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don't skip next PFH if current one is removed while iterating through #950

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merged 3 commits into from Jul 23, 2018
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18 changes: 12 additions & 6 deletions addons/common/fnc_removePerFrameHandler.sqf
Expand Up @@ -29,13 +29,19 @@ if (_handle < 0 || {_handle >= count GVAR(PFHhandles)}) exitWith {};
[{
params ["_handle"];

GVAR(perFrameHandlerArray) deleteAt (GVAR(PFHhandles) select _handle);
GVAR(PFHhandles) set [_handle, nil];
GVAR(perFrameHandlerArray) set [GVAR(PFHhandles) select _handle select 0, {}];
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Fun fact. call doesn't exit early if it has no code. It will actually really build a callstack and everything required. And then execute the empty code and exit right after.

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I wouldn't have implemented it any other way tbh. For simplicity.


{
_x params ["", "", "", "", "", "_handle"];
GVAR(PFHhandles) set [_handle, _forEachIndex];
} forEach GVAR(perFrameHandlerArray);
[{
params ["_handle"];

GVAR(perFrameHandlerArray) deleteAt (GVAR(PFHhandles) select _handle);
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@commy2 Yeah reading again after a sleep I don't think it would break anymore (since this line becomes deleteAt nil on any duplicated calls - which I assume won't error?).

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The only exception would be, if you were to remove the same handle twice in the same frame and also addEventHandler in the next frame, would it be possible that the same index (_handle) could be refilled in between the two execNextFrame calls? Resulting in the newly added EH being deleted immediately.

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This is all changed now.

GVAR(PFHhandles) set [_handle, nil];

{
_x params ["", "", "", "", "", "_handle"];
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reusing _handle here looks confusing to some people. But these people don't look at CBA code anyway.

(I pressed send review and wanted to submit the comment after that.. But who could've guessed that the comment is discarded when you submit the review.)

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I just indented the previous code. The function is simple enough I'd say.

GVAR(PFHhandles) set [_handle, _forEachIndex];
} forEach GVAR(perFrameHandlerArray);
}, _handle] call CBA_fnc_execNextFrame;
}, _handle] call CBA_fnc_directCall;

nil