Hi, I have been using a mechanism to emulate [thread_local] storage for some time now. However, I am aware of boost.thread has thread local heap. The difference is with thread_local emulator we have similar c++0x syntax working seemlessly. for example: thread_local <int> tlocal_integer(-1); // assign the global thread_local value void foo(int i) { *tlocal_integer = i; std::cout << this_thread::get_id() << " : " << *tlocal_integer << endl; } int main() { boost::thread_group tg; for(int i=1;i<500;i++) tg.create_thread(bind(&::foo, i)); *tlocal_integer = 0; std::cout << "main : " << *tlocal_integer << endl; tg.join_all(); return 0; } Wondering if anyone is interested into porting this to boost???