twitst4tz

twitter statistics web application
Log | Files | Refs | README | LICENSE

async.js (599B)

      1 var defer = require('./defer.js');
      2 
      3 // API
      4 module.exports = async;
      5 
      6 /**
      7  * Runs provided callback asynchronously
      8  * even if callback itself is not
      9  *
     10  * @param   {function} callback - callback to invoke
     11  * @returns {function} - augmented callback
     12  */
     13 function async(callback)
     14 {
     15   var isAsync = false;
     16 
     17   // check if async happened
     18   defer(function() { isAsync = true; });
     19 
     20   return function async_callback(err, result)
     21   {
     22     if (isAsync)
     23     {
     24       callback(err, result);
     25     }
     26     else
     27     {
     28       defer(function nextTick_callback()
     29       {
     30         callback(err, result);
     31       });
     32     }
     33   };
     34 }