I'll try run few QtConcurrent, on function which must change value:
void MyClass::parse_data_request(QVector<event_discription> &event_vec, QString list_events, QString num, QStringList &loc_key_collector, QStringList &loc_key_ru)
And run throw this:
QVector<QFuture<void> > threads(thread_counts);
for(int i = 0; i < thread_counts; i++)
{
threads[i] = QtConcurrent::run(this,&MyClass::parse_data_request, it_event[i], list_events[i], proxy[proxy_num + i],glob_key_collector[i], glob_key_ru[i]);
qDebug() << "Run thread No " << i;
}
for(int i = 0; i < thread_counts; i++)
{
threads[i].waitForFinished();
}
In function i append data to event_vec, but when
for(int i = 0; i < thread_counts; i++)
{
threads[i].waitForFinished();
}
is done, it_event[i],glob_key_collector[i]
and glob_key_ru[i]
doesn't change, they have zero elements. What am I doing wrong?
P.S.: QtConcurrent::run called in another function of MyClass
Thanks to @molbdnilo for marking my misunderstanding of QtConcurrent::run Working version:
threads[i] = QtConcurrent::run(this,&marathon_parser::parse_data_request, std::ref(it_event[i]), list_events[i], proxy[proxy_num + i],std::ref(glob_key_collector[i]), std::ref(glob_key_ru[i]));
QtConcurrent::run make copy of ALL arguments of the Function by value, in that way we must use std::ref to pass the reference.