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include/nuttx/list.h: support list entry macro

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Signed-off-by: Junbo Zheng <zhengjunbo1@xiaomi.com>
This commit is contained in:
Junbo Zheng 2022-08-13 16:35:59 +08:00 committed by Petro Karashchenko
parent d252b0b430
commit c947ddd441
1 changed files with 31 additions and 0 deletions
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31
include/nuttx/list.h
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@ -40,6 +40,37 @@
#define list_add_after(entry, new_entry) list_add_head(entry, new_entry)
#define list_add_before(entry, new_entry) list_add_tail(entry, new_entry)
/**
* list_entry - get the struct for this entry
* @ptr: the &struct list_head pointer.
* @type: the type of the struct this is embedded in.
* @member: the name of the list_head within the struct.
*/
#define list_entry(ptr, type, member) \
container_of(ptr, type, member)
/**
* list_first_entry - get the first element from a list
* @ptr: the list head to take the element from.
* @type: the type of the struct this is embedded in.
* @member: the name of the list_head within the struct.
*
* Note, that list is expected to be not empty.
*/
#define list_first_entry(ptr, type, member) \
list_entry((ptr)->next, type, member)
/**
* list_last_entry - get the last element from a list
* @ptr: the list head to take the element from.
* @type: the type of the struct this is embedded in.
* @member: the name of the list_head within the struct.
*
* Note, that list is expected to be not empty.
*/
#define list_last_entry(ptr, type, member) \
list_entry((ptr)->prev, type, member)
#define list_remove_head_type(list, type, element) (\
{\
FAR struct list_node *__nod = list_remove_head(list);\