1 files changed, 0 insertions, 100 deletions
diff --git a/ruby_1_8_6/lib/weakref.rb b/ruby_1_8_6/lib/weakref.rb
deleted file mode 100644
index 591819c948..0000000000
--- a/ruby_1_8_6/lib/weakref.rb
+++ /dev/null
@@ -1,100 +0,0 @@
-require "delegate"
-
-# WeakRef is a class to represent a reference to an object that is not seen by
-# the tracing phase of the garbage collector.  This allows the referenced
-# object to be garbage collected as if nothing is referring to it. Because
-# WeakRef delegates method calls to the referenced object, it may be used in
-# place of that object, i.e. it is of the same duck type.
-#
-# Usage:
-#
-#   foo = Object.new
-#   foo = Object.new
-#   p foo.to_s			# original's class
-#   foo = WeakRef.new(foo)
-#   p foo.to_s			# should be same class
-#   ObjectSpace.garbage_collect
-#   p foo.to_s			# should raise exception (recycled)
-class WeakRef<Delegator
-
-  # RefError is raised if an object cannot be referenced by a WeakRef.
-  class RefError<StandardError
-  end
-
-  @@id_map =  {}                # obj -> [ref,...]
-  @@id_rev_map =  {}            # ref -> obj
-  @@final = lambda{|id|
-    __old_status = Thread.critical
-    Thread.critical = true
-    begin
-      rids = @@id_map[id]
-      if rids
-	for rid in rids
-	  @@id_rev_map.delete(rid)
-	end
-	@@id_map.delete(id)
-      end
-      rid = @@id_rev_map[id]
-      if rid
-	@@id_rev_map.delete(id)
-	@@id_map[rid].delete(id)
-	@@id_map.delete(rid) if @@id_map[rid].empty?
-      end
-    ensure
-      Thread.critical = __old_status
-    end
-  }
-
-  # Create a new WeakRef from +orig+.
-  def initialize(orig)
-    super
-    __setobj__(orig)
-  end
-
-  # Return the object this WeakRef references. Raises RefError if the object
-  # has been garbage collected.  The object returned is the object to which
-  # method calls are delegated (see Delegator).
-  def __getobj__
-    unless @@id_rev_map[self.__id__] == @__id
-      raise RefError, "Illegal Reference - probably recycled", caller(2)
-    end
-    begin
-      ObjectSpace._id2ref(@__id)
-    rescue RangeError
-      raise RefError, "Illegal Reference - probably recycled", caller(2)
-    end
-  end
-
-  def __setobj__(obj)
-    @__id = obj.__id__
-    __old_status = Thread.critical
-    begin
-      Thread.critical = true
-      unless @@id_rev_map.key?(self)
-        ObjectSpace.define_finalizer obj, @@final
-        ObjectSpace.define_finalizer self, @@final
-      end
-      @@id_map[@__id] = [] unless @@id_map[@__id]
-    ensure
-      Thread.critical = __old_status
-    end
-    @@id_map[@__id].push self.__id__
-    @@id_rev_map[self.__id__] = @__id
-  end
-
-  # Returns true if the referenced object still exists, and false if it has
-  # been garbage collected.
-  def weakref_alive?
-    @@id_rev_map[self.__id__] == @__id
-  end
-end
-
-if __FILE__ == $0
-  require 'thread'
-  foo = Object.new
-  p foo.to_s			# original's class
-  foo = WeakRef.new(foo)
-  p foo.to_s			# should be same class
-  ObjectSpace.garbage_collect
-  p foo.to_s			# should raise exception (recycled)
-end