Thread Affinity structure

Hi all, I have doubt regarding how the thread affinity (to processor) is defined in a process (task). If there is only single thread in a process, then when process calls itself on binding to a core, will let run on that core forever. But, what if there are multiple threads, in a process (task). If the main thread calls set affinity to a core, is it going to get inherited to all other threads, or just the calling thread in a task. What happens when forked a process with threads that has affinity to a core. Please can anyone point me to the literature on this. Thanks in advance. -- Regards, Sri.