misc.c File Reference

#include "green.h"
#include <debug.h>

Include dependency graph for misc.c:

Go to the source code of this file.

Macros
#define	NDEBUG

Functions
NTSTATUS	GreenDeviceIoControl (IN PDEVICE_OBJECT DeviceObject, IN ULONG CtlCode, IN PVOID InputBuffer OPTIONAL, IN ULONG InputBufferSize, IN OUT PVOID OutputBuffer OPTIONAL, IN OUT PULONG OutputBufferSize)
NTSTATUS	ReadRegistryEntries (IN PUNICODE_STRING RegistryPath, IN PGREEN_DRIVER_EXTENSION DriverExtension)

Macro Definition Documentation

NDEBUG

#define NDEBUG

Definition at line 11 of file misc.c.

Function Documentation

GreenDeviceIoControl()

NTSTATUS GreenDeviceIoControl	(	IN PDEVICE_OBJECT	DeviceObject,
		IN ULONG	CtlCode,
		IN PVOID InputBuffer	OPTIONAL,
		IN ULONG	InputBufferSize,
		IN OUT PVOID OutputBuffer	OPTIONAL,
		IN OUT PULONG	OutputBufferSize
	)

Definition at line 15 of file misc.c.

{
    KEVENT Event;
    PIRP Irp;
    IO_STATUS_BLOCK IoStatus;
    NTSTATUS Status;
 
    KeInitializeEvent (&Event, NotificationEvent, FALSE);
 
    Irp = IoBuildDeviceIoControlRequest(CtlCode,
        DeviceObject,
        InputBuffer,
        InputBufferSize,
        OutputBuffer,
        (OutputBufferSize) ? *OutputBufferSize : 0,
        FALSE,
        &Event,
        &IoStatus);
    if (Irp == NULL)
    {
        DPRINT("IoBuildDeviceIoControlRequest() failed\n");
        return STATUS_INSUFFICIENT_RESOURCES;
    }
 
    Status = IoCallDriver(DeviceObject, Irp);
 
    if (Status == STATUS_PENDING)
    {
        DPRINT("Operation pending\n");
        KeWaitForSingleObject(&Event, Suspended, KernelMode, FALSE, NULL);
        Status = IoStatus.Status;
    }
 
    if (OutputBufferSize)
    {
        *OutputBufferSize = IoStatus.Information;
    }
 
    return Status;
}

Referenced by CreateGreenFdo().

ReadRegistryEntries()

NTSTATUS ReadRegistryEntries	(	IN PUNICODE_STRING	RegistryPath,
		IN PGREEN_DRIVER_EXTENSION	DriverExtension
	)

Definition at line 63 of file misc.c.

{
    UNICODE_STRING ParametersRegistryKey;
    RTL_QUERY_REGISTRY_TABLE Parameters[4];
    NTSTATUS Status;
 
    ULONG DefaultDeviceReported = 0;
    ULONG DefaultSampleRate = 1200;
 
    ParametersRegistryKey.Length = 0;
    ParametersRegistryKey.MaximumLength = RegistryPath->Length + sizeof(L"\\Parameters") + sizeof(UNICODE_NULL);
    ParametersRegistryKey.Buffer = ExAllocatePool(PagedPool, ParametersRegistryKey.MaximumLength);
    if (!ParametersRegistryKey.Buffer)
    {
        DPRINT("ExAllocatePool() failed\n");
        return STATUS_INSUFFICIENT_RESOURCES;
    }
    RtlCopyUnicodeString(&ParametersRegistryKey, RegistryPath);
    RtlAppendUnicodeToString(&ParametersRegistryKey, L"\\Parameters");
    ParametersRegistryKey.Buffer[ParametersRegistryKey.Length / sizeof(WCHAR)] = UNICODE_NULL;
 
    RtlZeroMemory(Parameters, sizeof(Parameters));
 
    Parameters[0].Flags = RTL_QUERY_REGISTRY_DIRECT;
    Parameters[0].Name = L"AttachedDevice";
    Parameters[0].EntryContext = &DriverExtension->AttachedDeviceName;
 
    Parameters[1].Flags = RTL_QUERY_REGISTRY_DIRECT | RTL_REGISTRY_OPTIONAL;
    Parameters[1].Name = L"DeviceReported";
    Parameters[1].EntryContext = &DriverExtension->DeviceReported;
    Parameters[1].DefaultType = REG_DWORD;
    Parameters[1].DefaultData = &DefaultDeviceReported;
    Parameters[1].DefaultLength = sizeof(ULONG);
 
    Parameters[2].Flags = RTL_QUERY_REGISTRY_DIRECT | RTL_REGISTRY_OPTIONAL;
    Parameters[2].Name = L"SampleRate";
    Parameters[2].EntryContext = &DriverExtension->SampleRate;
    Parameters[2].DefaultType = REG_DWORD;
    Parameters[2].DefaultData = &DefaultSampleRate;
    Parameters[2].DefaultLength = sizeof(ULONG);
 
    Status = RtlQueryRegistryValues(
        RTL_REGISTRY_ABSOLUTE,
        ParametersRegistryKey.Buffer,
        Parameters,
        NULL,
        NULL);
 
    return Status;
}