How do I get a thread ID from an arbitrary pthread_t?

Question

I have a pthread_t, and I\'d like to change its CPU affinity. The problem is that I\'m using glibc 2.3.2, which doesn\'t have pthread_setaffinity_np(). That\'s OK, though, b

Answer 1

In glibc 2.24 the pthread_t returned is just the pointer to an opaque struct pthread. You can look up the definition in nptl/descr.h.