多线程析构过程出现卡住或者core dump 可能的原因

sometime our project can run into some seem strange problem during we delete someobj , some of the code are .a static library file that we can't check it's code.

we currently use singleton to do a proxy job to avoid this core dump problem. ----- we only delete them when the system goes shut down  

can ref to this article:

http://www.cnblogs.com/Solstice/archive/2010/02/10/dtor_meets_threads.html