thread destructors in C++0x vs boost

Question

These days I am reading the pdf Designing MT programs . It explains that the user MUST explicitly call detach() on an object of class std::thread i

Answer 1

Here's one way to implement RAII threads.

#include 
#include 

void run() { /* thread runs here */ }

struct ThreadGuard
{
    operator()(std::thread* thread) const
    {
        if (thread->joinable())
            thread->join(); // this is safe, but it blocks when scoped_thread goes out of scope
        //thread->detach(); // this is unsafe, check twice you know what you are doing
        delete thread;
    }
}

auto scoped_thread = std::unique_ptr(new std::thread(&run), ThreadGuard());

If you want to use this to detach a thread, read this first.