On Mittwoch, 25. Januar 2023 16:41:26 CET Jaroslaw Kobus via Qt-creator wrote: > Hi, > > QtcProcess is a wrapper around QProcess. It has some advantages over the > QProcess: > > 1. On linux, when starting a new QProcess, the whole callee's application is > being forked. The bigger the application is, the longer the fork takes > place. And QtCreator is a really huge. So, QtcProcess comes with a > solution: all the processes are being started not directly by QtCreator, > but with helper application called qtcreator_processlauncher. All start > requests of all QtcProcesses are redirected to that application. Since > qtcreator_processlauncher is much smaller that QtCreator, processes start > faster. You may turn off this by behaviour by launching Creator with > QTC_USE_QPROCESS=true variable set - in this case the process launcher > won't be used, but QProcess directly. You may also hardcode the underlaying > implementation for your particular instance of QtcProcess by calling > QtcProcess::setProcessImpl(ProcessImpl::QProcess).
FTR: This got fixed upstream last year: https://codereview.qt-project.org/c/qt/qtbase/+/417829 > 2. When using QtcProcess it is also safe to destruct it while underlaying > QProcess is still being run. QtcProcess takes care about safe termination > through Utils::ProcessReaper in the background. What does this do other than terminating the process? How is this more safe? Can/should this be upstreamed to QtCore if it's such a general important improvement? > 3. There are much more advantages over bare QProcess, e.g. it enables > running applications on remote devices transparently. All you need to do is > to specify the remote FilePath to your executable inside > QtcProcess::setCommandLine() and that's all. > > I hope this helps > > Regards > > Jarek > > ________________________________________ > From: Qt-creator <qt-creator-boun...@qt-project.org> on behalf of Knut > Petter Svendsen via Qt-creator <qt-creator@qt-project.org> Sent: Wednesday, > January 25, 2023 4:22 PM > To: Qt-creator@qt-project.org > Subject: [Qt-creator] Utils::QtcProcess > > What's the idea with Utils::QtcProcess? Why does QtCreator use QtcProcess > over simply using QProcess? > > Also, when trying to debug a ClearCasePlugin which I haven't tested since > QtC 4.xx I'm having a hard time actually finding out where the command is > actually executed. I'm having problems with stepping in the code to find > out why the plugin is failing in my environment. > > In my own plugin I use QProcess and it works - is there any reason I > should start using the more complicated QtcProcess (which I'm having > problems with in ClearCasePlugin...) > > Knut > > _______________________________________________ > Qt-creator mailing list > Qt-creator@qt-project.org > https://lists.qt-project.org/listinfo/qt-creator -- Milian Wolff m...@milianw.de http://milianw.de
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