Require Ruby 2.3+ and drop Ruby 2.2 support

* Set `required_ruby_version` to 2.3.
* `rb_data_object_alloc()` is deprecated since a long time
  by `rb_data_object_wrap()` but that is not available in Ruby 2.2,
  so drop Ruby 2.2 support.

.github/workflows/ci.yml

@@ -8,7 +8,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: [2.2, 2.3, 2.4, 2.5, 2.6, 2.7, '3.0', 3.1, jruby, truffleruby]
+        ruby: [2.3, 2.4, 2.5, 2.6, 2.7, '3.0', 3.1, jruby, truffleruby]
 
     env:
       JAVA_OPTS: '-Xmx1024m'

CHANGELOG.md

@@ -1,5 +1,8 @@
 ## Current
 
+* (#975) Set the Ruby compatibility version at 2.3
+* (#972) Remove Rubinius-related code
+
 ## Release v1.1.10
 
 concurrent-ruby:

README.md

@@ -259,7 +259,7 @@ be obeyed though. Features developed in `concurrent-ruby-edge` are expected to m
 
 ## Supported Ruby versions
 
-* MRI 2.2 and above
+* MRI 2.3 and above
 * Latest JRuby 9000
 * Latest TruffleRuby
 

concurrent-ruby-edge.gemspec

@@ -23,7 +23,7 @@ be obeyed though. Features developed in `concurrent-ruby-edge` are expected to m
 Please see http://concurrent-ruby.com for more information.
   TXT
 
-  s.required_ruby_version = '>= 2.2'
+  s.required_ruby_version = '>= 2.3'
 
   s.add_runtime_dependency 'concurrent-ruby', "~> #{Concurrent::VERSION}"
 end

concurrent-ruby-ext.gemspec

@@ -21,7 +21,7 @@ Gem::Specification.new do |s|
   s.require_paths    = ['lib']
   s.extensions       = 'ext/concurrent-ruby-ext/extconf.rb'
 
-  s.required_ruby_version = '>= 2.2'
+  s.required_ruby_version = '>= 2.3'
 
   s.add_runtime_dependency 'concurrent-ruby', "= #{Concurrent::VERSION}"
 end

concurrent-ruby.gemspec

@@ -27,5 +27,5 @@ Gem::Specification.new do |s|
   TXT
   s.metadata["source_code_uri"] = "https://github.com/ruby-concurrency/concurrent-ruby"
   s.metadata["changelog_uri"] = "https://github.com/ruby-concurrency/concurrent-ruby/blob/master/CHANGELOG.md"
-  s.required_ruby_version = '>= 2.2'
+  s.required_ruby_version = '>= 2.3'
 end

lib/concurrent-ruby/concurrent/utility/engine.rb

@@ -7,10 +7,6 @@ def on_jruby?
         RUBY_ENGINE == 'jruby'
       end
 
-      def on_jruby_9000?
-        on_jruby? && ruby_version(JRUBY_VERSION, :>=, 9, 0, 0)
-      end
-
       def on_cruby?
         RUBY_ENGINE == 'ruby'
       end

spec/concurrent/executor/ruby_thread_pool_executor_spec.rb

@@ -157,36 +157,34 @@ def eventually(mutex: nil, timeout: 5, &block)
       end
     end
 
-    if Concurrent.on_cruby? && Concurrent.ruby_version(:>=, 2, 3, 0)
-      context 'threads naming' do
-        subject do
-          opts = { min_threads: 2 }
-          opts[:name] = pool_name if pool_name
-          described_class.new(opts)
-        end
+    context 'threads naming' do
+      subject do
+        opts = { min_threads: 2 }
+        opts[:name] = pool_name if pool_name
+        described_class.new(opts)
+      end
 
-        let(:names) { Concurrent::Set.new }
+      let(:names) { Concurrent::Set.new }
 
-        before do
-          subject.post(names) { |names| names << Thread.current.name }
-          subject.post(names) { |names| names << Thread.current.name }
-          subject.shutdown
-          subject.wait_for_termination(pool_termination_timeout)
-          expect(names.size).to eq 2
-        end
+      before do
+        subject.post(names) { |names| names << Thread.current.name }
+        subject.post(names) { |names| names << Thread.current.name }
+        subject.shutdown
+        subject.wait_for_termination(pool_termination_timeout)
+        expect(names.size).to eq 2
+      end
 
-        context 'without pool name' do
-          let(:pool_name) { }
-          it 'sets counted name' do
-            expect(names.all? { |name| name =~ /^worker-\d+$/ }).to be true
-          end
+      context 'without pool name' do
+        let(:pool_name) { }
+        it 'sets counted name' do
+          expect(names.all? { |name| name =~ /^worker-\d+$/ }).to be true
         end
+      end
 
-        context 'with pool name' do
-          let(:pool_name) { 'MyExecutor' }
-          it 'sets counted name' do
-            expect(names.all? { |name| name =~ /^MyExecutor-worker-\d+$/ }).to be true
-          end
+      context 'with pool name' do
+        let(:pool_name) { 'MyExecutor' }
+        it 'sets counted name' do
+          expect(names.all? { |name| name =~ /^MyExecutor-worker-\d+$/ }).to be true
         end
       end
     end