celluloid/nio4r — pull request #40 by hsbt (2014-03-18 12:14:12+00:00)
Title: Support Ruby 2.1

TRAP_BEG/TRAP_END and rb_thread_blocking_region is removed from Ruby 2.2.0. I fixed build error and use rb_thread_call_without_gvl instead of rb_thread_blocking_region.