QtConcurrentRun calls non-qt function

[sharethl]

[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.

[SGaist]

Can you also show your call to QtConcurrentRun ?

[sharethl]

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;
}@

[SGaist]

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

[sharethl]

_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?

[SGaist]

What does the backtrace of a crash tell you ?

[sharethl]

you mean stack trace?

two lines of ??

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

[SGaist]

Are you running a debug build ?

[sharethl]

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

Yes

[SGaist]

Ok, then what does the debugger tell you ?