Re: [Firebird-devel] Reference counters in API

[Alex P. <pes...@ma...>]

 On 04/08/11 19:00, Adriano dos Santos Fernandes wrote:
> On 08-04-2011 11:25, Vlad Khorsun wrote:
>>> 08.04.2011 15:42, Vlad Khorsun wrote:
>>>>      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.
>>>   Yep, if forget that current FB API, implemented in current fbclient.dll use stdcall and 
>>> thus Delphi 64 won't be able to work with it. And if you change this calling convention to 
>>> fastcall, all programs that already work with 64-bits client will be broken.
>>     In Win64 stdcall is the same as thiscall, cdecl, register, fastcall, anythingelsecall. 
>>
>>     Do you know that all Win32 API declared with stdcall ? Are you going to say that Delphi 
>> Win64 applications wiil not be able to work with Win32 API  at all ? :-D
>>
>>     There is no problem with calling conventions on x64 systems between modules by different
>> compilers as log as all compilers vendors follow the same rules about fastcall. And it seems 
>> they follow.
>>
> If fastcall can handle functions with variable number of arguments,
> there is no problem then.
>

Yes, it can. It stores first 4 (on linux 6) arguments in registers, the
rest are stored on stack using cdecl conventions.