freeze-stat.js

var posix = require("posix"),
  print = require("sys").puts,
  successes = {},
  // number of files to inspect on each pass
  N = 10,
  // degree of concurrency
  C = 5,
  // print lots of stuff, or just a little?
  verbose = true,
  // use a timeout, or call synchronously
  doTimeout = false;

for (var i = 0; i < C; i ++) statLoop(i);

function success (i) { return function () {
  print("=== success "+i);
  delete(successes[i]);
  var fail = false;
  for (var k in successes) {
    return;
  }
  print("IT WORKED!!");
}};

function statLoop (i) {
  successes[i] = false;
  var j = i * N;
  statLoopInner();
  
  function done () {
    if (verbose) print("||| done "+j);
    var fn = (j < ((i+1)*N)) ? statLoopInner : success(i);
    if (doTimeout) setTimeout(fn);
    else fn();
  };
  function statLoopInner () {
    j++;
    if (verbose) print("<<< open "+j);
    posix.stat("file-" + j).addErrback(done).addCallback(done)
  };
};