mirror of
https://github.com/reactos/reactos.git
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115 lines
3 KiB
C
115 lines
3 KiB
C
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/*
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* PROJECT: ReactOS VT100 emulator
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* LICENSE: GPL - See COPYING in the top level directory
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* FILE: drivers/base/green/misc.c
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* PURPOSE: Misceallenous operations
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* PROGRAMMERS: Copyright 2005-2006 Herv<EFBFBD> Poussineau (hpoussin@reactos.org)
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*/
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#include "green.h"
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#define NDEBUG
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#include <debug.h>
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NTSTATUS
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GreenDeviceIoControl(
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IN PDEVICE_OBJECT DeviceObject,
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IN ULONG CtlCode,
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IN PVOID InputBuffer OPTIONAL,
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IN ULONG InputBufferSize,
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IN OUT PVOID OutputBuffer OPTIONAL,
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IN OUT PULONG OutputBufferSize)
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{
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KEVENT Event;
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PIRP Irp;
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IO_STATUS_BLOCK IoStatus;
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NTSTATUS Status;
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KeInitializeEvent (&Event, NotificationEvent, FALSE);
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Irp = IoBuildDeviceIoControlRequest(CtlCode,
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DeviceObject,
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InputBuffer,
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InputBufferSize,
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OutputBuffer,
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(OutputBufferSize) ? *OutputBufferSize : 0,
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FALSE,
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&Event,
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&IoStatus);
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if (Irp == NULL)
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{
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DPRINT("IoBuildDeviceIoControlRequest() failed\n");
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return STATUS_INSUFFICIENT_RESOURCES;
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}
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Status = IoCallDriver(DeviceObject, Irp);
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if (Status == STATUS_PENDING)
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{
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DPRINT("Operation pending\n");
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KeWaitForSingleObject(&Event, Suspended, KernelMode, FALSE, NULL);
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Status = IoStatus.Status;
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}
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if (OutputBufferSize)
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{
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*OutputBufferSize = IoStatus.Information;
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}
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return Status;
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}
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NTSTATUS
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ReadRegistryEntries(
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IN PUNICODE_STRING RegistryPath,
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IN PGREEN_DRIVER_EXTENSION DriverExtension)
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{
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UNICODE_STRING ParametersRegistryKey;
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RTL_QUERY_REGISTRY_TABLE Parameters[4];
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NTSTATUS Status;
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ULONG DefaultDeviceReported = 0;
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ULONG DefaultSampleRate = 1200;
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ParametersRegistryKey.Length = 0;
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ParametersRegistryKey.MaximumLength = RegistryPath->Length + sizeof(L"\\Parameters") + sizeof(UNICODE_NULL);
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ParametersRegistryKey.Buffer = ExAllocatePool(PagedPool, ParametersRegistryKey.MaximumLength);
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if (!ParametersRegistryKey.Buffer)
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{
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DPRINT("ExAllocatePool() failed\n");
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return STATUS_INSUFFICIENT_RESOURCES;
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}
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RtlCopyUnicodeString(&ParametersRegistryKey, RegistryPath);
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RtlAppendUnicodeToString(&ParametersRegistryKey, L"\\Parameters");
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ParametersRegistryKey.Buffer[ParametersRegistryKey.Length / sizeof(WCHAR)] = UNICODE_NULL;
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RtlZeroMemory(Parameters, sizeof(Parameters));
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Parameters[0].Flags = RTL_QUERY_REGISTRY_DIRECT;
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Parameters[0].Name = L"AttachedDevice";
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Parameters[0].EntryContext = &DriverExtension->AttachedDeviceName;
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Parameters[1].Flags = RTL_QUERY_REGISTRY_DIRECT | RTL_REGISTRY_OPTIONAL;
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Parameters[1].Name = L"DeviceReported";
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Parameters[1].EntryContext = &DriverExtension->DeviceReported;
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Parameters[1].DefaultType = REG_DWORD;
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Parameters[1].DefaultData = &DefaultDeviceReported;
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Parameters[1].DefaultLength = sizeof(ULONG);
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Parameters[2].Flags = RTL_QUERY_REGISTRY_DIRECT | RTL_REGISTRY_OPTIONAL;
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Parameters[2].Name = L"SampleRate";
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Parameters[2].EntryContext = &DriverExtension->SampleRate;
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Parameters[2].DefaultType = REG_DWORD;
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Parameters[2].DefaultData = &DefaultSampleRate;
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Parameters[2].DefaultLength = sizeof(ULONG);
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Status = RtlQueryRegistryValues(
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RTL_REGISTRY_ABSOLUTE,
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ParametersRegistryKey.Buffer,
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Parameters,
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NULL,
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NULL);
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return Status;
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}
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