I tried the following:

use strict ;
use warnings ;

use Inline (Config => DIRECTORY => "$ENV{HOME}/PLIB/INLINE") ;
use Inline 'C';

open my $fh, ">", "test.txt" ;
my $rc = my_puts($fh) ;
close $fh ;
print "\$rc = $rc\n" ;

__END__

__C__

int my_puts(PerlIO* fh) {
  return PerlIO_puts(fh, "Hello World !!\n") ;
} ;

[download]
and got the expected non-negative return code and the file test.txt ended up containing "Hello World !!\n"...

...I regret I cannot say why your attempt to output to a fastcgi stream is failing... but I can confirm that it is generally possible to use PerlIO "file handles", and output via the PerlIO_xxx API as suggested. It's worth noting that PerlIO_puts has arguments in the opposite order to fputs -- but looks pretty straightforward otherwise. I guess there could be something peculiar about the $out file handle you have... Wish I could help more.

In reply to Re^5: Inline C + IO::Handle by gone2015
in thread FCGI + Inline::C fast stream out! by mrakus

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