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/*++
Copyright (c) Microsoft Corporation. All rights reserved.
Module Name:
Fixsession.h
Abstract:
This module contains the type definitions of the fix logic of the Umdf Gnss Driver.
Environment:
Windows User-Mode Driver Framework
--*/
#pragma once
//
// This class implements the Fix sessions and contains logic to provide position within GNSS driver.
//
class CFixSession
{
public:
CFixSession();
~CFixSession();
void AcquireSingleFix();
NTSTATUS Initialize(_In_ WDFQUEUE Queue);
NTSTATUS StartAcquiringFix(_In_ PGNSS_FIXSESSION_PARAM FixSessionParameters);
NTSTATUS StopAcquiringFix(_In_ PGNSS_STOPFIXSESSION_PARAM StopFixSessionParam);
NTSTATUS ModifyAcquiringFix(_In_ PGNSS_FIXSESSION_PARAM ModifyFixSessionParam);
NTSTATUS GetFix(_In_ WDFREQUEST Request);
NTSTATUS UpdateCurrentPosition(_In_ PGNSS_FIXDATA GnssFix);
NTSTATUS RetrievePosition(_Inout_ PGNSS_FIXDATA GnssFixData);
NTSTATUS RetrievePositionFromPredefinedValue(_Out_ PGNSS_FIXDATA GnssFixData);
private:
enum STATE
{
ACQUIRING = 0,
STOPPED
};
ULONG _Id = INVALID_SESSION_ID;
STATE _State = STOPPED;
GNSS_FIXSESSION_PARAM _FixParameter = {};
WDFQUEUE _FixAcquisitionRequestQueue = nullptr;
bool _HasCachedFix = false;
GNSS_FIXDATA _GnssPosition = {};
HANDLE _StopFixEvent = nullptr;
PTP_WORK _ThreadpoolWork = nullptr;
CRITICAL_SECTION _Lock;
NTSTATUS CompleteRequestWithGnssFix(_In_ WDFREQUEST Request, PGNSS_FIXDATA GnssFix);
NTSTATUS ReportGnssFix(_In_ PGNSS_FIXDATA GnssFix);
};
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