FAQ
I would like to write a function that cannot run two times in the same time.
If someone try to execute it twice (or more), it will wait.

For example, myFunc writing to DB, I don't want too much writing on the
same time.


*myFunc.js:*
module.exports.myFunc=
function() {
// Do some heavy CPU
}

*main.js:*
myFunc=require('myFunc').myFunc

require('async')
$.parallel([
function () {myFunc()},
function () {myFunc()}
]);


How can I change only the MyFunc.js file, to disable the option to run it
twice in the same time.


Thank you.

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