Gives the pool the ability to be filled with existing resources.

lib/innertube.rb

@@ -61,6 +61,16 @@ def initialize(open, close)
       @pool = Set.new
     end
 
+    # Populate the pool with existing, open resources.
+    # @param [Array] An array of resources.
+    def fill(resources)
+      @lock.synchronize do
+        resources.each do |r|
+          @pool << Element.new(r)
+        end
+      end
+    end
+
     # On each element of the pool, calls close(element) and removes it.
     # @private
     def clear

spec/innertube_spec.rb

@@ -51,6 +51,20 @@ def wait_all(threads)
     pool_members.map { |e| e.object.first }.sort.should == [1,2,3,4]
   end
 
+  it 'should be fillable with existing resources' do
+    pool.fill(["Apple", "Banana", "Kiwi"])
+    pool_members.size.should == 3
+
+    pool.take do |x|
+      x.should eq('Apple') 
+      pool.take do |y|
+        y.should eq('Banana')
+        pool.take do |z|
+          z.should eq('Kiwi')
+        end
+      end
+    end
+  end
 
   it 'should unlock when exceptions are raised' do
     begin