multithreading - Detect thread end

Question

How can I detect when a thread was ended (in a platform independent way)? I have to store copies of objects for every thread and I want to know when I can dispose or redistribute it.

Answer 1

It's possibly via RAII and local_thread mechanism. We create a class that do usefull work in destructor.

class ThreadEndNotifer
{
public:
    ~ThreadEndNotifer()
    {
        // Do usefull work
        useFullWork();
    }
}

Next, we create local_thread variable. It can be global or class feild(thread_local class field is implicit static).

class Foo 
{
private:
    // Remember about initialization like static feild
    thread_local ThreadEndNotifer mNotifer; 
}

So, the useFullWork will be called every time when any thread are ending. I like to create one global variable and init it only if needed, in this way I avoid overhead.