// ntddk.h

NTSTATUS IoDecrementKeepAliveCount(
  [in, out] PFILE_OBJECT FileObject,
  [in, out] PEPROCESS    Process
);
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Windows Driver Kit DDI reference (nf-ntddk-iodecrementkeepalivecount)

IoDecrementKeepAliveCount function

Description

The IoDecrementKeepAliveCount routine decrements a reference count associated with a Windows app on a specific device. This routine is called by a kernel mode driver when the app's I/O process has completed. If the app's reference count drops to 0, Windows can suspend the app.

Parameters

`FileObject` [in, out]

The file object handle to the device.

`Process` [in, out]

The process associated with the device.

Return value

This routine returns STATUS_SUCCESS on success, or the appropriate NTSTATUS error code on failure. NTSTATUS error codes are defined in Ntstatus.h.

View the official Windows Driver Kit DDI reference