function lfds711_list_aso_insert

From liblfds.org
Jump to navigation Jump to search

Source Files

└───liblfds711
    ├───inc
    │   └───liblfds711
    │           lfds711_list_addonly_singlylinked_ordered.h
    └───src
        └───llfds711_list_addonly_singlylinked_ordered
                lfds711_list_addonly_singlylinked_ordered_insert.c

Opaque Structures

struct lfds711_list_aso_element;
struct lfds711_list_aso_state;

Prototype

enum lfds711_list_aso_insert_result lfds711_list_aso_insert( struct lfds711_list_aso_state *lasos,
                                                             struct lfds711_list_aso_element *lasoe,
                                                             struct lfds711_list_aso_element **existing_lasoe );

Parameters

struct lfds711_list_aso_state *lasos

A pointer to an initialized struct lfds711_list_aso_state.

struct lfds711_list_aso_element *lasoe

A pointer a user-allocated LFDS711_PAL_ATOMIC_ISOLATION_IN_BYTES aligned struct lfds711_list_aso_element, which will be inserted into the list. Stack declared variables will automatically be correctly aligned by the compiler, due to the information in the structure definitions; nothing has to be done. Heap allocated variables however will by no means be correctly aligned and an aligned malloc must be used.

struct lfds711_list_aso_element **existing_lasoe

If on put the key already exists, *existing_lasoe is set to point to the existing element with that key. This argument can be NULL (and then is unused).

Return Value

The return value is an enum lfds711_list_aso_insert_result.

If the key did not exist in the list, and so was successfully linked, the return value is LFDS711_LIST_ASO_INSERT_RESULT_SUCCESS.

If the key already exists in the list, but LFDS711_LIST_ASO_EXISTING_KEY_OVERWRITE was specified to lfds711_list_aso_init_valid_on_current_logical_core when initializing the list, the return value is LFDS711_LIST_ASO_INSERT_RESULT_SUCCESS_OVERWRITE (and the value in the existing key will have been overwritten with the value in the new key).

If the key already exists in the list, but LFDS711_LIST_ASO_EXISTING_KEY_FAIL was specified to lfds711_list_aso_init_valid_on_current_logical_core when initializing the list, the return value is LFDS711_LIST_ASO_INSERT_RESULT_FAILURE_EXISTING_KEY (and the value in the existing key will be unchanged).

Notes

This function takes a user allocated struct lfds711_list_aso_element, which the user has with the list macros populated with a key (and typically but optionally with a value), and inserts this element into the list, using the key_compare_function callback to compare list element keys to find the correct position in the btree.

If when inserting a new element the key is already present in the list, the argument *existing_lasoe, if not NULL, will be set to point to the existing element.

See Also