Executing time for a Matlab function in parallel

I am currently working on parallel timing function, as a timing threshold, that can be applied to the main function. A maximum running time is needed. Once the threshold is reached, the main function would break and enter the next loop. My original idea was to call `timer` from another independent function so that a parallel function would be possible. But it fails to do so.

    function timeStop()
    time = cputime;
    time = cputime-time;
    a = timer;
    set (a, 'executionMode', 'fixedRate')
    set (a,'timerfcn','disp(time)')
    start(a)
    timeStop = time;
    end

Then calling this `timeStop`,

    function fucx()
    for i = 1:3
        for j = 1:3
            for k = 1:3
                try
                    %MainFuc()

                    timeStop
                    if (timeStop>60) % in seconds
                        disp('RunOutOfTime: Program terminated');
                        stop(a)
                        break;
                    end;

                catch
                    %%Err()
                end
            end
         end
    end
    end

It is a huge collection of model setting, study, and solutions in `MainFunc()`, without loops. I was thinking about directly putting the `tic/toc` function into the `MainFuc()`. But I am not sure whether MATLAB internally would work the way that I want it to. Because I do not know which step or code line the infinite time was trapped in `MainFunc()`. I cannot simply put the `tic/toc` function with it if it is not determined in parallel.

I have considered using `tic/toc`, but I was told that internally MATLAB would only know the running time after the full execution of `MainFuc()`. I am not sure if this is true, but found posts with a similar meaning in different locations.