Re: Question on C++ Thread Class and inheritance/polymorphism withPOSIX pthread

[Ian Collins]

Chris M. Thomasson wrote:

>
"Ian Collins" <ian-news@hotmail.co mwrote in message
news:6mmgf1Fgdr 8lU11@mid.indiv idual.net...

>alexroat wrote:

>>private:
>> static void * gate(void *);//access point for pthread_create

>>
>This should be an extern "C" linkage function, not a static member.

>
[...]
>
Yes. Humm... Well, FWIW, I guess one can take advantage of compiler
specific extensions here. It's a dirty thing, but I think it would work.
Something like:
>
#if defined(_MSC_VE R)
# define DECLSPEC_CDECL __cdecl
#elif defined(__GNUC_ _)
# define DECLSPEC_CDECL __attribute__(( cdecl))
#else
# error MSVC or GCC REQUIRED!!!!! ;^(...
#endif
>

Why bother with all that nonsense when there is a standard solution?

--
Ian Collins

[Chris M. Thomasson]

Re: Question on C++ Thread Class and inheritance/polymorphism with POSIX pthread


"Ian Collins" <ian-news@hotmail.co mwrote in message
news:6mmqrkFgdr 8lU17@mid.indiv idual.net...

Chris M. Thomasson wrote:

>>
>"Ian Collins" <ian-news@hotmail.co mwrote in message
>news:6mmgf1Fgd r8lU11@mid.indi vidual.net...

>>alexroat wrote:

>

>>>private:
>>> static void * gate(void *);//access point for pthread_create
>>>
>>This should be an extern "C" linkage function, not a static member.

>>
>[...]
>>
>Yes. Humm... Well, FWIW, I guess one can take advantage of compiler
>specific extensions here. It's a dirty thing, but I think it would work.
>Something like:
>>
>#if defined(_MSC_VE R)
># define DECLSPEC_CDECL __cdecl
>#elif defined(__GNUC_ _)
># define DECLSPEC_CDECL __attribute__(( cdecl))
>#else
># error MSVC or GCC REQUIRED!!!!! ;^(...
>#endif
>>

Why bother with all that nonsense when there is a standard solution?

Agreed. However, using the non-standard compiler specific hack can eliminate
the "need" to use a base-class for the thread class. The extern "C"
free-function has no idea what type what will be passed to it. This is not
the case for the hack version...