mirror of
https://github.com/team-infusion-developers/android_kernel_samsung_msm8976.git
synced 2024-10-20 02:19:01 +00:00
e45b1be8bc
Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
124 lines
3.1 KiB
C
124 lines
3.1 KiB
C
#ifndef _LISTHELP_H
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#define _LISTHELP_H
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#include <linux/config.h>
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#include <linux/list.h>
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/* Header to do more comprehensive job than linux/list.h; assume list
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is first entry in structure. */
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/* Return pointer to first true entry, if any, or NULL. A macro
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required to allow inlining of cmpfn. */
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#define LIST_FIND(head, cmpfn, type, args...) \
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({ \
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const struct list_head *__i, *__j = NULL; \
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\
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ASSERT_READ_LOCK(head); \
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list_for_each(__i, (head)) \
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if (cmpfn((const type)__i , ## args)) { \
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__j = __i; \
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break; \
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} \
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(type)__j; \
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})
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#define LIST_FIND_W(head, cmpfn, type, args...) \
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({ \
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const struct list_head *__i, *__j = NULL; \
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\
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ASSERT_WRITE_LOCK(head); \
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list_for_each(__i, (head)) \
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if (cmpfn((type)__i , ## args)) { \
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__j = __i; \
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break; \
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} \
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(type)__j; \
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})
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/* Just like LIST_FIND but we search backwards */
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#define LIST_FIND_B(head, cmpfn, type, args...) \
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({ \
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const struct list_head *__i, *__j = NULL; \
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\
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ASSERT_READ_LOCK(head); \
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list_for_each_prev(__i, (head)) \
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if (cmpfn((const type)__i , ## args)) { \
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__j = __i; \
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break; \
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} \
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(type)__j; \
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})
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static inline int
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__list_cmp_same(const void *p1, const void *p2) { return p1 == p2; }
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/* Is this entry in the list? */
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static inline int
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list_inlist(struct list_head *head, const void *entry)
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{
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return LIST_FIND(head, __list_cmp_same, void *, entry) != NULL;
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}
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/* Delete from list. */
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#ifdef CONFIG_NETFILTER_DEBUG
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#define LIST_DELETE(head, oldentry) \
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do { \
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ASSERT_WRITE_LOCK(head); \
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if (!list_inlist(head, oldentry)) \
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printk("LIST_DELETE: %s:%u `%s'(%p) not in %s.\n", \
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__FILE__, __LINE__, #oldentry, oldentry, #head); \
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else list_del((struct list_head *)oldentry); \
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} while(0)
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#else
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#define LIST_DELETE(head, oldentry) list_del((struct list_head *)oldentry)
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#endif
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/* Append. */
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static inline void
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list_append(struct list_head *head, void *new)
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{
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ASSERT_WRITE_LOCK(head);
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list_add((new), (head)->prev);
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}
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/* Prepend. */
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static inline void
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list_prepend(struct list_head *head, void *new)
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{
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ASSERT_WRITE_LOCK(head);
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list_add(new, head);
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}
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/* Insert according to ordering function; insert before first true. */
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#define LIST_INSERT(head, new, cmpfn) \
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do { \
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struct list_head *__i; \
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ASSERT_WRITE_LOCK(head); \
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list_for_each(__i, (head)) \
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if ((new), (typeof (new))__i) \
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break; \
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list_add((struct list_head *)(new), __i->prev); \
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} while(0)
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/* If the field after the list_head is a nul-terminated string, you
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can use these functions. */
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static inline int __list_cmp_name(const void *i, const char *name)
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{
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return strcmp(name, i+sizeof(struct list_head)) == 0;
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}
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/* Returns false if same name already in list, otherwise does insert. */
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static inline int
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list_named_insert(struct list_head *head, void *new)
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{
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if (LIST_FIND(head, __list_cmp_name, void *,
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new + sizeof(struct list_head)))
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return 0;
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list_prepend(head, new);
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return 1;
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}
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/* Find this named element in the list. */
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#define list_named_find(head, name) \
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LIST_FIND(head, __list_cmp_name, void *, name)
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#endif /*_LISTHELP_H*/
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