Safely interrupt a script/function

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Daniel
Daniel on 14 Jun 2021
Answered: Daniel on 15 Jun 2021
I have a script which loops through an array and performs an action for each itetation which takes several seconds. Also, at the beginning of the script, a driver is loaded which has to be properly unloaded in order to not crash the hardware. Problem is that if you accidentally create a large array, you are stuck with two options: Either you Ctrl+C and go do the old unplug-replug, or you wait for 40h. Both are not feasable. Is there a way, then, to call a function upon the user terminating the program?

Accepted Answer

Daniel
Daniel on 15 Jun 2021
As Walter suggested, onCleanup seems to be the most elegant solution

More Answers (1)

Jan
Jan on 14 Jun 2021
You can open a small window, which contains a stop button. Pressing this button sets a local variable, which can be checked from your code. Catch errors with an error handling:
% [UNTESTED CODE]
function yourCode
FigH = figure('UserData', 0);
ButtonH = uicotrol('Style', 'PushButton', 'String', 'Stop', ...
'Callback', @StopCallback;)
try
resource = reserveYourResource();
for k = 1:1e6
drawnow;
if ~ishandle(FigH) || FigH.UserData
% Figure closed or stop button pressed:
disp('Stopped by user');
break
end
% Some dummy code:
pause(2)
disp(clock)
end
catch ME
disp('Stopped by error')
end
releaseResource(resuource);
end
function StopCallback(ButtonH, EventH)
FigH = ancestor(ButtonH, 'figure');
FigH.UserData = 1;
end

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