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QtConcurrentRun calls non-qt function

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  • S Offline
    S Offline
    sharethl
    wrote on last edited by
    #5

    [quote author="SGaist" date="1424727828"]You are trying to write on the same file descriptor from several thread at once ?[/quote]

    No, BRC is a class, and each BRC object has its own file descriptor.

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    • SGaistS Offline
      SGaistS Offline
      SGaist
      Lifetime Qt Champion
      wrote on last edited by
      #6

      Can you also show your call to QtConcurrentRun ?

      Interested in AI ? www.idiap.ch
      Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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      • S Offline
        S Offline
        sharethl
        wrote on last edited by
        #7

        Device manager contains two spectrometers,

        @bool DeviceManager::scan()
        {
        _meter0->scan(); // scan in parallel
        _meter1->scan(); // scan in parallel
        return true;
        }@
        @bool Spectrometer::scan()
        {
        _progress = 0;
        emit reportProgress(_progress);
        // this will run parallel
        QtConcurrent::run(this,&Spectrometer::doScanning);
        _isWorking=true;
        return true;
        }@

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        • SGaistS Offline
          SGaistS Offline
          SGaist
          Lifetime Qt Champion
          wrote on last edited by
          #8

          Then are you sure that _brc is properly allocated ? That both are no trying to access the same resources at the same time ?

          Interested in AI ? www.idiap.ch
          Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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          • S Offline
            S Offline
            sharethl
            wrote on last edited by
            #9

            _brc is a pointer in Spectrometer class.
            and I use new BRC() in Spectrometer's constructor.
            Works most of time.

            and during my app starts up, each _brc did communicate with their corresponding hardware successfully.

            Is it possible to allocate differently with same code but different runs?

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            • SGaistS Offline
              SGaistS Offline
              SGaist
              Lifetime Qt Champion
              wrote on last edited by
              #10

              What does the backtrace of a crash tell you ?

              Interested in AI ? www.idiap.ch
              Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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              • S Offline
                S Offline
                sharethl
                wrote on last edited by
                #11

                you mean stack trace?

                two lines of ??

                [quote author="SGaist" date="1424896978"]What does the backtrace of a crash tell you ?[/quote]

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                • SGaistS Offline
                  SGaistS Offline
                  SGaist
                  Lifetime Qt Champion
                  wrote on last edited by
                  #12

                  Are you running a debug build ?

                  Interested in AI ? www.idiap.ch
                  Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                  • S Offline
                    S Offline
                    sharethl
                    wrote on last edited by
                    #13

                    [quote author="SGaist" date="1424993803"]Are you running a debug build ?
                    [/quote]

                    Yes

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                    • SGaistS Offline
                      SGaistS Offline
                      SGaist
                      Lifetime Qt Champion
                      wrote on last edited by
                      #14

                      Ok, then what does the debugger tell you ?

                      Interested in AI ? www.idiap.ch
                      Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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