Manual Pages for UNIX Operating System command usage for man list_head

Kernel Functions for Drivers                      list_create(9F)



NAME
     list_create,        list_destroy,         list_insert_after,
     list_insert_before,    list_insert_head,   list_insert_tail,
     list_remove, list_remove_head, list_remove_tail,  list_head,
     list_tail,      list_next,     list_prev,     list_is_empty,
     list_link_init,      list_link_active,       list_move_tail,
     list_link_replace - list functions

SYNOPSIS
     #include 

     void list_create(list_t * list, size_t size, size_t offset);


     void list_destroy(list_t * list);


     void list_insert_after(list_t * list, void *reference_item,
          void *new_item);


     void list_insert_before(list_t * list, void *reference_item,
          void *new_item);


     void list_insert_head(list_t * list*, void *new_item);


     void list_insert_tail(list_t * list, void *new_item);


     void list_remove(list_t * list, void *item);


     void *list_remove_head(list_t * list);


     void *list_remove_tail(list_t * list);


     void *list_head(list_t * list);


     void *list_tail(list_t * list);


     void *list_next(list_t * list, void *reference_item);


     void *list_prev(list_t * list, void *reference_item);





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Kernel Functions for Drivers                      list_create(9F)



     int list_is_empty(list_t * list);


     void list_link_init(list_node_t *node);


     int list_link_active(list_node_t *node);


     void list_move_tail(list_t *dst, list_t *src);


     void list_link_replace(list_node_t *node1, list_node_t *node2);


DESCRIPTION
     The list_create()  function  initializes  a  new  list.  The
     driver supplies the storage for the list handle, the size of
     an individual element,  and  the  offset  of  a  list_node_t
     within the element to use for the links of the list.


     The  list_destroy()  function  destroys  the  list   handle,
     including  freeing  any  resources that may have been inter-
     nally allocated for the list. The list must  be  empty  when
     this function is called.


     The list_insert_after() and  list_insert_before()  functions
     insert  new_item into the linked list at a location after or
     before the reference item, which  must  already  be  on  the
     list.


     The  list_insert_head()  and  list_insert_tail()   functions
     insert  the  new_item on the list at either the head or tail
     of the list.  (The head is the first item, the tail  is  the
     last item).


     The list_remove() function removes the item from the list.


     The  list_remove_head()  and  list_remove_tail()   functions
     remove  the  head (first) or tail (last) item from the list.
     The item removed is returned to the caller. If the  list  is
     empty  when  these  functions  are called, then no change is
     made and NULL is returned to the caller.


     The list_head() and list_tail() functions simply return  the
     head  (first)  or  tail  (last)  item  on the list.  NULL is



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Kernel Functions for Drivers                      list_create(9F)



     returned if the list is empty.


     The list_next() and list_prev() functions return the next or
     previous  item  in the list, relative to the named reference
     item which must be linked on the list.


     The list_is_empty() function returns 0 if the list has items
     in it, or non-zero otherwise.


     The list_link_init() function initializes  the  list_node_t.
     It is functionally equivalent to bzero(node, sizeof(*node));


     The list_link_active() function returns non-zero if the node
     is on an active list.


     The list_move_tail() function is used to append the items on
     the  src  list  to  the end of the dst list. It is mandatory
     that the two lists were initialized using identical size and
     offset  parameters.  Upon  completion,  the src list will be
     empty.


     The list_link_replace() function swaps two items on a  list.
     Note  that  the  items  need  not  be  on the same list, but
     extreme care must be used to ensure that both lists are pro-
     tected from concurrent accesses and that the lists were ini-
     tialized with identical size and offset parameters.

ATTRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:



     ____________________________________________________________
    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    |_____________________________|_____________________________|
    | Interface Stability         | Committed                   |
    |_____________________________|_____________________________|


SEE ALSO
     attributes(5)







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