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Add list_for_each_entry_safe.

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This commit is contained in:
Michael Brown 2006-05-16 14:14:31 +00:00
parent ceba6ecb75
commit 7cd0390013
1 changed files with 16 additions and 1 deletions
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17
src/include/gpxe/list.h
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@ -138,8 +138,23 @@ static inline int list_empty ( const struct list_head *head ) {
* @v member The name of the list_struct within the struct
*/
#define list_for_each_entry( pos, head, member ) \
for ( pos = list_entry ( (head)->next, typeof ( *pos ), member); \
for ( pos = list_entry ( (head)->next, typeof ( *pos ), member ); \
&pos->member != (head); \
pos = list_entry ( pos->member.next, typeof ( *pos ), member ) )
/**
* Iterate over entries in a list, safe against deletion of entries
*
* @v pos The type * to use as a loop counter
* @v tmp Another type * to use for temporary storage
* @v head The head for your list
* @v member The name of the list_struct within the struct
*/
#define list_for_each_entry_safe( pos, tmp, head, member ) \
for ( pos = list_entry ( (head)->next, typeof ( *pos ), member ), \
tmp = list_entry ( pos->member.next, typeof ( *tmp ), member ); \
&pos->member != (head); \
pos = tmp, \
tmp = list_entry ( tmp->member.next, typeof ( *tmp ), member ) )
#endif /* _GPXE_LIST_H */