NtDoc

No description available.

Edit description on GitHub

Windows Driver Kit DDI reference (ni-gnssdriver-ioctl_gnss_stop_fixsession)

IOCTL_GNSS_STOP_FIXSESSION IOCTL

Description

The IOCTL_GNSS_STOP_FIXSESSION control code is used by the GNSS adapter to stop an active fix session.

Parameters

Major code

Input buffer

A pointer to a GNSS_STOPFIXSESSION_PARAM structure.

Input buffer length

Set to sizeof(GNSS_STOPFIXSESSION_PARAM).

Output buffer

Set to NULL.

Output buffer length

Set to 0.

Input/output buffer

Input/output buffer length

Status block

Irp->IoStatus.Status is set to STATUS_SUCCESS if the request is successful. Otherwise, Status to the appropriate error condition as a NTSTATUS code.

Remarks

The driver sets an NTSTATUS value to indicate one of the following results.

The fix session successfully stopped.
The fix session is already stopped or is not active.

GNSS adapter notes

The GNSS adapter always issues a stop fix for every successful start fix. If multi-session support is not present, the GNSS adapter stops any active fix session of the same type before issuing a new start fix request.

GNSS driver notes

The GNSS driver must cancel/stop all pending fix requests and then complete the I/O so that when this call returns, the adapter does not receive any fix data pertaining to the stopped session.

If no other fix sessions are active, the GNSS driver should keep the GNSS engine in a cold state.

IOCTL_GNSS_STOP_FIXSESSION - NtDoc