Worried about a possbile race condition

[PAlexC]

I'm a bit concerned that an app I'm working on may have a race condition that I won't be able to test.

The main code looks like this:

wlc.scorm.LMSInitialize = function(p) { 
	this.getAPI(p);
	return this.API.LMSInitialize(p);
};

The getAPI funciton looks like this:

wlc.scorm.getAPI = function() {
	
	function searchWin(win) {
		while((win.API == null) && (win.parent != null) && (win.parent != win) && (wlc.scorm.findAttempts <= wlc.scorm.findLimit)){
			wlc.scorm.findAttempts++;
			win = win.parent;
		}
		if (win.API != null) {
			return win.API;
		} else {
			return null;
		}	
	}
	
	this.API = searchWin(window);		
	if(	(this.API == null) && (window.opener != null) && (typeof(window.opener) != "undefined") ){
		this.API = searchWin(window.opener);
	}		
	if(this.API == null) {
		this.API = wlc.nullAPI;
	}
};

I need to be absolutely sure that the 2nd statement in LMSInitialize won't execute until getAPI finishes executing.

There's no way that could happen, right?