This source file includes following definitions.
- squashfs_page_actor_init
- squashfs_first_page
- squashfs_next_page
- squashfs_finish_page
- squashfs_first_page
- squashfs_next_page
- squashfs_finish_page
1
2 #ifndef PAGE_ACTOR_H
3 #define PAGE_ACTOR_H
4
5
6
7
8
9 #ifndef CONFIG_SQUASHFS_FILE_DIRECT
10 struct squashfs_page_actor {
11 void **page;
12 int pages;
13 int length;
14 int next_page;
15 };
16
17 static inline struct squashfs_page_actor *squashfs_page_actor_init(void **page,
18 int pages, int length)
19 {
20 struct squashfs_page_actor *actor = kmalloc(sizeof(*actor), GFP_KERNEL);
21
22 if (actor == NULL)
23 return NULL;
24
25 actor->length = length ? : pages * PAGE_SIZE;
26 actor->page = page;
27 actor->pages = pages;
28 actor->next_page = 0;
29 return actor;
30 }
31
32 static inline void *squashfs_first_page(struct squashfs_page_actor *actor)
33 {
34 actor->next_page = 1;
35 return actor->page[0];
36 }
37
38 static inline void *squashfs_next_page(struct squashfs_page_actor *actor)
39 {
40 return actor->next_page == actor->pages ? NULL :
41 actor->page[actor->next_page++];
42 }
43
44 static inline void squashfs_finish_page(struct squashfs_page_actor *actor)
45 {
46
47 }
48 #else
49 struct squashfs_page_actor {
50 union {
51 void **buffer;
52 struct page **page;
53 };
54 void *pageaddr;
55 void *(*squashfs_first_page)(struct squashfs_page_actor *);
56 void *(*squashfs_next_page)(struct squashfs_page_actor *);
57 void (*squashfs_finish_page)(struct squashfs_page_actor *);
58 int pages;
59 int length;
60 int next_page;
61 };
62
63 extern struct squashfs_page_actor *squashfs_page_actor_init(void **, int, int);
64 extern struct squashfs_page_actor *squashfs_page_actor_init_special(struct page
65 **, int, int);
66 static inline void *squashfs_first_page(struct squashfs_page_actor *actor)
67 {
68 return actor->squashfs_first_page(actor);
69 }
70 static inline void *squashfs_next_page(struct squashfs_page_actor *actor)
71 {
72 return actor->squashfs_next_page(actor);
73 }
74 static inline void squashfs_finish_page(struct squashfs_page_actor *actor)
75 {
76 actor->squashfs_finish_page(actor);
77 }
78 #endif
79 #endif