Method ThreadLocal

scripts/perf-counters/src/thread-local.h:478–486

* Constructor that has to be called from a thread-neutral place. */

   * Constructor that has to be called from a thread-neutral place.
   */
  ThreadLocal() : m_key(0) {
#ifdef __APPLE__
    ThreadLocalCreateKey(&m_key, nullptr);
    ThreadLocalCreateKey(&m_cleanup_key,
                         ThreadLocalOnThreadExit<darwin_pthread_handler>);
#else
    ThreadLocalCreateKey(&m_key, ThreadLocalOnThreadExit<T>);
#endif
  }

  T *get() const {
    T *obj = (T*)pthread_getspecific(m_key);