Obligatory CSP examples

pingPongInCSP.js

csp.go(function* () {
  // this routine acts 
  // like the referee
  var table = csp.chan();
  
  // two routines represents two players
  // they have access to the same channel
  csp.go(player, ["ping", table])
  csp.go(player, ["pong", table])
  
  yield csp.put(table, {hits: 0});
  // if a player fails to 
  // hits the ball after a second
  // the referee will close the channel
  // and the game will end
  yield csp.timeout(1000)
  table.close()
});

function* player(name, table) {
  while (true) {
    var ball = yield csp.take(table);
    if (ball === csp.CLOSED) {
      console.log(name + ": table's gone")
      return;
    }
    ball.hits += 1
    console.log(name + "" + ball.hits);
    // who ever takes the ball, puts it back
    // after 100ms for the other player to take
    yield csp.timeout(100)
    yield csp.put(table, ball)
  }
}