Thank you for answering my question patiently.
My program built with qt4.3.1,and a lot of things have been done by other people,I am afraid I can not change it to upper version.but Q4.3.1 does not support Qt Concurrent.
I think I will manage the threads by myself ,but not Qt Concurrent.
My questions:
1.What should I do if I want to let Q4.3.1 support Qt Concurrent?
2. Can data type( class defined by user) be shared by threads?
Thank you.