Merge pull request rails#24146 from matthewd/latch-as-proxy

Don't inherit from Concurrent::CountDownLatch

Author: matthewd

activesupport/lib/active_support/concurrency/latch.rb

@@ -2,17 +2,24 @@
 
 module ActiveSupport
   module Concurrency
-    class Latch < Concurrent::CountDownLatch
+    class Latch
 
       def initialize(count = 1)
-        ActiveSupport::Deprecation.warn("ActiveSupport::Concurrency::Latch is deprecated. Please use Concurrent::CountDownLatch instead.")
-        super(count)
+        if count == 1
+          ActiveSupport::Deprecation.warn("ActiveSupport::Concurrency::Latch is deprecated. Please use Concurrent::Event instead.")
+        else
+          ActiveSupport::Deprecation.warn("ActiveSupport::Concurrency::Latch is deprecated. Please use Concurrent::CountDownLatch instead.")
+        end
+
+        @inner = Concurrent::CountDownLatch.new(count)
       end
 
-      alias_method :release, :count_down
+      def release
+        @inner.count_down
+      end
 
       def await
-        wait(nil)
+        @inner.wait(nil)
       end
     end
   end