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Diffstat (limited to 'gpio/samples/simdeviceumdf/device.cpp')
| -rw-r--r-- | gpio/samples/simdeviceumdf/device.cpp | 1106 |
1 files changed, 0 insertions, 1106 deletions
diff --git a/gpio/samples/simdeviceumdf/device.cpp b/gpio/samples/simdeviceumdf/device.cpp deleted file mode 100644 index 0ced0bd1..00000000 --- a/gpio/samples/simdeviceumdf/device.cpp +++ /dev/null @@ -1,1106 +0,0 @@ -/*++ - -Copyright (c) 1990-2010 Microsoft Corporation - -Module Name: - - Device.cpp - -Abstract: - - This is a simple UMDF device driver that consumes GPIO pins for I/O and interrupt. - - -Environment: - - UMDF - ---*/ - -// -// Inlcude the below set of headers to get the CM_RESOURCE_ definitions -// - - -#include "internal.h" - -DEFINE_GUID (GUID_DEVINTERFACE_ECHO, - 0xcdc35b6e, 0xbe4, 0x4936, 0xbf, 0x5f, 0x55, 0x37, 0x38, 0xa, 0x7c, 0x1a); -// {CDC35B6E-0BE4-4936-BF5F-5537380A7C1A} - - -HRESULT -CSimdevice::CreateInstance( - _In_ IWDFDriver *FxDriver, - _In_ IWDFDeviceInitialize * FxDeviceInit, - _Out_ PCSimdevice *Device - ) -/*++ - - Routine Description: - - This method creates and initializs an instance of the driver's - device callback object. - - Arguments: - - FxDeviceInit - the settings for the device. - - Device - a location to store the referenced pointer to the device object. - - Return Value: - - Status - ---*/ -{ - PCSimdevice device; - HRESULT hr; - - // - // Allocate a new instance of the device class. - // - - device = new CSimdevice(); - - if (NULL == device) { - return E_OUTOFMEMORY; - } - - // - // Initialize the instance. - // - - hr = device->Initialize(FxDriver, FxDeviceInit); - - if (SUCCEEDED(hr)) { - *Device = device; - } - else { - device->Release(); - } - - return hr; -} - -HRESULT -CSimdevice::Initialize( - _In_ IWDFDriver * FxDriver, - _In_ IWDFDeviceInitialize * FxDeviceInit - ) - -/*++ - - Routine Description: - - This method initializes the device callback object and creates the - partner device object. - - The method should perform any device-specific configuration that: - * could fail (these can't be done in the constructor) - * must be done before the partner object is created -or- - * can be done after the partner object is created and which aren't - influenced by any device-level parameters the parent (the driver - in this case) might set. - - Arguments: - - FxDeviceInit - the settings for this device. - - Return Value: - - status. - ---*/ -{ - IWDFDevice *fxDevice; - IWDFDeviceInitialize2 *fxDeviceInit2; - HRESULT hr; - - // - // Configure things like the locking model before we go to create our - // partner device. - // - - // - // Set no locking unless you need an automatic callbacks synchronization - // - - FxDeviceInit->SetLockingConstraint(None); - - // - // Create a new FX device object and assign the new callback object to - // handle any device level events that occur. - // - - // - // Set retrieval mode to direct I/O. This needs to be done before the call - // to CreateDevice. - // - - FxDeviceInit->QueryInterface(IID_PPV_ARGS(&fxDeviceInit2)); - - if (fxDeviceInit2 == NULL) { - hr = E_FAIL; - return hr; - } - - fxDeviceInit2->SetIoTypePreference(WdfDeviceIoBufferRetrievalDeferred, - WdfDeviceIoDirect, - WdfDeviceIoDirect); - - SAFE_RELEASE(fxDeviceInit2); - - // - // QueryIUnknown references the IUnknown interface that it returns - // (which is the same as referencing the device). We pass that to - // CreateDevice, which takes its own reference if everything works. - // - - { - IUnknown *unknown = this->QueryIUnknown(); - - hr = FxDriver->CreateDevice(FxDeviceInit, unknown, &fxDevice); - - unknown->Release(); - } - - // - // If that succeeded then set our FxDevice member