One obvious place to look for PerlIO implementations.

p4raw-id: //depot/perl@21295

diff --git a/pod/perliol.pod b/pod/perliol.pod
index 8a41917..eb6433a 100644 (file)
--- a/pod/perliol.pod
+++ b/pod/perliol.pod
@@ -736,6 +736,12 @@ look at the existing perlio layer implementations, which include:
 
 =item * C implementations
 
+The F<perlio.c> and F<perliol.h> in the Perl core implement the
+"unix", "perlio", "stdio", "crlf", "utf8", "byte", "raw", "pending"
+layers, and also the "mmap" and "win32" layers if applicable.
+(The "win32" is currently unfinished and unused, to see what is used
+instead in Win32, see L<PerlIO/"Querying the layers of filehandles"> .)
+
 PerlIO::encoding, PerlIO::scalar, PerlIO::via in the Perl core.
 
 PerlIO::gzip and APR::PerlIO (mod_perl 2.0) on CPAN.