initial support for jruby+truffle

Author: pitr-ch

lib/concurrent/atomic_reference/jruby+truffle.rb

@@ -0,0 +1 @@
+require 'concurrent/atomic_reference/rbx'

lib/concurrent/synchronization/lockable_object.rb

@@ -10,7 +10,7 @@ module Synchronization
                                      MriMutexLockableObject
                                    when Concurrent.on_jruby?
                                      JRubyLockableObject
-                                   when Concurrent.on_rbx?
+                                   when Concurrent.on_rbx? || Concurrent.on_truffle?
                                      RbxLockableObject
                                    else
                                      warn 'Possibly unsupported Ruby implementation'

lib/concurrent/synchronization/object.rb

@@ -8,10 +8,9 @@ module Synchronization
                              MriObject
                            when Concurrent.on_jruby?
                              JRubyObject
-                           when Concurrent.on_rbx?
+                           when Concurrent.on_rbx? || Concurrent.on_truffle?
                              RbxObject
                            else
-                             warn 'Possibly unsupported Ruby implementation'
                              MriObject
                            end
     private_constant :ObjectImplementation

lib/concurrent/synchronization/rbx_lockable_object.rb

@@ -18,15 +18,13 @@ def synchronize(&block)
         if @__owner__ == Thread.current
           yield
         else
-          Rubinius.lock(self)
-          begin
+          result = nil
+          Rubinius.synchronize(self) do
             @__owner__ = Thread.current
-            result = yield
-          ensure
+            result     = yield
             @__owner__ = nil
-            Rubinius.unlock(self)
-            result
           end
+          result
         end
       end
 

lib/concurrent/utility/engine.rb

@@ -19,6 +19,10 @@ def on_rbx?
         ruby_engine == 'rbx'
       end
 
+      def on_truffle?
+        ruby_engine == 'jruby+truffle'
+      end
+
       def on_windows?
         !(RbConfig::CONFIG['host_os'] =~ /mswin|mingw|cygwin/).nil?
       end