variable. - // - - if (SUCCEEDED(hr)) { - m_FxDevice = fxDevice; - - // - // Drop the reference we got from CreateDevice. Since this object - // is partnered with the framework object they have the same - // lifespan - there is no need for an additional reference. - // - - fxDevice->Release(); - } - - return hr; -} - -HRESULT -CSimdevice::Configure( - VOID - ) -/*++ - - Routine Description: - - This method is called after the device callback object has been initialized - and returned to the driver. It would setup the device's queues and their - corresponding callback objects. - - Arguments: - - FxDevice - the framework device object for which we're handling events. - - Return Value: - - status - ---*/ -{ - PCSimdeviceQueue defaultQueue; - - HRESULT hr; - - hr = CSimdeviceQueue::CreateInstance(m_FxDevice, &defaultQueue); - - if (FAILED(hr)) { - return hr; - } - - hr = defaultQueue->Configure(); - - if (SUCCEEDED(hr)) { - // - // In case of success store defaultQueue in our member - // The reference is transferred to m_DefaultQueue - // - - m_Queue = defaultQueue; - } - else { - // - // In case of failure release the reference - // - - defaultQueue->Release(); - } - - if (SUCCEEDED(hr)) { - hr = m_FxDevice->CreateDeviceInterface(&GUID_DEVINTERFACE_ECHO, - NULL); - } - - return hr; -} - -HRESULT -CSimdevice::QueryInterface( - _In_ REFIID InterfaceId, - _Out_ PVOID *Object - ) -/*++ - - Routine Description: - - This method is called to get a pointer to one of the object's callback - interfaces. - - Since the sample driver doesn't support any of the device events, this - method simply calls the base class's BaseQueryInterface. - - If the sample is extended to include device event interfaces then this - method must be changed to check the IID and return pointers to them as - appropriate. - - Arguments: - - InterfaceId - the interface being requested - - Object - a location to store the interface pointer if successful - - Return Value: - - S_OK or E_NOINTERFACE - ---*/ -{ - HRESULT hr; - - if (IsEqualIID(InterfaceId, __uuidof(IPnpCallbackSelfManagedIo))) { - *Object = QueryIPnpCallbackSelfManagedIo(); - hr = S_OK; - } else if (IsEqualIID(InterfaceId, __uuidof(IPnpCallbackHardware2))) { - *Object = QueryIPnpCallbackHardware2(); - hr = S_OK; - } else if (IsEqualIID(InterfaceId, __uuidof(IPnpCallback))) { - *Object = QueryIPnpCallback(); - hr = S_OK; - } else { - hr = CUnknown::QueryInterface(InterfaceId, Object); - } - - return hr; -} - -HRESULT -CSimdevice::OnSelfManagedIoInit( - _In_ IWDFDevice * pWdfDevice - ) -/*++ - - Routine Description: - - This method is called to allow driver to initialize any resources - that driver might need to process I/O. - - Echo driver needs a thread to process completions. We initialize - this thread here - - Arguments: - - pWdfDevice - framework device object for which to initialze resources - - Return Value: - - S_OK in case of success - HRESULT correponding to error returned by CreateThread, in case of failure - ---*/ -{ - HRESULT hr = S_OK; - - UNREFERENCED_PARAMETER(pWdfDevice); - - - m_ThreadHandle = CreateThread( NULL, // Default Security Attrib. - 0, // Initial Stack Size, - CSimdeviceQueue::CompletionThread, // Thread Func - (LPVOID)m_Queue, // Arg to Thread Func is Queue - 0, // Creation Flags - NULL ); // Don't need the Thread Id. - - if (m_ThreadHandle == NULL) { - hr = HRESULT_FROM_WIN32(GetLastError()); - } - - return hr; -} - -void -CSimdevice::OnSelfManagedIoCleanup( - _In_ IWDFDevice * pWdfDevice - ) -/*++ - - Routine Description: - - This method is called to allow driver to cleanup any resources - that driver allocated to process I/O. - - It is critical that, in this routine driver wait for all of the - threads which it created