Method set_many_empty

include/dmlc/concurrentqueue.h:1548–1565

    // Returns true if the block is now empty (does not apply in explicit context).
    template<InnerQueueContext context>
    inline bool set_many_empty(index_t i, size_t count) {
      if (context == explicit_context && BLOCK_SIZE <= EXPLICIT_BLOCK_EMPTY_COUNTER_THRESHOLD) {
        // Set flags
        std::atomic_thread_fence(std::memory_order_release);
        i = BLOCK_SIZE - 1 - static_cast<size_t>(i & static_cast<index_t>(BLOCK_SIZE - 1)) - count +
            1;
        for (size_t j = 0; j != count; ++j) {
          assert(!emptyFlags[i + j].load(std::memory_order_relaxed));
          emptyFlags[i + j].store(true, std::memory_order_relaxed);
        }
        return false;
      } else {
        // Increment counter
        auto prevVal = elementsCompletelyDequeued.fetch_add(count, std::memory_order_release);
        assert(prevVal + count <= BLOCK_SIZE);
        return prevVal + count == BLOCK_SIZE;
      }
    }

    template<InnerQueueContext context>
    inline void set_all_empty() {