And if you can make sense of that...

The only explanation I can find to that code is that 

(*Perl_IStdIO_ptr(((PerlInterpreter *)Perl_get_context())))->pStderr

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returns a function pointer, and the next parenthesized expresion, 
((*Perl_IStdIO_ptr((( PerlInterpreter* ) Perl_get_context()))))

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are the arguments for calling that function.

It's no wonder function calls are slow in perl. Some single lines of XS code end up calling Perl_get_context() 7 or 8 times. There has to be a better way

Well, yes, there is a better way!... at least for XS, I don't know about Inline::C, though probably not.

You have to start your XS files defining the macro ... 

#define PERL_NO_GET_CONTEXT 1

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... and then pass the Perl context manually from function to function using pTHX, aTHX, pTHX_ and aTHX_. See perlguts for the details.

In reply to Re^3: Inline C: using stderr segfaults? by salva
in thread Inline C: using stderr segfaults? by BrowserUk

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