Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
branch: master
Fetching contributors…

Cannot retrieve contributors at this time

61 lines (40 sloc) 1.339 kb
weakling: a collection of weakref utilities for Ruby
== Summary ==
This library provides:
* a modified WeakRef implementation for JRuby that supports a reference queue
* a WeakRef::RefQueue class
* a weak-valued ID map to replace typical uses of _id2ref
In the future it may provide additional features like a generic WeakHash or other
reference types like soft and phantom references.
The weakling repository is at http://github.com/headius/weakling.
== Usage ==
Just require 'weakling'. It will require 'weakref' along with the refqueue JRuby
extension and the weakling/collections library containing the weak id hash.
== RefQueue Example ==
require 'weakling'
require 'java'
q = WeakRef::RefQueue.new
wr = WeakRef.new(Object.new, q)
puts "weakref object: #{wr.__id__}"
puts "running GC"
java.lang.System.gc
puts "weakref alive?: #{wr.weakref_alive?}"
puts "weakref object from queue: #{q.poll.__id__}"
== WeakRef::IdHash Example ==
require 'weakling'
wh = WeakRef::IdHash.new
ary = (1..10).to_a.map {Object.new}
ids = ary.map {|o| wh.add(o)}
puts "all items in weak_id_hash:"
ids.each {|i| puts "#{i} = #{wh[i]}"}
puts "dereferencing objects"
ary = nil
puts "forcing GC"
begin
require 'java'
java.lang.System.gc
rescue
GC.start
end
puts "all items in weak id hash:"
ids.each {|i| puts "#{i} = #{wh[i]}"}
Jump to Line
Something went wrong with that request. Please try again.