resurrect Kgio.autopush support in pure Ruby

This avoids breaking compatibility for existing apps, but
is less performant (although safer and more resilient to future
changes in Ruby) than the previous C version.

1 files changed, 8 insertions, 2 deletions

diff --git a/lib/kgio.rb b/lib/kgio.rb
index f192074..2b420b0 100644
--- a/lib/kgio.rb
+++ b/lib/kgio.rb
@@ -17,14 +17,20 @@ module Kgio
   # :wait_writable when waiting for a read is required.
   WaitWritable = :wait_writable
 
-  # autopush is no-op nowadays
+  # autopush is strongly not recommended nowadays, use MSG_MORE instead
   @autopush = false
 
   class << self
-    attr_accessor :autopush # :nodoc:
+    attr_reader :autopush # :nodoc:
     def autopush? # :nodoc:
       !!@autopush
     end
+
+    def autopush=(bool) # :nodoc:
+      # No require_relative, we remain 1.8-compatible
+      require 'kgio/autopush'
+      @autopush = bool
+    end
   end
 end