destroy(struct backed_block_list *b);
44
45#endif
46