RtlFirstEntrySList function (winnt.h)

Retrieves the first entry in a singly linked list. Access to the list is synchronized on a multiprocessor system.

NTSYSAPI PSLIST_ENTRY RtlFirstEntrySList(
  [in] const SLIST_HEADER *ListHead
);

[in] ListHead

A pointer to an SLIST_HEADER structure that represents the head of a singly linked list. This structure is for system use only.

The list must be previously initialized with the InitializeSListHead function.

The return value is a pointer to the first entry in the list. If the list is empty, the return value is NULL.

Interlocked Singly Linked Lists