1 files changed, 6 insertions, 0 deletions
diff --git a/lib/rainbows.rb b/lib/rainbows.rb
index 04d5ebc..2faf3c8 100644
--- a/lib/rainbows.rb
+++ b/lib/rainbows.rb
@@ -30,6 +30,12 @@ module Rainbows
    G = State.new(true, 0, 0, 5)
    O = {}
    class Response416 < RangeError; end
+
+  # map of numeric file descriptors to IO objects to avoid using IO.new
+  # and potentially causing race conditions when using /dev/fd/
+  FD_MAP = {}
+  FD_MAP.compare_by_identity if FD_MAP.respond_to?(:compare_by_identity)
+
    # :startdoc:
  
    require 'rainbows/const'