Parallel boolean functions in Elixir

parbool.ex

defmodule Parbool do
  require Process
  def or_(task1, task2) do
    parent = self
    pid1 = spawn(fn -> send parent, task1.() end)
    pid2 = spawn(fn -> send parent, task2.() end)
    receive do
      false ->
        receive do
          result2 -> 
            Process.exit pid1, :kill
            Process.exit pid2, :kill
            result2
        end
      true -> 
        Process.exit pid1, :kill
        Process.exit pid2, :kill
        true
    end
  end
  def and_(task1, task2) do
    parent = self
    pid1 = spawn(fn -> send parent, task1.() end)
    pid2 = spawn(fn -> send parent, task2.() end)
    receive do
      true ->
        receive do
          result2 -> 
            Process.exit pid1, :kill
            Process.exit pid2, :kill
            result2
        end
      false -> 
        Process.exit pid1, :kill
        Process.exit pid2, :kill
        false
    end  
  end
  def xor_(task1, task2) do
    parent = self
    pid1 = spawn(fn -> send parent, task1.() end)
    pid2 = spawn(fn -> send parent, task2.() end)
    receive do
      result1 ->
        receive do
          result2 -> 
            Process.exit pid1, :kill
            Process.exit pid2, :kill
            (result2 or result1) and not (result1 and result2)
        end
    end
  end  
end

This small module provides an implementation of or and and in parallel and using short-circuit evaluation. It can shutdown the remaining computation if the first one returns and short-circuits the operator.