ClfsLsnLess function (wdm.h)

The ClfsLsnLess routine determines whether one LSN is less than another LSN. The two LSNs must be from the same stream.

Syntax

CLFSUSER_API BOOLEAN ClfsLsnLess(
  [in] const CLFS_LSN *plsn1,
  [in] const CLFS_LSN *plsn2
);

[in] plsn1

A pointer to a CLFS_LSN structure that supplies one of the LSNs to be compared.

[in] plsn2

A pointer to a CLFS_LSN structure that supplies the other LSN to be compared.

ClfsLsnLess returns TRUE if plsn1 is strictly less than plsn2; otherwise, it returns FALSE.

CLFS_LSN_NULL (the smallest LSN) and CLFS_LSN_INVALID (larger than any valid LSN) are valid arguments to ClfsLsnLess.

LSNs from different streams are not comparable. Do not use ClfsLsnEqual, ClfsLsnLess and the like to compare LSNs from different streams.

For an explanation of CLFS concepts and terminology, see Common Log File System.

Requirement	Value
Minimum supported client	Available in Windows Server 2003 R2, Windows Vista, and later versions of Windows.
Target Platform	Desktop
Header	wdm.h (include Wdm.h)
Library	Clfs.lib
DLL	Clfs.sys
IRQL	Any level