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Date: Thu, 01 Mar 2012 17:25:36 +0100
From: Georg Bauhaus <rm.dash-bauhaus@futureapps.de>
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Subject: Re: Using dll from a C# code
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Date: 2012-03-01T17:25:36+01:00
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On 01.03.12 16:15, Rego, P. wrote:
> Em quinta-feira, 1 de mar�o de 2012 11h38min52s UTC-3, gautier...@hotmail.com  escreveu:
>> Le jeudi 1 mars 2012 12:41:55 UTC+1, Rego, P. a �crit :
>>
>>> Actually no. I am using native .NET for generating the dll. So I just run C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319 /t:library simple.cs
>>
>> A .NET DLL is not a traditional DLL and has not Intel machine code in it.
>> It was called DLL just to avoid disturbing some people (and confusing other). 
> 
> I don't get it. So is not possible to import a C#/.NET method in dll in an Ada code?

It is possible to import a method of a .NET type into a native
Ada program if it is possible to import a method of a .NET type
into a native C++ program, i.e. not into a C++/CLI program,
but into a C++ program that is compiled with a C++ compiler
that generates processor instructions, not .NET byte code.

Similar possibilities exist for importing methods of a compiled
Java class (JVM byte code) into an Ada program that is compiled
into Intel/AMD processor instructions.

IINM, DLL in
- .NET means libraries of O-O types with methods, in byte code.
- Win32 means libraries of functions, processor instructions.

The Windows(TM) platforms are many. It is necessary to pick
compilers for compatible targets. For example, A# (GNAT for .NET)
with one of the .NET compilers by Microsoft.

But then, using .NET types from A# programs means with-ing
packages of .NET types, not importing single methods.

public class VerifyClass { ... }

will become a tagged type on the Ada side, and you use
this Ada type almost as usual in O-O Ada.  There will a pointer to
the reference handling objects of imported type VerifyClass.