Method wait

src/bthread/condition_variable.h:58–60

    native_handler_type native_handler() { return &_cond; }

    void wait(std::unique_lock<bthread::Mutex>& lock) {
        bthread_cond_wait(&_cond, lock.mutex()->native_handler());
    }

    void wait(std::unique_lock<bthread_mutex_t>& lock) {
        bthread_cond_wait(&_cond, lock.mutex());