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-Duseperlio - something for the brave to try

Nick Ing-Simmons
October 29, 2000 14:09
-Duseperlio - something for the brave to try
Message ID:

Attached is a patch relative to bleadperl (Jarkko do not apply patch,
when we are ready "p4 integrate -r perlio").

It stops -Duseperlio being a wrapper on stdio and instead implements
the PerlIO abstraction in a stdio-like manner itself.

It does _NOT_ yet do line disciplines or anything "cool" but it does 
pass "make test" on my Linux machine. Running two "make tests" at once
- one with it on and one with normal Linux stdio seem to run in step
so performance is not too bad.

It should avoid the 256 FILE * limit if that is one of your care-abouts.

I would like to know if it builds/works on other systems in case I have
botched use of 'Configure' variables or accidentally relied on 
Linux-ish glibc features.

I expect the error cases need more work.

Now I have a "basis" I plan to start mutating it into what we really want.
The first stage of that is to add "line disciplines" akin to sfio's 
but perhaps with a more perl-ish feel - and in particular the 
"unread" scheme I was waffling on about a week or three back.
I am less sure that we should change/augment API to pass in SVs 
(changing would break XS code, augmenting means (presumably) that SV
route calls the non-SV layer which is a (minor) speed disadvantage).

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