Remove Truffle::Channel now that Queue can do pop(timeout:)

Author: eregon

lib/truffle/timeout.rb

@@ -83,15 +83,15 @@ def abort
     end
   end
 
-  @chan = Truffle::Channel.new
+  @chan = Queue.new
 
   def self.watch_channel
     reqs = []
 
     loop do
       begin
         while reqs.empty?
-          req = @chan.receive
+          req = @chan.pop
           reqs << req if req
         end
 
@@ -101,7 +101,7 @@ def self.watch_channel
         if min.left > 0
           before = Time.now
 
-          new_req = @chan.receive_timeout(min.left)
+          new_req = @chan.pop(timeout: min.left)
 
           slept_for = Time.now - before
         else

spec/truffle/objspace/define_finalizer_spec.rb

@@ -27,17 +27,17 @@
   #   The assumption is that this works as expected but is just hard to test.
 
   it "will call the finalizer" do
-    channel = Truffle::Channel.new
+    queue = Queue.new
     finalizer = proc {
-      channel.send :finalized
+      queue << :finalized
     }
     Object.new.tap do |object|
       ObjectSpace.define_finalizer object, finalizer
       ObjectSpace.reachable_objects_from(object).should include(finalizer)
     end
     Primitive.gc_force
     Truffle::Debug.drain_finalization_queue   # Not needed for correctness
-    channel.receive_timeout(TIME_TOLERANCE).should == :finalized
+    queue.pop(timeout: TIME_TOLERANCE).should == :finalized
   end
 
 end

spec/truffle/objspace/undefine_finalizer_spec.rb

@@ -17,10 +17,10 @@
   # See comment in define_finalizer_spec.rb
 
   it "successfully unregisters a finalizer" do
-    channel = Truffle::Channel.new
+    queue = Queue.new
     Object.new.tap do |object|
       finalizer = proc {
-        channel.send :finalized
+        queue << :finalized
       }
       ObjectSpace.define_finalizer object, finalizer
       ObjectSpace.reachable_objects_from(object).should include(finalizer)
@@ -29,7 +29,7 @@
     end
     Primitive.gc_force
     Truffle::Debug.drain_finalization_queue               # Not needed for correctness
-    channel.try_receive.should be_nil
+    queue.should.empty?
   end
 
 end

src/main/java/org/truffleruby/core/CoreLibrary.java

@@ -946,7 +946,6 @@ public boolean isTruffleBootMainMethod(SharedMethodInfo info) {
             "/core/pre.rb",
             "/core/basic_object.rb",
             "/core/array.rb",
-            "/core/channel.rb",
             "/core/configuration.rb",
             "/core/false.rb",
             "/core/fiber.rb",