/// <summary>
/// Entry point for unmanaged COM activation API from managed code
/// </summary>
/// <param name="cxt">Reference to a <see cref="ComActivationContext"/> instance</param>
public static object GetClassFactoryForType(ComActivationContext cxt)
{
if (cxt.InterfaceId != typeof(IClassFactory).GUID &&
cxt.InterfaceId != typeof(IClassFactory2).GUID)
{
throw new NotSupportedException();
}
if (!Path.IsPathRooted(cxt.AssemblyPath))
{
throw new ArgumentException();
}
Type classType = FindClassType(cxt.ClassId, cxt.AssemblyPath, cxt.AssemblyName, cxt.TypeName);
return(new BasicClassFactory(cxt.ClassId, classType));
}
public unsafe static int GetClassFactoryForTypeInternal(ref ComActivationContextInternal cxtInt)
{
if (IsLoggingEnabled())
{
Log(
$@"{nameof(GetClassFactoryForTypeInternal)} arguments:
{cxtInt.ClassId}
{cxtInt.InterfaceId}
0x{(ulong)cxtInt.AssemblyPathBuffer:x}
0x{(ulong)cxtInt.AssemblyNameBuffer:x}
0x{(ulong)cxtInt.TypeNameBuffer:x}
0x{cxtInt.ClassFactoryDest.ToInt64():x}");
}
try
{
var cxt = new ComActivationContext()
{
ClassId = cxtInt.ClassId,
InterfaceId = cxtInt.InterfaceId,
AssemblyPath = Marshal.PtrToStringUni(new IntPtr(cxtInt.AssemblyPathBuffer)),
AssemblyName = Marshal.PtrToStringUni(new IntPtr(cxtInt.AssemblyNameBuffer)),
TypeName = Marshal.PtrToStringUni(new IntPtr(cxtInt.TypeNameBuffer))
};
object cf = GetClassFactoryForType(cxt);
IntPtr nativeIUnknown = Marshal.GetIUnknownForObject(cf);
Marshal.WriteIntPtr(cxtInt.ClassFactoryDest, nativeIUnknown);
}
catch (Exception e)
{
return(e.HResult);
}
return(0);
}
// Exists here to allow tests to build on any platform. public static void ClassRegistrationScenarioForType(ComActivationContext cxt, bool register) => throw new PlatformNotSupportedException();
// Exists here to allow tests to build on any platform. public static object GetClassFactoryForType(ComActivationContext cxt) => throw new PlatformNotSupportedException();
