1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
|
/* Linked list help functions used by driver manager.
*
* COPYRIGHT (c) 2009.
* Cobham Gaisler AB.
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*/
/*
* Help functions for the Driver Manager. Implements a singly linked list
* with head and tail pointers for fast insertions/deletions to head and
* tail in list.
*/
#ifndef _DRVIVER_MANAGER_LIST_H_
#define _DRVIVER_MANAGER_LIST_H_
#ifdef __cplusplus
extern "C" {
#endif
/*! List description, Singly link list with head and tail pointers. */
struct drvmgr_list {
void *head; /*!< First entry in queue */
void *tail; /*!< Last entry in queue */
int ofs; /*!< Offset into head and tail to find next field */
};
/* Static initialization of list */
#define LIST_INITIALIZER(type, field) {NULL, NULL, offsetof(type, field)}
/* Return the first element in list */
#define LIST_HEAD(list, type) ((type *)(list)->head)
/* Return the last element in list */
#define LIST_TAIL(list, type) ((type *)(list)->tail)
/* Get the next pointer of an entry */
#define LIST_FIELD(list, entry) (*(void **)((char *)(entry) + (list)->ofs))
/* Return the next emlement in list */
#define LIST_NEXT(list, entry, type) ((type *)(LIST_FIELD(list, entry)))
/* Iterate through all entries in list */
#define LIST_FOR_EACH(list, entry, type) \
for (entry = LIST_HEAD(list, type); \
entry; \
entry = LIST_NEXT(list, entry, type))
/*! Initialize a list during runtime
*
* \param list The list to initialize
* \param offset The number of bytes into the entry structure the next pointer
* is found
*/
extern void drvmgr_list_init(struct drvmgr_list *list, int offset);
/*! Clear list */
extern void drvmgr_list_empty(struct drvmgr_list *list);
/*! Add entry to front of list */
extern void drvmgr_list_add_head(struct drvmgr_list *list, void *entry);
/*! Add entry to end of list */
extern void drvmgr_list_add_tail(struct drvmgr_list *list, void *entry);
/*! Remove entry from front of list */
extern void drvmgr_list_remove_head(struct drvmgr_list *list);
/*! Remove entry from anywhere in list */
extern void drvmgr_list_remove(struct drvmgr_list *list, void *entry);
#ifdef __cplusplus
}
#endif
#endif
|
