registry.cpp File Reference

#include "private.hpp"
#include <debug.h>

Include dependency graph for registry.cpp:

Go to the source code of this file.

Classes
class	CRegistryKey

Macros
#define	NDEBUG

Functions
NTSTATUS NTAPI	PcNewRegistryKey (OUT PREGISTRYKEY *OutRegistryKey, IN PUNKNOWN OuterUnknown OPTIONAL, IN ULONG RegistryKeyType, IN ACCESS_MASK DesiredAccess, IN PVOID DeviceObject OPTIONAL, IN PVOID SubDevice OPTIONAL, IN POBJECT_ATTRIBUTES ObjectAttributes OPTIONAL, IN ULONG CreateOptions OPTIONAL, OUT PULONG Disposition OPTIONAL)

Macro Definition Documentation

NDEBUG

#define NDEBUG

Definition at line 12 of file registry.cpp.

Function Documentation

PcNewRegistryKey()

NTSTATUS NTAPI PcNewRegistryKey	(	OUT PREGISTRYKEY *	OutRegistryKey,
		IN PUNKNOWN OuterUnknown	OPTIONAL,
		IN ULONG	RegistryKeyType,
		IN ACCESS_MASK	DesiredAccess,
		IN PVOID DeviceObject	OPTIONAL,
		IN PVOID SubDevice	OPTIONAL,
		IN POBJECT_ATTRIBUTES ObjectAttributes	OPTIONAL,
		IN ULONG CreateOptions	OPTIONAL,
		OUT PULONG Disposition	OPTIONAL
	)

Definition at line 268 of file registry.cpp.

{
    HANDLE hHandle;
    NTSTATUS Status = STATUS_UNSUCCESSFUL;
    CRegistryKey * RegistryKey;
    PPCLASS_DEVICE_EXTENSION DeviceExt;
    PSUBDEVICE_DESCRIPTOR SubDeviceDescriptor;
    ISubdevice * Device;
    PSYMBOLICLINK_ENTRY SymEntry;
    BOOL CanDelete = FALSE;

    DPRINT("PcNewRegistryKey entered\n");

    if (!OutRegistryKey)
        return STATUS_INVALID_PARAMETER;

    if (RegistryKeyType != GeneralRegistryKey &&
        RegistryKeyType != DeviceRegistryKey &&
        RegistryKeyType != DriverRegistryKey &&
        RegistryKeyType != HwProfileRegistryKey &&
        RegistryKeyType != DeviceInterfaceRegistryKey)
    {
        return STATUS_INVALID_PARAMETER;
    }

    // check for the key type
    if (RegistryKeyType == GeneralRegistryKey)
    {
        // do we have the required object attributes
        if (!ObjectAttributes)
        {
            // object attributes is mandatory
            return STATUS_INVALID_PARAMETER;
        }
        // try to create the key
        Status = ZwCreateKey(&hHandle, DesiredAccess, ObjectAttributes, 0, NULL, CreateOptions, Disposition);

        // key can be deleted
        CanDelete = TRUE;
    }
    else if (RegistryKeyType == DeviceRegistryKey ||
             RegistryKeyType == DriverRegistryKey ||
             RegistryKeyType == HwProfileRegistryKey)
    {
        // check for HwProfileRegistryKey case
        if (RegistryKeyType == HwProfileRegistryKey)
        {
             // IoOpenDeviceRegistryKey used different constant
            RegistryKeyType = PLUGPLAY_REGKEY_CURRENT_HWPROFILE | PLUGPLAY_REGKEY_DEVICE;
        }

        // obtain the new device extension
        DeviceExt = (PPCLASS_DEVICE_EXTENSION) ((PDEVICE_OBJECT)DeviceObject)->DeviceExtension;

        Status = IoOpenDeviceRegistryKey(DeviceExt->PhysicalDeviceObject, RegistryKeyType, DesiredAccess, &hHandle);
    }
    else if (RegistryKeyType == DeviceInterfaceRegistryKey)
    {
        if (SubDevice == NULL)
        {
            // invalid parameter
            return STATUS_INVALID_PARAMETER;
        }

        // look up our undocumented interface
        Status = ((PUNKNOWN)SubDevice)->QueryInterface(IID_ISubdevice, (LPVOID*)&Device);

        if (!NT_SUCCESS(Status))
        {
            DPRINT("No ISubdevice interface\n");
            // invalid parameter
            return STATUS_INVALID_PARAMETER;
        }

        // get the subdevice descriptor
        Status = Device->GetDescriptor(&SubDeviceDescriptor);
        if (!NT_SUCCESS(Status))
        {
            DPRINT("Failed to get subdevice descriptor %x\n", Status);
            ((PUNKNOWN)SubDevice)->Release();
            return STATUS_UNSUCCESSFUL;
        }

        // is there an registered device interface
        if (IsListEmpty(&SubDeviceDescriptor->SymbolicLinkList))
        {
            DPRINT("No device interface registered\n");
            ((PUNKNOWN)SubDevice)->Release();
            return STATUS_UNSUCCESSFUL;
        }

        // get the first symbolic link
        SymEntry = (PSYMBOLICLINK_ENTRY)CONTAINING_RECORD(SubDeviceDescriptor->SymbolicLinkList.Flink, SYMBOLICLINK_ENTRY, Entry);

        // open device interface
        Status = IoOpenDeviceInterfaceRegistryKey(&SymEntry->SymbolicLink, DesiredAccess, &hHandle);

        // release subdevice interface
        ((PUNKNOWN)SubDevice)->Release();
    }

    // check for success
    if (!NT_SUCCESS(Status))
    {
        DPRINT1("PcNewRegistryKey failed with %lx\n", Status);
        return Status;
    }

    // allocate new registry key object
    RegistryKey = new(NonPagedPool, TAG_PORTCLASS)CRegistryKey(OuterUnknown, hHandle, CanDelete);
    if (!RegistryKey)
    {
        // not enough memory
        ZwClose(hHandle);
        return STATUS_INSUFFICIENT_RESOURCES;
    }

    // query for interface
    Status = RegistryKey->QueryInterface(IID_IRegistryKey, (PVOID*)OutRegistryKey);

    if (!NT_SUCCESS(Status))
    {
        // out of memory
        delete RegistryKey;
    }

    DPRINT("PcNewRegistryKey result %p\n", *OutRegistryKey);
    return STATUS_SUCCESS;
}

Referenced by CAC97AdapterCommon::DisableAC97Pin(), CMiniportWaveCMI::loadChannelConfigFromRegistry(), CAC97AdapterCommon::SetAC97Default(), and CMiniportWaveCMI::storeChannelConfigToRegistry().