Add bin and edit workflow

bin/gems/concurrent-ruby-1.3.5/lib/concurrent-ruby/concurrent/synchronization/volatile.rb

@@ -0,0 +1,101 @@
+require 'concurrent/utility/native_extension_loader' # load native parts first
+require 'concurrent/utility/engine'
+require 'concurrent/synchronization/full_memory_barrier'
+
+module Concurrent
+  module Synchronization
+
+    # Volatile adds the attr_volatile class method when included.
+    #
+    # @example
+    #   class Foo
+    #     include Concurrent::Synchronization::Volatile
+    #
+    #     attr_volatile :bar
+    #
+    #     def initialize
+    #       self.bar = 1
+    #     end
+    #   end
+    #
+    #  foo = Foo.new
+    #  foo.bar
+    #  => 1
+    #  foo.bar = 2
+    #  => 2
+    #
+    # @!visibility private
+    module Volatile
+      def self.included(base)
+        base.extend(ClassMethods)
+      end
+
+      def full_memory_barrier
+        Synchronization.full_memory_barrier
+      end
+
+      module ClassMethods
+        if Concurrent.on_cruby?
+          def attr_volatile(*names)
+            names.each do |name|
+              ivar = :"@volatile_#{name}"
+              class_eval <<-RUBY, __FILE__, __LINE__ + 1
+                def #{name}
+                  #{ivar}
+                end
+
+                def #{name}=(value)
+                  #{ivar} = value
+                end
+              RUBY
+            end
+            names.map { |n| [n, :"#{n}="] }.flatten
+          end
+
+        elsif Concurrent.on_jruby?
+          def attr_volatile(*names)
+            names.each do |name|
+              ivar = :"@volatile_#{name}"
+
+              class_eval <<-RUBY, __FILE__, __LINE__ + 1
+                def #{name}
+                  ::Concurrent::Synchronization::JRubyAttrVolatile.instance_variable_get_volatile(self, :#{ivar})
+                end
+
+                def #{name}=(value)
+                  ::Concurrent::Synchronization::JRubyAttrVolatile.instance_variable_set_volatile(self, :#{ivar}, value)
+                end
+              RUBY
+
+            end
+            names.map { |n| [n, :"#{n}="] }.flatten
+          end
+
+        else
+          warn 'Possibly unsupported Ruby implementation' unless Concurrent.on_truffleruby?
+
+          def attr_volatile(*names)
+            names.each do |name|
+              ivar = :"@volatile_#{name}"
+
+              class_eval <<-RUBY, __FILE__, __LINE__ + 1
+                def #{name}
+                  ::Concurrent::Synchronization.full_memory_barrier
+                  #{ivar}
+                end
+
+                def #{name}=(value)
+                  #{ivar} = value
+                  ::Concurrent::Synchronization.full_memory_barrier
+                end
+              RUBY
+            end
+
+            names.map { |n| [n, :"#{n}="] }.flatten
+          end
+        end
+      end
+
+    end
+  end
+end