to exit. Otherwise those threads could - continue to execute when framework unloads the driver which - would lead to a crash. - - Echo driver created a thread to handle completions. We wait for - that thread to exit in this routine - - Arguments: - - pWdfDevice - framework device object for which to cleanup resources - - Return Value: - - None - ---*/ -{ - // - // Kill the thread and - // wait for the thread to die. - // - - UNREFERENCED_PARAMETER(pWdfDevice); - - if (m_ThreadHandle) { - - // - // Ask queue to set terminate flag which will make - // the thread exit - // - - m_Queue->SetExitThread(); - - // - // Wait for the thread to exit - // - - WaitForSingleObject(m_ThreadHandle, INFINITE); - - // - // Close the thread handle - // - - CloseHandle(m_ThreadHandle); - m_ThreadHandle = NULL; - } - - // - // Release the reference we took on the queue callback object - // to keep it alive until the thread exits - // - - SAFE_RELEASE(m_Queue); -} - - -HRESULT -CSimdevice::OnPrepareHardware( - _In_ IWDFDevice3 * pWdfDevice, - _In_ IWDFCmResourceList * pWdfResourcesRaw, - _In_ IWDFCmResourceList * pWdfResourcesTranslated - ) -/*++ - -Routine Description: - - This routine is called by WUDF to initialize hardware resources (e.g. interrupts, - IO resources) - -Arguments: - - pWdfDevice - pointer to an IWDFDevice object for the device - - pWdfResourcesRaw - Supplies a pointer to a collection of framework resource - objects. This collection identifies the raw (bus-relative) hardware - resources that have been assigned to the device. - - pWdfResourcesTranslated - Supplies a pointer 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: - - HRESULT - ---*/ -{ - - ULONG i; - HRESULT hr = S_OK; - ULONG ConnectionCount = 0; - BOOLEAN fInterruptFound = FALSE; - PCM_PARTIAL_RESOURCE_DESCRIPTOR DescriptorTranslated; - PCM_PARTIAL_RESOURCE_DESCRIPTOR DescriptorRaw; - - // - // Parse the resource list and save the resource information. - // - - for (i=0; i < pWdfResourcesTranslated->GetCount(); i++) { - - DescriptorTranslated = (PCM_PARTIAL_RESOURCE_DESCRIPTOR)pWdfResourcesTranslated->GetDescriptor(i); - DescriptorRaw = (PCM_PARTIAL_RESOURCE_DESCRIPTOR)pWdfResourcesRaw->GetDescriptor(i); - - if(DescriptorTranslated == NULL) { - return E_FAIL; - } - - switch (DescriptorTranslated->Type) { - - // - // One or more GPIO IO resources are expected. In this implementation of the sample - // driver, however, only the first IO resource will be used (see OnD0Entry). - // - - case CmResourceTypeConnection: - - // - // Check against expected connection type for a GPIO IO descriptor - // - - if ((DescriptorTranslated->u.Connection.Class == - CM_RESOURCE_CONNECTION_CLASS_GPIO) && - (DescriptorTranslated->u.Connection.Type == - CM_RESOURCE_CONNECTION_TYPE_GPIO_IO)) { - - if (ConnectionCount >= MAX_CONNECTIONS) { - break; - } - - // - // Store GPIO IO resource connection ID in the device extension - // - - this->GetDeviceExtension()->ConnectionId[ConnectionCount].LowPart = - DescriptorTranslated->u.Connection.IdLowPart; - - this->GetDeviceExtension()->ConnectionId[ConnectionCount].HighPart = - DescriptorTranslated->u.Connection.IdHighPart; - } - - break; - - case CmResourceTypeInterrupt: - - // - // Connect the first interrupt resource we find - // - - if (fInterruptFound == FALSE) { - hr = this->SimdeviceConnectInterrupt( - pWdfDevice, - DescriptorRaw, - DescriptorTranslated); - - if (SUCCEEDED(hr)) { - fInterruptFound = TRUE; - } - } - default: - - // - // Ignore all other descriptors - // - - break; - } - } - - return hr; - -} - -HRESULT -CSimdevice::OnReleaseHardware( - _In_ IWDFDevice3 * pWdfDevice, - _In_ IWDFCmResourceList * pWdfResourcesTranslated - ) -/*++ - - -Routine Description: - - This