https://codereview.qt-project.org/c/qt/qtbase/+/489239
I have a patch to show my idea. I think it is worthwhile, you can provide an exists thread to QtConcurrent::run, isn't run the function in a new thread always. ________________________________ From: Volker Hilsheimer <volker.hilshei...@qt.io> Sent: Saturday, June 10, 2023 00:05 To: Macieira, Thiago <thiago.macie...@intel.com>; JiDe Zhang <zc...@live.com>; development@qt-project.org <development@qt-project.org> Subject: Re: [Development] Execute a function in the specified existing thread On 9 Jun 2023, at 02:00, Thiago Macieira <thiago.macie...@intel.com> wrote: On Wednesday, 7 June 2023 19:18:02 PDT JiDe Zhang wrote: please make sure your contribution uses QMetaCallEvent. Why uses QMetaCallEvent? I don't know how to make the function arguments to void** for QMetaCallEvent constructor. Maybe I can use QAbstractMetaCallEvent. My point is that a contribution to QtCore should use the most efficient method of getting the job done without undue complexity. That means I can accept inefficiencies provided they make the code more readable & maintainable than otherwise would have been, but not if they aren't justified. As of https://codereview.qt-project.org/c/qt/qtbase/+/469799, creating a QMetaCallEvent is pretty straight-forward. And creating the QCallableObject needed for that is also easier by the makeSlotObject helper, see https://codereview.qt-project.org/c/qt/qtbase/+/475547. It’s still requires working with private APIs, but there’s a reason those APIs exist, and that they are private - there are many cases you want to support (functors and lambdas, member-function-pointers, free functions, move-only functors etc). Volker
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