Hynopic Demos

Semaphore

/*
 * Hypnotic can be extended
 * Here we have a simple semaphore introduced
 * which supports only one producer/consumer
 */

// jQuery still works, of course!
function print(msg){ $('#output').html(msg); }

/*
 * Hypnotic extensions must be run outside Hypnotic!
 */
var semaphore_def = [' function SemaphoreOne() { };',
'SemaphoreOne.prototype = {',
'    wait: new Hypnotic(function(cb) { this.cb = cb; }),',
'    release: function() { if(this.cb) { setTimeout(this.cb, 1); this.cb = null; }}',
'}'];
window.eval(semaphore_def.join(''));

var sema = new SemaphoreOne();

$(document).on('keypress', function(){
  sema.release();
});

print('Press any key to continue.');
sema.wait(); // hmm... How can you do this without a sync sleep() ?
print('Got it!');