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Home » Community » Newbie corner » WhenAction() -> ProcessEvents() -> WhenAction() -> hang, crash :-) (I'm probably stretching reentrancy of the GUI callbacks too far)

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Re: WhenAction() -> ProcessEvents() -> WhenAction() -> hang, crash :-) [message #52839 is a reply to message #52838]

Mon, 09 December 2019 08:55

mirek is currently offline

mirek
Messages: 13975
Registered: November 2005

Ultimate Member

- latch should work. I am doing that approach all the time. "REENTRANT" is irrelevant, reentrant code always works (there is a lot of reentrancy everywhere in U++)
- from user perspective, you should also disable the button and reenable at the end of task, but I recommend to keep latch (I call them "lock") anyway
- I usually make lock as counter
- From what you wrote (maybe I have missread), you are not running that task as background thread. In that case, Mutex is not likely to help you.

In short: latch/lock should work, if it does not, look for problem elsewhere.

Posting testcase would help Smile

Smile

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[Message index]

		WhenAction() -> ProcessEvents() -> WhenAction() -> hang, crash :-) By: xrysf03 on Sun, 08 December 2019 15:21
		Re: WhenAction() -> ProcessEvents() -> WhenAction() -> hang, crash :-) By: koldo on Sun, 08 December 2019 16:22
		Re: WhenAction() -> ProcessEvents() -> WhenAction() -> hang, crash :-) By: xrysf03 on Sun, 08 December 2019 20:57
		Re: WhenAction() -> ProcessEvents() -> WhenAction() -> hang, crash :-) By: mirek on Mon, 09 December 2019 08:55
		Re: WhenAction() -> ProcessEvents() -> WhenAction() -> hang, crash :-) By: Oblivion on Mon, 09 December 2019 12:00

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