mirror of
https://github.com/reactos/reactos.git
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137 lines
3.8 KiB
C++
137 lines
3.8 KiB
C++
/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS Kernel Streaming
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* FILE: drivers/wdm/audio/backpln/portcls/unregister.cpp
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* PURPOSE: Unregisters a subdevice
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* PROGRAMMER: Johannes Anderwald
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*/
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#include "private.hpp"
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#define NDEBUG
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#include <debug.h>
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class CUnregisterSubdevice : public CUnknownImpl<IUnregisterSubdevice>
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{
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public:
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STDMETHODIMP QueryInterface( REFIID InterfaceId, PVOID* Interface);
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IMP_IUnregisterSubdevice;
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CUnregisterSubdevice(IUnknown * OuterUnknown) {}
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virtual ~CUnregisterSubdevice(){}
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};
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NTSTATUS
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NTAPI
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CUnregisterSubdevice::QueryInterface(
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IN REFIID refiid,
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OUT PVOID* Output)
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{
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UNICODE_STRING GuidString;
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if (IsEqualGUIDAligned(refiid, IID_IUnregisterSubdevice) ||
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IsEqualGUIDAligned(refiid, IID_IUnknown))
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{
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*Output = PVOID(PUNREGISTERSUBDEVICE(this));
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PUNKNOWN(*Output)->AddRef();
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return STATUS_SUCCESS;
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}
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if (RtlStringFromGUID(refiid, &GuidString) == STATUS_SUCCESS)
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{
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DPRINT1("IPortWaveCyclic_fnQueryInterface no interface!!! iface %S\n", GuidString.Buffer);
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RtlFreeUnicodeString(&GuidString);
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}
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return STATUS_UNSUCCESSFUL;
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}
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NTSTATUS
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NTAPI
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CUnregisterSubdevice::UnregisterSubdevice(
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IN PDEVICE_OBJECT DeviceObject,
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IN PUNKNOWN Unknown)
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{
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PPCLASS_DEVICE_EXTENSION DeviceExtension;
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PLIST_ENTRY Entry;
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PSYMBOLICLINK_ENTRY SymLinkEntry;
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PSUBDEVICE_DESCRIPTOR SubDeviceDescriptor;
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ISubdevice *SubDevice;
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ULONG Index;
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NTSTATUS Status;
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PC_ASSERT_IRQL_EQUAL(PASSIVE_LEVEL);
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DeviceExtension = (PPCLASS_DEVICE_EXTENSION)DeviceObject->DeviceExtension;
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PC_ASSERT(DeviceExtension);
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// look up our undocumented interface
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Status = Unknown->QueryInterface(IID_ISubdevice, (LPVOID*)&SubDevice);
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if (!NT_SUCCESS(Status))
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{
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DPRINT("No ISubdevice interface\n");
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// the provided port driver doesnt support ISubdevice
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return STATUS_INVALID_PARAMETER;
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}
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Status = SubDevice->GetDescriptor(&SubDeviceDescriptor);
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if (!NT_SUCCESS(Status))
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{
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DPRINT("Failed to retrieve subdevice descriptor %x\n", Status);
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// the provided port driver doesnt support ISubdevice
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return STATUS_INVALID_PARAMETER;
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}
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// loop our create items and disable the create handler
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for(Index = 0; Index < DeviceExtension->MaxSubDevices; Index++)
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{
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if (!RtlCompareUnicodeString(&SubDeviceDescriptor->RefString, &DeviceExtension->CreateItems[Index].ObjectClass, TRUE))
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{
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DeviceExtension->CreateItems[Index].Create = NULL;
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RtlInitUnicodeString(&DeviceExtension->CreateItems[Index].ObjectClass, NULL);
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break;
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}
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}
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// now unregister device interfaces
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while(!IsListEmpty(&SubDeviceDescriptor->SymbolicLinkList))
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{
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// remove entry
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Entry = RemoveHeadList(&SubDeviceDescriptor->SymbolicLinkList);
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// get symlink entry
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SymLinkEntry = (PSYMBOLICLINK_ENTRY)CONTAINING_RECORD(Entry, SYMBOLICLINK_ENTRY, Entry);
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// unregister device interface
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IoSetDeviceInterfaceState(&SymLinkEntry->SymbolicLink, FALSE);
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// free symbolic link
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RtlFreeUnicodeString(&SymLinkEntry->SymbolicLink);
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// free sym entry
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FreeItem(SymLinkEntry, TAG_PORTCLASS);
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}
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return STATUS_SUCCESS;
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}
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NTSTATUS
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NTAPI
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NewIUnregisterSubdevice(
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OUT PUNREGISTERSUBDEVICE *OutDevice)
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{
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NTSTATUS Status;
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CUnregisterSubdevice * This = new(NonPagedPool, TAG_PORTCLASS) CUnregisterSubdevice(NULL);
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if (!This)
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return STATUS_INSUFFICIENT_RESOURCES;
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Status = This->QueryInterface(IID_IUnregisterSubdevice, (PVOID*)OutDevice);
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if (!NT_SUCCESS(Status))
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{
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delete This;
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return Status;
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}
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*OutDevice = (PUNREGISTERSUBDEVICE)This;
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return Status;
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}
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