cosock.channels.lua

local cosock = require "cosock"

local tx1, rx1 = cosock.channel.new()
local tx2, rx2 = cosock.channel.new()
cosock.spawn(function()
  print('1 started')
  assert(rx2:receive())
  print('1 exiting')
  tx1:send(1)
end)

cosock.spawn(function()
  print('2 started')
  tx2:send(1)
  assert(rx1:receive())
  print('2 exiting')
end)
-- This prints
-- 1 started
-- 2 started
-- 1 exiting
-- 2 exiting
cosock.run()