public static string SetupDiGetDeviceInterfaceDetail(
SafeDeviceInfoSetHandle lpDeviceInfoSet,
DeviceInterfaceData oInterfaceData,
IntPtr lpDeviceInfoData)
{
var requiredSize = new NullableUInt32();
// First call to get the size to allocate
SetupDiGetDeviceInterfaceDetail(
lpDeviceInfoSet,
ref oInterfaceData,
IntPtr.Zero,
0,
requiredSize,
null);
// As we passed an empty buffer we know that the function will fail, not need to check the result.
var lastError = GetLastError();
if (lastError != Win32ErrorCode.ERROR_INSUFFICIENT_BUFFER)
{
throw new Win32Exception(lastError);
}
var buffer = Marshal.AllocHGlobal((int)requiredSize.Value);
try
{
Marshal.WriteInt32(buffer, DeviceInterfaceDetailDataSize.Value);
// Second call to get the value
var success = SetupDiGetDeviceInterfaceDetail(
lpDeviceInfoSet,
ref oInterfaceData,
buffer,
(uint)requiredSize,
null,
null);
if (!success)
{
Marshal.ThrowExceptionForHR(Marshal.GetHRForLastWin32Error());
return null;
}
var strPtr = new IntPtr(buffer.ToInt64() + 4);
return Marshal.PtrToStringAuto(strPtr);
}
finally
{
Marshal.FreeHGlobal(buffer);
}
}
public static extern bool SetNamedPipeHandleState(
SafeObjectHandle hNamedPipe,
NullablePipeMode lpMode,
NullableUInt32 lpMaxCollectionCount,
NullableUInt32 lpCollectDataTimeout);
public static unsafe extern bool WriteFile(
SafeObjectHandle hFile,
void* lpBuffer,
uint nNumberOfBytesToWrite,
NullableUInt32 lpNumberOfBytesWritten,
OVERLAPPED* lpOverlapped);
public static unsafe extern bool ReadFile(
SafeObjectHandle hFile,
void* lpBuffer,
uint nNumberOfBytesToRead,
NullableUInt32 lpNumberOfBytesRead,
OVERLAPPED* lpOverlapped);
unsafe public bool ReadFile(
SafeObjectHandle hFile,
void* lpBuffer,
uint nNumberOfBytesToRead,
NullableUInt32 lpNumberOfBytesRead,
OVERLAPPED* lpOverlapped)
=> ReadFile(hFile, lpBuffer, nNumberOfBytesToRead, lpNumberOfBytesRead, lpOverlapped);
public bool SetupDiGetDeviceInterfaceDetail(
SafeDeviceInfoSetHandle deviceInfoSet,
ref DeviceInterfaceData deviceInterfaceData,
IntPtr deviceInterfaceDetailData,
uint deviceInterfaceDetailDataSize,
NullableUInt32 requiredSize,
DeviceInfoData deviceInfoData)
=> SetupDiGetDeviceInterfaceDetail(deviceInfoSet, ref deviceInterfaceData, deviceInterfaceDetailData, deviceInterfaceDetailDataSize, requiredSize, deviceInfoData);
/// <summary>
/// Writes data to the specified file or input/output (I/O) device.
/// <para>
/// This function is designed for both synchronous and asynchronous operation. For a similar function designed
/// solely for asynchronous operation, see WriteFileEx.
/// </para>
/// </summary>
/// <param name="hFile">
/// A handle to the file or I/O device (for example, a file, file stream, physical disk, volume, console buffer, tape
/// drive, socket, communications resource, mailslot, or pipe).
/// <para>
/// The hFile parameter must have been created with the write access. For more information, see Generic Access
/// Rights and File Security and Access Rights.
/// </para>
/// <para>
/// For asynchronous write operations, hFile can be any handle opened with the CreateFile function using the
/// FILE_FLAG_OVERLAPPED flag or a socket handle returned by the socket or accept function.
/// </para>
/// </param>
/// <param name="lpBuffer">
/// A pointer to the buffer containing the data to be written to the file or device.
/// <para>
/// This buffer must remain valid for the duration of the write operation. The caller must not use this buffer
/// until the write operation is completed.
/// </para>
/// </param>
/// <param name="nNumberOfBytesToWrite">
/// The number of bytes to be written to the file or device.
/// <para>
/// A value of zero specifies a null write operation. The behavior of a null write operation depends on the
/// underlying file system or communications technology.
/// </para>
/// </param>
/// <param name="lpNumberOfBytesWritten">
/// A pointer to the variable that receives the number of bytes written when using a synchronous hFile parameter.
/// WriteFile sets this value to zero before doing any work or error checking. Use <see langword="null" />
/// for this parameter if this is an asynchronous operation to avoid potentially erroneous results.
/// <para>
/// This parameter can be NULL only when the <paramref name="lpOverlapped" /> parameter is not
/// <see langword="null" />.
/// </para>
/// </param>
/// <param name="lpOverlapped">
/// A pointer to an <see cref="OVERLAPPED" /> structure is required if the hFile parameter was opened with
/// FILE_FLAG_OVERLAPPED, otherwise this parameter can be NULL.
/// <para>
/// For an hFile that supports byte offsets, if you use this parameter you must specify a byte offset at which to
/// start writing to the file or device. This offset is specified by setting the Offset and OffsetHigh members of
/// the <see cref="OVERLAPPED" /> structure. For an hFile that does not support byte offsets, Offset and OffsetHigh
/// are ignored.
/// </para>
/// <para>
/// To write to the end of file, specify both the Offset and OffsetHigh members of the <see cref="OVERLAPPED" />
/// structure as 0xFFFFFFFF. This is functionally equivalent to previously calling the CreateFile function to open
/// hFile using FILE_APPEND_DATA access.
/// </para>
/// </param>
/// <returns>
/// If the function succeeds, the return value is <see langword="true" />.
/// <para>
/// If the function fails, or is completing asynchronously, the return value is <see langword="false" />. To get
/// extended error information, call the GetLastError function.
/// </para>
/// <para>
/// Note: The <see cref="GetLastError" /> code <see cref="Win32ErrorCode.ERROR_IO_PENDING" /> is not a failure;
/// it designates the write operation is pending completion asynchronously.
/// </para>
/// </returns>
public bool InvokeWriteFile(
SafeObjectHandle hFile,
void* lpBuffer,
uint nNumberOfBytesToWrite,
NullableUInt32 lpNumberOfBytesWritten,
OVERLAPPED* lpOverlapped)
=> WriteFile(hFile, lpBuffer, nNumberOfBytesToWrite, lpNumberOfBytesWritten, lpOverlapped);
public static extern bool SetupDiGetDeviceInterfaceDetail(
SafeDeviceInfoSetHandle deviceInfoSet,
ref DeviceInterfaceData deviceInterfaceData,
IntPtr deviceInterfaceDetailData,
int deviceInterfaceDetailDataSize,
NullableUInt32 requiredSize,
DeviceInfoData deviceInfoData);
public static extern unsafe bool WriteFile(
SafeObjectHandle hFile,
void *lpBuffer,
int nNumberOfBytesToWrite,
NullableUInt32 lpNumberOfBytesWritten,
OVERLAPPED *lpOverlapped);
public static extern unsafe bool ReadFile(
SafeObjectHandle hFile,
void *lpBuffer,
int nNumberOfBytesToRead,
NullableUInt32 lpNumberOfBytesRead,
OVERLAPPED *lpOverlapped);