Data commit

Task/Synchronous-concurrency/Ruby/synchronous-concurrency-1.rb

@@ -0,0 +1,3 @@
+count = 0
+IO.foreach("input.txt") { |line| print line; count += 1 }
+puts "Printed #{count} lines."

Task/Synchronous-concurrency/Ruby/synchronous-concurrency-2.rb

@@ -0,0 +1,12 @@
+count = 0
+reader = Fiber.new do
+  IO.foreach("input.txt") { |line| Fiber.yield line }
+  puts "Printed #{count} lines."
+  nil
+end
+
+# printer
+while line = reader.resume
+  print line
+  count += 1
+end

Task/Synchronous-concurrency/Ruby/synchronous-concurrency-3.rb

@@ -0,0 +1,15 @@
+require 'continuation' unless defined? Continuation
+
+count = 0
+reader = proc do |cont|
+  IO.foreach("input.txt") { |line| cont = callcc { |cc| cont[cc, line] }}
+  puts "Printed #{count} lines."
+  cont[nil]
+end
+
+# printer
+while array = callcc { |cc| reader[cc] }
+  reader, line = array
+  print line
+  count += 1
+end

Task/Synchronous-concurrency/Ruby/synchronous-concurrency-4.rb

@@ -0,0 +1,26 @@
+require 'thread'
+
+counts = Queue.new
+lines = Queue.new
+reader = Thread.new do
+  begin
+    File.foreach("input.txt") { |line| lines << line }
+    lines << :EOF
+    puts "Printed #{counts.pop} lines."
+  ensure
+    lines << nil
+  end
+end
+
+# writer
+count = 0
+while line = lines.pop
+  case line
+  when String
+    print line
+    count += 1
+  when :EOF
+    counts << count
+  end
+end
+reader.join