[libc-commits] [libc] [libc] Add an extension macro to get numerical thread id (PR #195202)

[Petr Hosek via libc-commits]

petrhosek wrote:

For pthreads we could just implement `pthread_getthreadid_np()` since it's already supported by a number of different C library implementations, not just glibc, so at this point it's the de-facto standard (I'm not sure if we already have a plan for implementing other `_np` functions).

https://github.com/llvm/llvm-project/pull/195202