reactos/modules/rosapps/drivers/green/misc.c

115 lines
3 KiB
C

/*
* PROJECT: ReactOS VT100 emulator
* LICENSE: GPL - See COPYING in the top level directory
* FILE: drivers/base/green/misc.c
* PURPOSE: Misceallenous operations
* PROGRAMMERS: Copyright 2005-2006 Hervé Poussineau (hpoussin@reactos.org)
*/
#include "green.h"
#define NDEBUG
#include <debug.h>
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)
{
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;
}
NTSTATUS
ReadRegistryEntries(
IN PUNICODE_STRING RegistryPath,
IN PGREEN_DRIVER_EXTENSION DriverExtension)
{
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;
}