Example Attached

[Mike Parker]

Heinz wrote:
> torhu Wrote:
> 
>> On 10.02.2009 19:51, Heinz wrote:
>>> Heinz Wrote:
>>>
>>> I attached a rar file with the sources just to see what i'm talking about. The example is from the DMD site. Included is the extern D (ok) and the extern C (fails). To compile open "compile.bat" and to run the programs use "run.bat".
>> Try this:
>> alias extern (C) void function(void*) MyDLL_Initialize_fp;
>> alias extern (C) void function() MyDLL_Terminate_fp;
>> alias extern (C) MyClass function() getMyClass_fp;
> 
> Haha! cool man, thanx, it works.
> I never though it could be the type but adding extern(C), the program treats variables as C function pointers. I had no idea at all that i can create extern(C) variables to be trated as C type. I learned something new today!
> Thanks again.
> 

It doesn't affect normal variables. Calling a function through a 
function pointer, the calling convention still must be known in order 
for parameters to be properly passed. So any time you define a function 
pointer to point to a C function or to pass to a C API as a callback, it 
must have the proper extern linkage.