Sergey Sharybin
2f722f1a49
This allows us to avoid TLS stored in pool which gives us advantage of using pre-allocated tasks pool for the pools created from non-main thread. Even on systems with slow pthread TLS it should not be a problem because we access it once at a pool construction time. If we want to use this more often (for example, to get rid of push_from_thread) we'll have to do much more accurate benchmark.