_SC_READER_WRITER_LOCKS  208 ext/etc/constdefs.h #if !defined(_SC_READER_WRITER_LOCKS)
_SC_READER_WRITER_LOCKS  210 ext/etc/constdefs.h #  define _SC_READER_WRITER_LOCKS _SC_READER_WRITER_LOCKS
_SC_READER_WRITER_LOCKS 1064 ext/etc/constdefs.h #if defined(_SC_READER_WRITER_LOCKS)
_SC_READER_WRITER_LOCKS 1065 ext/etc/constdefs.h     rb_define_const(mod, "SC_READER_WRITER_LOCKS", INTEGER2NUM(_SC_READER_WRITER_LOCKS));