internal static byte[] ConvertHGlobalToByteArray(SafeHGlobalHandle hGlobal)
{
// this has to be Int32, even on 64 bit machines since Marshal.Copy takes a 32 bit integer
Int32 sizeOfByteArray = (SafeNativeMethods.GlobalSize(hGlobal)).ToInt32();
if (sizeOfByteArray > 0)
{
byte[] byteArray = new Byte[sizeOfByteArray];
IntPtr pBuff = SafeNativeMethods.GlobalLock(hGlobal);
if (IntPtr.Zero == pBuff)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new OutOfMemoryException());
}
try
{
Marshal.Copy(pBuff, byteArray, 0, sizeOfByteArray);
}
finally
{
SafeNativeMethods.GlobalUnlock(hGlobal);
}
return(byteArray);
}
return(null);
}
internal static void LoadIntoObjectFromByteArray(IPersistStream persistableObject, Byte[] byteStream)
{
SafeHGlobalHandle hGlobal = SafeHGlobalHandle.AllocHGlobal(byteStream.Length);
IntPtr pBuff = SafeNativeMethods.GlobalLock(hGlobal);
if (IntPtr.Zero == pBuff)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new OutOfMemoryException());
}
try
{
Marshal.Copy(byteStream, 0, pBuff, byteStream.Length);
IStream stream = SafeNativeMethods.CreateStreamOnHGlobal(hGlobal, false);
try
{
persistableObject.Load(stream);
}
finally
{
Marshal.ReleaseComObject(stream);
}
}
finally
{
SafeNativeMethods.GlobalUnlock(hGlobal);
}
}
public static SafeHandle GetTokenInformation(SafeCloseHandle token, TOKEN_INFORMATION_CLASS infoClass)
{
uint length;
if (!SafeNativeMethods.GetTokenInformation(token, infoClass, SafeHGlobalHandle.InvalidHandle, 0, out length))
{
int error = Marshal.GetLastWin32Error();
if (error != (int)Win32Error.ERROR_INSUFFICIENT_BUFFER)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new Win32Exception(error, SR.GetString(SR.GetTokenInfoFailed, error)));
}
}
SafeHandle buffer = SafeHGlobalHandle.AllocHGlobal(length);
try
{
if (!SafeNativeMethods.GetTokenInformation(token, infoClass, buffer, length, out length))
{
int error = Marshal.GetLastWin32Error();
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new Win32Exception(error, SR.GetString(SR.GetTokenInfoFailed, error)));
}
}
catch
{
buffer.Dispose();
throw;
}
return(buffer);
}
internal static Byte[] PersistIPersistStreamToByteArray(IPersistStream persistableObject)
{
IStream stream = SafeNativeMethods.CreateStreamOnHGlobal(SafeHGlobalHandle.InvalidHandle, false);
try
{
persistableObject.Save(stream, true);
SafeHGlobalHandle hGlobal = SafeNativeMethods.GetHGlobalFromStream(stream);
if (null == hGlobal || IntPtr.Zero == hGlobal.DangerousGetHandle())
{
throw Fx.AssertAndThrow("HGlobal returned from GetHGlobalFromStream is NULL");
}
return(ConvertHGlobalToByteArray(hGlobal));
}
finally
{
Marshal.ReleaseComObject(stream);
}
}
internal static extern IntPtr GlobalSize(SafeHGlobalHandle hGlobal);
internal static extern bool GlobalUnlock(SafeHGlobalHandle hGlobal);
internal static extern IntPtr GlobalLock(SafeHGlobalHandle hGlobal);
public static extern IStream CreateStreamOnHGlobal(
[In] SafeHGlobalHandle hGlobal,
[In, MarshalAs(UnmanagedType.Bool)] bool fDeleteOnRelease);
internal static extern IntPtr GlobalSize(SafeHGlobalHandle hGlobal);
internal static extern bool GlobalUnlock(SafeHGlobalHandle hGlobal);
internal static extern IntPtr GlobalLock(SafeHGlobalHandle hGlobal);
