Method TopicLock

phxqueue/scheduler/schedulermgr.h:240–244

class TopicLock {
  public:
    TopicLock() {
        rwlock = new pthread_rwlock_t;
        pthread_rwlock_init(rwlock, nullptr);
        QLVerb("init rwlock");
    }

    // noncopyable
    TopicLock(const TopicLock &) = delete;