IoSetActivityIdThread function (ntddk.h)

The IoSetActivityIdThread routine associates an activity ID with the current thread. Drivers should use this routine when they are tracing aware and are issuing I/O on a worker thread.

Syntax

LPCGUID IoSetActivityIdThread(
  LPCGUID ActivityId
);

Parameters

ActivityId

The activity ID provided by caller.

Return value

The activity ID that was previously set on the thread. Drivers must call IoClearActivityIdThread with this pointer when tracing is completed within the same thread context.

Remarks

Drivers that use I/O work items do not need to call this routine because the I/O subsystem takes care of propagating activity IDs to threads in that case.

Requirements