c++ typedef structs in c#

[Guest]

Hi,
i know that typedef structs creates an aliases for a particular struct in C++.
i m trying to convert .h c++ files to a namespace in C#.net so that i use
C++ DLL in my C# application.
one of the structs in C++ is something like
typedef struct mystruct {....} mystruct1, *mystruct2;
since typedef is used, mystruct1 and *mystruct2 are aliases to mystruct.
how can i acheive the same (i.e aliasses in c#)? i can subtitute mystruct1 and *mystruct2 in the C# namespace (which i am creating) by mystruct. but i am not sure if they are used in the DLL?
your help is greatly appreciated. i am new to DLL and C#
thanks

 

[Mattias Sjögren]

how can i acheive the same (i.e aliasses in c#)? i can subtitute mystruct1 and *mystruct2 in the C# namespace (which i am creating) by mystruct. but i am not sure if they are used in the DLL?

Once the C++ code is compiled, the names are not important anymore.
What matters is that your C# structs have the same memory layout as
the original C++ struct, you can then name it anything you want.



Mattias

 

[Sahil Malik]

First, you cannot have *mystruct2 in C#. C# doesn't have pointers. And no
you still can't do pointer to struct, though you can do AddressOf
(FunctionName). Thats about the only pointer like thing you have in C#/.NET.
That is hella useful for our equivalent of callback functions.

Secondly structs in C# are very different from structs in C++. In C++ a
struct is a class with all members public, in C# a struct is a value type
which is always declared inline/stack (versus heap in C++). It is not a
class in C#.

What you really need is a class, not a struct. .. and atleast I donot know
of a way to do *LPMyStruct1, though maybe if I saw the actual code .. I
could take a shot at it.

--
- Sahil Malik
Independent Consultant
You can reach me thru my blog at -
http://www.dotnetjunkies.com/weblog/sahilmalik/

Hi,
i know that typedef structs creates an aliases for a particular struct in C++.
i m trying to convert .h c++ files to a namespace in C#.net so that i use
C++ DLL in my C# application.
one of the structs in C++ is something like
typedef struct mystruct {....} mystruct1, *mystruct2;
since typedef is used, mystruct1 and *mystruct2 are aliases to mystruct.
how can i acheive the same (i.e aliasses in c#)? i can subtitute mystruct1

and *mystruct2 in the C# namespace (which i am creating) by mystruct. but i
am not sure if they are used in the DLL?

 

[Mattias Sjögren]

First, you cannot have *mystruct2 in C#. C# doesn't have pointers.

Yes it does.

And no
you still can't do pointer to struct, though you can do AddressOf
(FunctionName).

AddressOf is a VB keyword.



Mattias

 

[Sahil Malik]

Allright new EventHandler ..

How do you have pointers in C#?

- Sahil Malik
Independent Consultant
You can reach me thru my blog - http://dotnetjunkies.com/WebLog/sahilmalik/

 

[John Doe]

Allright new EventHandler ..

How do you have pointers in C#?

unsafe {
double foo, *p;

p = &foo;
*p = 5;
}

look familiar?

 

[Sahil Malik]

Oh man .. yes the unsafe keyword. .. now that rings a bell.

Thanks

- SM