> At April-08-11, 3:56 AM, Vlad Khorsun wrote:
>
>>> And, I've just learned that the new
>>> Delphi 64-bit compiler(hopefully released later this year) will only
>>> use fastcall for DLL interfaces(even Microsoft has that same
>>> restriction for 64-bit).
>
>> Where can i read about it ? Because i doubt fastcall is *only* supported
>> calling convention in Win64. Moreover, in COM. According to MSDN __fastcall
>> is MS-specific while COM have more wide scope. So, there is no possibility to
>> use anything else then stdcall in IUnknown despite of 32\64 bitness.
>
> https://forums.codegear.com/thread.jspa?threadID=52117
> http://msdn.microsoft.com/en-us/library/ms235286.aspx
> http://www.embarcadero.com/products/delphi/64-bit (Here it is
> mentioned in the video presentation that only one calling convention
> will be supported in 64-bit, but unfortunately doesn't specifically
> mention which one. Which is where the speculation of fastcall/register
> originates, as mentioned in the Delphi forum thread, most likely
> because of the MSDN documentation.)
>
> And, here's another document that I found:
> http://www.agner.org/optimize/calling_conventions.pdf
> Look on page 16, in the paragraph starting with "Calling convention",
> the last line refers to 64-bit mode.
Thanks. But, if this is true : "In 64 bit mode, there is only one calling
convention for each
operating system" then we have no problem with interfaces despite of
compiler\language
on x64 systems. I have no doubt it is true on Windows and modern Linuxes but
have no
idea about HPUX, AIX, Solaris, etc...
Regards,
Vlad
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