Synchronous execution of asynchronous function using async/await

gistfile1.txt

#!/usr/bin/env node

let success = 'success';
let failure = 'failure';
var callCount = 0;

async function runSyncAsync() {
  console.log('runSyncAsync');
  let resCallCount = 0;
  let success = 4;
  while (resCallCount != undefined && resCallCount < 4) {
    resCallCount = await run();
  }
  return success == resCallCount;

  // return [r1,r2,r3,r4]; // Important! Otherwise it will return some bizarre object
  // { '0': {},
  //   '1':
  //   { [Function: require]
  //     resolve: [Function: resolve],
  //     main:
  //     Module {
  //       id: '.',
  //       exports: {},
  //       parent: null,
  //       filename: '/Users/htmldrum/code/javascript/engine.js',
  //       loaded: true,
  //       children: [],
  //       paths: [Array] },
  //     extensions: { '.js': [Function], '.json': [Function], '.node': [Function] },
  //     cache: { '/Users/htmldrum/code/javascript/engine.js': [Object] } },
  //   '2':
  //   Module {
  //     id: '.',
  //     exports: {},
  //     parent: null,
  //     filename: '/Users/htmldrum/code/javascript/engine.js',
  //     loaded: true,
  //     children: [],
  //     paths:
  //     [ '/Users/htmldrum/code/javascript/node_modules',
  //       '/Users/htmldrum/code/node_modules',
  //       '/Users/htmldrum/node_modules',
  //       '/Users/node_modules',
  //       '/node_modules' ] },
  //   '3': '/Users/htmldrum/code/javascript/engine.js',
  //   '4': '/Users/htmldrum/code/javascript' }
};

function run() {
  return new Promise((resolve, reject) => {
    setTimeout(() => {
      callcbSucc(resolve);
    }, 500);
  });
}

function callcbSucc(fn) {
  callCount++;
  console.log("callCount: ", callCount);
  fn(callCount);
}

function callcbFail(fn) {
  fn(failure);
}

runSyncAsync()
  .then(x => {
    console.log("Resolved with: ", x);
  }).catch(reason => {
    console.log("Failed with reason: ", reason);
  });

With promises

#!/usr/bin/env node

let success = 'success';
let failure = 'failure';
var callCount = 0;

function runSyncAsync() {
  return new Promise((resolve, reject) => {
    try {
      let resCallCount = 0;
      let success = 4;
      var sempahore = true;
      while (resCallCount != undefined && resCallCount < 4) {
        if(sempahore == true) {
          sempahore = false;
          run().then(retCallCount => {
            resCallCount = retCallCount;
            sempahore = true;
          });
        };
      }
      resolve(success == resCallCount);
    } catch(e) {
      reject(e);
    };
  });
}

function run() {
  return new Promise((resolve, reject) => {
    setTimeout(() => {
      callcbSucc(resolve);
    }, 500);
  });
}

function callcbSucc(fn) {
  callCount++;
  fn(callCount);
}

function callcbFail(fn) {
  fn(failure);
}

runSyncAsync()
  .then(x => {
    console.log("Resolved with: ", x);
  }).catch(reason => {
    console.log("Failed with reason: ", reason);
  });