method is called by WUDF to uninitialize the hardware. - -Parameters: - - pWdfDevice - pointer to an IWDFDevice object for the device - - pWdfResourcesTranslated - pointer to the translated resource list - -Return Values: - status - ---*/ -{ - UNREFERENCED_PARAMETER(pWdfDevice); - UNREFERENCED_PARAMETER(pWdfResourcesTranslated); - - return S_OK; -} - -HRESULT -CSimdevice::OnD0Entry( - _In_ IWDFDevice* pWdfDevice, - _In_ WDF_POWER_DEVICE_STATE previousState - ) - -/*++ - -Routine Description: - -This method is called after a new device enters the system - -Parameters: - - pWdfDevice - pointer to a device object - - previousState - previous WDF power state - -Return Values: - status - ---*/ -{ - - PDEVICE_EXTENSION DevExt; - HRESULT hr = S_OK; - BYTE Data; - NTSTATUS Status; - NTSTATUS Status1; - WCHAR ReadStringBuffer[100]; - WCHAR WriteStringBuffer[100]; - - UNREFERENCED_PARAMETER(pWdfDevice); - UNREFERENCED_PARAMETER(previousState); - - DevExt = GetDeviceExtension(); - - Status = StringCbPrintfW(&ReadStringBuffer[0], - sizeof(ReadStringBuffer), - L"\\\\.\\RESOURCE_HUB\\%0*I64x", - (size_t)(sizeof(LARGE_INTEGER) * 2), - DevExt->ConnectionId[0].QuadPart); - - Status = StringCbPrintfW(&WriteStringBuffer[0], - sizeof(WriteStringBuffer), - L"\\\\.\\RESOURCE_HUB\\%0*I64x", - (size_t)(sizeof(LARGE_INTEGER) * 2), - DevExt->ConnectionId[0].QuadPart); - - // - // Connect the first GPIO IO descriptor we find (in OnPrepareHardware) for read and write operations - // - - Data = 0xDB; - Status = STATUS_SUCCESS; - Status1 = TestReadWrite(pWdfDevice, &WriteStringBuffer[0], FALSE, &Data, sizeof(Data), NULL); - if (!NT_SUCCESS(Status1)) { - Status = Status1; - } - - Data = 0; - Status1 = TestReadWrite(pWdfDevice, &ReadStringBuffer[0], TRUE, &Data, sizeof(Data), NULL); - if (!NT_SUCCESS(Status1)) { - Status = Status1; - } - - return hr; -} - -HRESULT -CSimdevice::OnD0Exit( - _In_ IWDFDevice* pWdfDevice, - _In_ WDF_POWER_DEVICE_STATE TargetState - ) - -/*++ - -Routine Description: - -This method is called when a device exit D0 - -Parameters: - - pWdfDevice pointer to a device object - - TargetState - target D-state - -Return Values: - status - ---*/ - -{ - - UNREFERENCED_PARAMETER(pWdfDevice); - UNREFERENCED_PARAMETER(TargetState); - - return S_OK; -} - -HRESULT -CSimdevice::TestReadWrite( - _In_ IWDFDevice* pWdfDevice, - _In_ PWSTR RequestString, - _In_ BOOLEAN ReadOperation, - _Inout_updates_bytes_(Size) UCHAR *Data, - _In_ ULONG Size, - _Inout_opt_ IWDFRemoteTarget *IoTargetOut - ) - -/*++ - -Routine Description: - - This is a utility routine to test read or write on a set of GPIO pins. - -Arguments: - - pWdfDevice - Supplies a pointer to the framework device object. - - RequestString - Supplies a pointer to the unicode string to be opened. - - ReadOperation - Supplies a boolean that identifies whether read (TRUE) or - write (FALSE) should be performed. - - Data - Supplies a pointer containing the buffer that should be read from - or written to. - - Size - Supplies the size of the data buffer in bytes. - - IoTargetOut - Supplies a pointer that receives the IOTARGET created by - UMDF. - -Return Value: - - HRESULT - ---*/ - -{ - - IWDFMemory *pOutputMemory = NULL; - IWDFMemory *pInputMemory = NULL; - IRequestCallbackRequestCompletion *pICallback = NULL; - IWDFIoRequest *pIoRequest = NULL; - IWDFRemoteTarget *pRemoteTarget = NULL; - UMDF_IO_TARGET_OPEN_PARAMS OpenParams; - DWORD DesiredAccess; - HRESULT hr = S_OK; - IWDFRequestCompletionParams * FxComplParams = NULL; - IWDFDriver *pWdfDriver = NULL; - - UNREFERENCED_PARAMETER(IoTargetOut); - - if (ReadOperation != FALSE) { - DesiredAccess = FILE_GENERIC_READ; - - } else { - DesiredAccess = FILE_GENERIC_WRITE; - } - - // - // QueryIUnknown