Method decStrong

binderlib/include_android9/utils/LightRefBase.h:39–44

        mCount.fetch_add(1, std::memory_order_relaxed);
    }
    inline void decStrong(__attribute__((unused)) const void* id) const {
        if (mCount.fetch_sub(1, std::memory_order_release) == 1) {
            std::atomic_thread_fence(std::memory_order_acquire);
            delete static_cast<const T*>(this);
        }
    }
    //! DEBUGGING ONLY: Get current strong ref count.
    inline int32_t getStrongCount() const {
        return mCount.load(std::memory_order_relaxed);