[Pnet-developers] [bug #20354] Problems with pinvoke declared to return struct

[Radek Polak]

Update of bug #20354 (project dotgnu-pnet):

                  Status:                    None => Invalid                
             Open/Closed:                    Open => Closed                 

    _______________________________________________________

Follow-up Comment #1:

It seems that the code works only on windows. On linux (even with mono) it
fails because of different calling conventions.

[13:47] <klausT|work> the pinvoked function doesn't return a struct
[13:51] <radekp> yep
[13:51] <klausT|work> does the function return an int or a boolean?
[13:51] <radekp> int
[13:52] <klausT|work> so you declared the return type in C# as int too?
[13:52] <radekp> if i declare return type as int it works
[13:53] <radekp> but if i declare it with return type as struct it fails
[13:53] <klausT|work> yes, of course it fails
[13:53] <radekp> on .NET it works on pnet no
[13:53] <klausT|work> because the signatures don't match
[13:54] <radekp> and on .NET they match?
[13:54] <klausT|work> on Windows you have usually the WINAPI/STDCALL calling
convention
[13:55] <klausT|work> the struct return value is handled different there
[13:55] <klausT|work> the callee pops the args from the stack and pushes the
return value
[13:57] <klausT|work> o no additional arg for the return value
[13:59] <radekp> so the conclusion is that the pinvoking is badly declared
and will work on windows only?
[14:01] <klausT|work> yes, if the c function returns an int the return value
in C# has to be int too

    _______________________________________________________

Reply to this item at:

  <http://savannah.gnu.org/bugs/?20354>

_______________________________________________
  Message sent via/by Savannah
  http://savannah.gnu.org/