InsertHeadList function (wdm.h)

The InsertHeadList routine inserts an entry at the head of a doubly linked list of LIST_ENTRY structures.

Syntax

void InsertHeadList(
  [in, out] PLIST_ENTRY                  ListHead,
  [in, out] __drv_aliasesMem PLIST_ENTRY Entry
);

Parameters

[in, out] ListHead

Pointer to the LIST_ENTRY structure that represents the head of the list.

[in, out] Entry

Pointer to a LIST_ENTRY structure that represents the entry to be inserted into the list.

Return value

None

Remarks

InsertHeadList updates ListHead->Flink to point to Entry. It updates Entry->Flink to point to the old first entry in the list, and sets Entry->Blink to ListHead. The Blink field of the original first entry is also updated to point to Entry.

For information about using this routine when implementing a doubly linked list, see Singly and Doubly Linked Lists.

Callers of InsertHeadList can be running at any IRQL. If InsertHeadList is called at IRQL >= DISPATCH_LEVEL, the storage for ListHead and the list entries must be resident.

Requirements

See also

ExInterlockedInsertHeadList

InitializeListHead

InsertTailList

IsListEmpty

RemoveHeadList

RemoveTailList