Update connection_pool to subclass BasicObject

This makes it a more effective proxy.

Changes.md

@@ -0,0 +1,5 @@
+HEAD
+--------
+
+- More precise timeouts
+- ConnectionPool now subclasses BasicObject so `method_missing` is more effective.

README.md

@@ -5,6 +5,12 @@ Generic connection pooling for Ruby.
 
 MongoDB has its own connection pool.  ActiveRecord has its own connection pool.  This is a generic connection pool that can be used with anything, e.g. Redis, Dalli and other Ruby network clients.
 
+Requirements
+--------------
+
+connection_pool requires Ruby 1.9 because it uses BasicObject.
+
+
 Install
 ------------
 

lib/connection_pool.rb

@@ -23,18 +23,17 @@ require 'connection_pool/timed_queue'
 # - :size - number of connections to pool, defaults to 5
 # - :timeout - amount of time to wait for a connection if none currently available, defaults to 5 seconds
 #
-class ConnectionPool
+class ConnectionPool < BasicObject
   DEFAULTS = { :size => 5, :timeout => 5 }
 
-  undef :type if defined?(type)
+  def initialize(options={}, &block)
+    ::Kernel.raise ::ArgumentError, 'Connection pool requires a block' unless block
 
-  def initialize(options={})
+    @available = ::TimedQueue.new
-    raise ArgumentError, 'Connection pool requires a block' unless block_given?
+    @oid = @available.object_id
-
-    @available = TimedQueue.new
     @options = DEFAULTS.merge(options)
     @options[:size].times do
-      @available << yield
+      @available << block.call
     end
   end
 
@@ -54,14 +53,14 @@ class ConnectionPool
   private
 
   def checkout
-    Thread.current[:"current-#{self.object_id}"] ||= begin
+    ::Thread.current[:"current-#{@oid}"] ||= begin
       @available.timed_pop(@options[:timeout])
     end
   end
 
   def checkin
-    conn = Thread.current[:"current-#{self.object_id}"]
+    conn = ::Thread.current[:"current-#{@oid}"]
-    Thread.current[:"current-#{self.object_id}"] = nil
+    ::Thread.current[:"current-#{@oid}"] = nil
     return unless conn
     @available << conn
     nil