Function can_run_thread_local

src/bthread/bthread.cpp:300–303

Meet one of the three conditions, can run in thread local attr is nullptr tag equal to thread local tag equal to BTHREAD_TAG_INVALID

// tag equal to thread local
// tag equal to BTHREAD_TAG_INVALID
BUTIL_FORCE_INLINE bool can_run_thread_local(const bthread_attr_t* __restrict attr) {
    return attr == nullptr || attr->tag == bthread::tls_task_group->tag() ||
           attr->tag == BTHREAD_TAG_INVALID;
}

struct TidTraits {
    static const size_t BLOCK_SIZE = 63;