The ExQueryDepthSList routine returns the number of entries currently in a given sequenced singly linked list.

USHORT 
  ExQueryDepthSList(
    IN PSLIST_HEADER  SListHead
    );

Parameters

SListHead

A pointer to the SLIST_HEADER structure that serves as the header for the sequenced singly linked list. SListHead must have been initialized by calling ExInitializeSListHead.

Return Value

ExQueryDepthSList returns the current number of entries in the list.

Comments

For more information about using this routine to implement a sequenced singly linked list, see Singly and Doubly Linked Lists.

Requirements

IRQL: <=DISPATCH_LEVEL

Headers: Declared in Wdm.h. Include Wdm.h, Ntddk.h, or Ntifs.h.

See Also

ExInitializeSListHead, ExInterlockedPushEntrySList, ExInterlockedPopEntrySList