www.digitalmars.com         C & C++   DMDScript  

digitalmars.D.learn - Mixing D and C - Windows

reply "DNewbie" <run3 myopera.com> writes:
C program loads D dll
or
D program loads C dll
Is it possible?

-- 
  
  D
Dec 31 2011
parent reply "Jakob Ovrum" <jakobovrum gmail.com> writes:
On Saturday, 31 December 2011 at 19:05:44 UTC, DNewbie wrote:

 C program loads D dll
 or
 D program loads C dll
 Is it possible?



Both are possible.

Here's how to create a DLL in D, usable from C:

http://dlang.org/dll.html

As for loading C symbols in a DLL from a D program, you must link 
against an import library of the DLL, and create an interface 
module (similar to a header file) with the C declarations. For 
example, if this is your C DLL:

-----------
#include <stdio.h>

__declspec(dllexport) void sayHello(const char* name)
{
    printf("hello, %s!", name);
}
-----------

Then your D interface module should look like this:
-----------
extern(C) void sayHello(const char* name);

-----------

The import library must be in the OMF format. The easiest way to 
get such an import library is to use the `impllib` tool which can 
be downloaded from here:

http://ftp.digitalmars.com/bup.zip
Dec 31 2011
parent Exec <dragon-x gmx.de> writes:
Jakob Ovrum Wrote:

 As for loading C symbols in a DLL from a D program, you must link 
 against an import library of the DLL, and create an interface 
 module (similar to a header file) with the C declarations.



http://msdn.microsoft.com/en-us/library/windows/desktop/ms684175%28v=vs.85%29.aspx
Dec 31 2011