Ejemplo n.º 1
0
// This routine is called by the framework when the PnP manager is revoking
// ownership of our resources. This may be in response to either
// IRP_MN_STOP_DEVICE or IRP_MN_REMOVE_DEVICE. This routine is responsible for
// performing cleanup of resources allocated in PrepareHardware callback.
// This callback is invoked before passing  the request down to the lower driver.
// This routine will also be invoked by the framework if the prepare hardware
// callback returns a failure.
NTSTATUS
CustomSensorDevice::OnReleaseHardware(
    _In_ WDFDEVICE Device,                       // Supplies a handle to the framework device object
    _In_ WDFCMRESLIST /*ResourcesTranslated*/)   // Supplies a handle to a collection of framework
// resource objects. This collection identifies the translated
// (system-physical) hardware resources that have been assigned to the
// device. The resources appear from the CPU's point of view.
{
    PHardwareSimulator pSimulator = nullptr;
    PCustomSensorDevice pDevice = nullptr;
    SENSOROBJECT SensorInstance = nullptr;
    ULONG SensorInstanceCount = 1;    // only expect 1 sensor instance
    NTSTATUS Status = STATUS_SUCCESS;

    SENSOR_FunctionEnter();

    // Get sensor instance
    Status = SensorsCxDeviceGetSensorList(Device, &SensorInstance, &SensorInstanceCount);
    if (!NT_SUCCESS(Status) ||
            0 == SensorInstanceCount ||
            NULL == SensorInstance)
    {
        Status = STATUS_INVALID_PARAMETER;
        TraceError("CSTM %!FUNC! SensorsCxDeviceGetSensorList failed %!STATUS!", Status);
        goto Exit;
    }

    pDevice = GetCustomSensorContextFromSensorInstance(SensorInstance);
    if (nullptr == pDevice)
    {
        Status = STATUS_INVALID_PARAMETER;
        TraceError("CSTM %!FUNC! GetCustomSensorContextFromSensorInstance failed %!STATUS!", Status);
        goto Exit;
    }

    // Delete lock
    if (pDevice->m_Lock)
    {
        WdfObjectDelete(pDevice->m_Lock);
        pDevice->m_Lock = NULL;
    }

    // Cleanup the CO2 simulator
    pSimulator = GetHardwareSimulatorContextFromInstance(pDevice->m_SimulatorInstance);
    if (nullptr == pSimulator)
    {
        Status = STATUS_INSUFFICIENT_RESOURCES;
        TraceError("CSTM %!FUNC! GetHardwareSimulatorContextFromInstance failed %!STATUS!", Status);
        goto Exit;
    }

    pSimulator->Cleanup();

    // Delete hardware simulator instance
    if (NULL != pDevice->m_SimulatorInstance)
    {
        WdfObjectDelete(pDevice->m_SimulatorInstance);
        pDevice->m_SimulatorInstance = NULL;
    }

    // Delete sensor instance
    if (NULL != pDevice->m_SensorInstance)
    {
        WdfObjectDelete(pDevice->m_SensorInstance);
    }

Exit:
    SENSOR_FunctionExit(Status);
    return Status;
}
Ejemplo n.º 2
0
// This routine is called by the framework when the PnP manager is revoking
// ownership of our resources. This may be in response to either
// IRP_MN_STOP_DEVICE or IRP_MN_REMOVE_DEVICE. This routine is responsible for
// performing cleanup of resources allocated in PrepareHardware callback.
// This callback is invoked before passing  the request down to the lower driver.
// This routine will also be invoked by the framework if the prepare hardware
// callback returns a failure.
//
// Argument:
//      Device: IN: Supplies a handle to the framework device object
//      ResourcesTranslated: IN: Supplies a handle to a collection of framework
//          resource objects. This collection identifies the translated
//          (system-physical) hardware resources that have been assigned to the
//          device. The resources appear from the CPU's point of view.
//
// Return Value:
//      NTSTATUS code
//------------------------------------------------------------------------------
NTSTATUS
PedometerDevice::OnReleaseHardware(
    _In_ WDFDEVICE Device,                      // Supplies a handle to the framework device object
    _In_ WDFCMRESLIST /*ResourcesTranslated*/)  // Supplies a handle to a collection of framework
                                                // resource objects. This collection identifies the translated
                                                // (system-physical) hardware resources that have been assigned to the
                                                // device. The resources appear from the CPU's point of view.
{
    PHardwareSimulator pSimulator = nullptr;
    PPedometerDevice pDevice = nullptr;
    SENSOROBJECT SensorInstance = nullptr;
    ULONG SensorInstanceCount = 1;    // only expect 1 sensor instance
    NTSTATUS Status = STATUS_SUCCESS;

    SENSOR_FunctionEnter();

    // Get sensor instance
    Status = SensorsCxDeviceGetSensorList(Device, &SensorInstance, &SensorInstanceCount);
    if (!NT_SUCCESS(Status) ||
        0 == SensorInstanceCount ||
        NULL == SensorInstance)
    {
        Status = STATUS_INVALID_PARAMETER;
        TraceError("PED %!FUNC! SensorsCxDeviceGetSensorList failed %!STATUS!", Status);
        goto Exit;
    }

    pDevice = GetPedometerContextFromSensorInstance(SensorInstance);
    if (nullptr == pDevice)
    {
        Status = STATUS_INVALID_PARAMETER;
        TraceError("PED %!FUNC! GetPedometerContextFromSensorInstance failed %!STATUS!", Status);
        goto Exit;
    }

    pSimulator = GetHardwareSimulatorContextFromInstance(pDevice->m_SimulatorInstance);
    if (nullptr == pSimulator)
    {
        Status = STATUS_INSUFFICIENT_RESOURCES;
        TraceError("PED %!FUNC! GetHardwareSimulatorContextFromInstance failed %!STATUS!", Status);
        goto Exit;
    }

    // Close handle to history retrieval thread
    if (NULL != pDevice->m_hThread)
    {
        pSimulator->SignalReadCancellation();

        DWORD result = WaitForSingleObjectEx(pDevice->m_hThread, Pedometer_TimeoutForHistoryThread_Ms, FALSE);
        if (WAIT_OBJECT_0 != result)
        {
            TraceError("PED %!FUNC! WaitForSingleObjectEx failed with error %d", result);
            goto Exit;
        }

        CloseHandle(pDevice->m_hThread);
        pDevice->m_hThread = NULL;
    }


    // Delete lock
    if (NULL != pDevice->m_Lock)
    {
        WdfObjectDelete(pDevice->m_Lock);
        pDevice->m_Lock = NULL;
    }    
    
    // Cleanup the pedometer simulator
    pSimulator->Cleanup();

    // Delete hardware simulator instance
    if (NULL != pDevice->m_SimulatorInstance)
    {
        WdfObjectDelete(pDevice->m_SimulatorInstance);
        pDevice->m_SimulatorInstance = NULL;
    }

    // Delete sensor instance
    if (NULL != pDevice->m_SensorInstance)
    {
        WdfObjectDelete(pDevice->m_SensorInstance);
    }
  
Exit:
    SENSOR_FunctionExit(Status);
    return Status;
}