references the IUnknown interface that it returns - // (which is the same as referencing the CMyRemoteTarget). We pass that - // to the various Create* calls, which take their own reference if - // everything works. - // - - IUnknown * unknown = this->QueryIUnknown(); - - - IWDFDevice2 *pWdfDevice2 = NULL; - hr = pWdfDevice->QueryInterface(IID_PPV_ARGS(&pWdfDevice2)); - - // Create the IoTarget - - if (SUCCEEDED(hr)) { - hr = pWdfDevice2->CreateRemoteTarget( - unknown, - NULL, - &pRemoteTarget); - } - - // - // Determine whether the request is a read or write - // - - OpenParams.dwCreationDisposition = OPEN_EXISTING; - OpenParams.dwFlagsAndAttributes = FILE_FLAG_OVERLAPPED; - OpenParams.dwShareMode = FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE; - - - if (SUCCEEDED(hr)) { - hr = pRemoteTarget->OpenFileByName(RequestString, - DesiredAccess, - &OpenParams); - } - - // - //Create a new IO request - // - - if (SUCCEEDED(hr)) { - hr = pWdfDevice->CreateRequest(NULL, pWdfDevice, &pIoRequest); - } - - if (SUCCEEDED(hr)) { - hr = this->QueryInterface(__uuidof(IRequestCallbackRequestCompletion), (PVOID*)&pICallback); - - // - //Set completion callback - // - - if (SUCCEEDED(hr)){ - pIoRequest->SetCompletionCallback(pICallback, NULL); - } - - pWdfDevice->GetDriver(&pWdfDriver); - - hr = pWdfDriver->CreatePreallocatedWdfMemory(Data, - Size, - NULL, // no object event callback - pIoRequest, // request object as parent - &pInputMemory); - - hr = pWdfDriver->CreatePreallocatedWdfMemory(Data, - Size, - NULL, // no object event callback - pIoRequest, // request object as parent - &pOutputMemory); - - // - //Format IO request - // - - if (ReadOperation != FALSE){ - if (SUCCEEDED(hr)) { - hr = pRemoteTarget->FormatRequestForIoctl(pIoRequest, - IOCTL_GPIO_READ_PINS, - NULL, - NULL, - NULL, - pOutputMemory, - NULL); - } - } - else { - if (SUCCEEDED(hr)) { - hr = pRemoteTarget->FormatRequestForIoctl(pIoRequest, - IOCTL_GPIO_WRITE_PINS, - NULL, - pInputMemory, - NULL, - pOutputMemory, - NULL); - } - } - - // - //Send down the request - // - if (SUCCEEDED(hr)) { - hr = pIoRequest->Send(pRemoteTarget, - WDF_REQUEST_SEND_OPTION_SYNCHRONOUS, - 0); //No timeout - } - - if (SUCCEEDED(hr)) { - - // - //Get IWDFRequestCompletionParams interface and then get completion status. - // - - pIoRequest->GetCompletionParams(&FxComplParams); - hr = FxComplParams->GetCompletionStatus(); - } - - if(FAILED(hr)) { - pIoRequest->DeleteWdfObject(); - pIoRequest = NULL; - } - } - - // - // Clean-up - // - - if (pWdfDevice2 != NULL) { - SAFE_RELEASE(pWdfDevice2); - } - - if (pWdfDriver != NULL) { - SAFE_RELEASE(pWdfDriver); - } - - if (pRemoteTarget != NULL) { - pRemoteTarget->Close(); - } - - return hr; -} - - -void -CSimdevice::OnSurpriseRemoval( - _In_ IWDFDevice* pWdfDevice - ) - -/*++ - -Routine Description: - -This method is called when a device is surprise removed - -Parameters: - - pWdfDevice pointer to a device object - -Return Values: - None - ---*/ - -{ - UNREFERENCED_PARAMETER(pWdfDevice); -} - - -HRESULT -CSimdevice::OnQueryRemove( - _In_ IWDFDevice* pWdfDevice - ) -/*++ - -Routine Description: - -This method is called when a device processes the query remove IRP - -Parameters: - - pWdfDevice pointer to a device object - -Return Values: - HRESULT - ---*/ - - -{ - UNREFERENCED_PARAMETER(pWdfDevice); - return S_OK; -} - -HRESULT -CSimdevice::OnQueryStop( - _In_ IWDFDevice* pWdfDevice - ) -/*++ - -Routine Description: - -This method is called when a device processes the query stop IRP - -Parameters: - - pWdfDevice pointer to a device object - -Return Values: - HRESULT - ---*/ -{ - UNREFERENCED_PARAMETER(pWdfDevice); - return S_OK; -} - -HRESULT -CSimdevice::SimdeviceConnectInterrupt( - _In_ IWDFDevice* pWdfDevice, - _In_opt_ PCM_PARTIAL_RESOURCE_DESCRIPTOR RawResource, - _In_opt_ PCM_PARTIAL_RESOURCE_DESCRIPTOR TranslatedResource - ) - -/*++ - -Routine Description: - - This is a utility routine to create an interrupt descriptor from the interrupt resource - acquired from OnPrepareHardware and connect the device ISR routine. -Arguments: - - pWdfDevice - Supplies a pointer to the framework device object. - - pWdfResourcesRaw - Supplies a pointer to a collection of framework resource - objects. This collection identifies the raw (bus-relative) hardware - resources that have been assigned to the device. - - pWdfResourcesTranslated - Supplies a pointer 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: - - None. - ---*/ - -{ - - IWDFDevice3 * pIWDFDevice3 = NULL; - IWDFInterrupt * spInterrupt = NULL; - HRESULT hr = S_OK; - - if (pWdfDevice == NULL) { - hr = E_INVALIDARG; - } - - if (SUCCEEDED(hr)) { - hr = pWdfDevice->QueryInterface(IID_PPV_ARGS(&pIWDFDevice3)); - } - - if (SUCCEEDED(hr)) { - - // - // Create interrupt - // - - WUDF_INTERRUPT_CONFIG config; - WUDF_INTERRUPT_CONFIG_INIT( - &config, - &CSimdevice::OnInterruptIsr, - &CSimdevice::OnInterruptWorkItem); - - config.InterruptRaw = RawResource; - config.InterruptTranslated = TranslatedResource; - - hr = pIWDFDevice3->CreateInterrupt(&config, &spInterrupt); - } - - // - // Associate the device context with the interrupt - // - - if (SUCCEEDED(hr)) { - hr = spInterrupt->AssignContext(NULL, (void*)this); - } - - return hr; -} - -BOOLEAN -CSimdevice::OnInterruptIsr( - _In_ IWDFInterrupt* pInterrupt, - _In_ ULONG MessageID, - _In_ ULONG Reserved - ) - -/* ++ - -Routine Description: - - This method is called when an interrupt occurs. It determines if the - driver owns the interrupt and queues a work item to defer processing - of the data. - - Arguments: - - pInterrupt - pointer to the interrupt object - MessageID - interrupt message ID - Reserved - - -Return Values: - TRUE if interrupt recognized, else FALSE. - --- */ - -{ - - UNREFERENCED_PARAMETER(MessageID); - UNREFERENCED_PARAMETER(Reserved); - - IWDFDevice* pWdfDevice = NULL; - CSimdevice* pMyDevice = NULL; - HRESULT hr; - - hr = pInterrupt->RetrieveContext((void**)&pMyDevice); - - if (FAILED(hr)) { - pWdfDevice = pInterrupt->GetDevice(); - pWdfDevice->SetPnpState(WdfPnpStateFailed, WdfTrue); - pWdfDevice->CommitPnpState(); - } - - // - // The sample driver always returns TRUE (e.g. claiming the interrupt) - // from its ISR. In reality, the driver needs to do whatever necessary to - // quiesce the interrupt before claiming the interrupt. - // If additional work needs to be done at , schedule a work item (as we do here). - // - - pInterrupt->QueueWorkItemForIsr(); - - return TRUE; -} - -VOID -CSimdevice::OnInterruptWorkItem( - _In_ IWDFInterrupt* pInterrupt, - _In_ IWDFObject* AssociatedObject - ) - -/* ++ - -Routine Description: - - This method is called on behalf of an interrupt to defer processing. - It retrieves latest data and posts it. - -Arguments: - pInterrupt - pointer to the interrupt object - AssociatedObject - pointer to the associated object - -Return Values: - None. - ---*/ -{ - - UNREFERENCED_PARAMETER(AssociatedObject); - - IWDFDevice* pWdfDevice = NULL; - CSimdevice* pMyDevice; - HRESULT hr; - - hr = pInterrupt->RetrieveContext((void**)&pMyDevice); - - if (FAILED(hr)) { - pWdfDevice = pInterrupt->GetDevice(); - pWdfDevice->SetPnpState(WdfPnpStateFailed, WdfTrue); - pWdfDevice->CommitPnpState(); - } - - - // - // The sample driver does nothing in the work item routine. The real driver - // can add code here to accomplish all that is required to complete the serving - // of the interrupt - // - - return; -} - - |