Add fast-path for accessing the current thread id

Accessing the thread id is often used in profiling and debugging, as
well as some approaches for sound single-threaded access to data.

Currently the only way to access the thread id is by first obtaining a
handle to the current thread. While this is not exactly slow, it does
require an atomic inc-ref and dec-ref operation, as well as the
injection of `Thread`'s drop code into the caller.

This publicly exposes the existing fast-path for accessing the current
thread id.

0 files changed, 0 insertions, 0 deletions