I'm writing a module, Parallel::Loops, that now uses IO::Select on a pipe's handles. However select only works on windows for sockets. And perlport says that: 
       select  Only implemented on sockets. (Win32, VMS)
               Only reliable on sockets. (RISC OS)
I guess I could test for Win32 || VMS || RISC_OS somehow (by finding what $^O is on all those platforms?). But that is brittle. Is there "a better way" to judge whether select works without having to fork and without it costing (too much) runtime? ($Config{d_select} eq 'define') seems to be true for both linux and Windows, unhelpfully.

In reply to How to test for reliable select()? by Lightknight

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