minor: Added TCPSocket Class w/ pool accessor

Sockets now know what pool they were checked out from
SSLSocket updated as well

lib/mongo.rb

@@ -61,6 +61,7 @@ module Constants
 require 'mongo/util/pool_manager'
 require 'mongo/util/server_version'
 require 'mongo/util/ssl_socket'
+require 'mongo/util/tcp_socket'
 require 'mongo/util/uri_parser'
 
 require 'mongo/collection'

lib/mongo/connection.rb

@@ -537,7 +537,7 @@ def setup(opts)
       if @ssl
         @socket_class = Mongo::SSLSocket
       else
-        @socket_class = ::TCPSocket
+        @socket_class = Mongo::TCPSocket
       end
 
       # Authentication objects

lib/mongo/util/pool.rb

@@ -167,6 +167,7 @@ def checkout_new_socket
       begin
         socket = self.connection.socket_class.new(@host, @port)
         socket.setsockopt(Socket::IPPROTO_TCP, Socket::TCP_NODELAY, 1)
+        socket.pool = self
       rescue => ex
         socket.close if socket
         raise ConnectionFailure, "Failed to connect to host #{@host} and port #{@port}: #{ex}"

lib/mongo/util/ssl_socket.rb

@@ -7,6 +7,8 @@ module Mongo
   # mirroring Ruby's TCPSocket, vis., TCPSocket#send and TCPSocket#read.
   class SSLSocket
 
+    attr_accessor :pool
+
     def initialize(host, port)
       @socket = ::TCPSocket.new(host, port)
       @ssl = OpenSSL::SSL::SSLSocket.new(@socket)
@@ -33,6 +35,5 @@ def read(length, buffer)
     def close
       @ssl.close
     end
-
   end
 end

lib/mongo/util/tcp_socket.rb

@@ -0,0 +1,6 @@
+module Mongo
+ class TCPSocket < ::TCPSocket
+   attr_accessor :pool
+
+ end
+end