Method do_write_request

src/test/msgr/test_async_networkstack.cc:861–901

    }

    void do_write_request() {
      if (dead)
        return ;

      while (!buffers.empty()) {
        bufferlist bl;
        auto it = buffers.begin();
        for (size_t i = 0; i < buffers.size(); ++i) {
          bl.push_back(bufferptr((char*)it->data(), it->size()));
          ++it;
        }

        ssize_t r = socket.send(bl, false);
        std::cerr << " server " << this << " send " << r << std::endl;
        if (r == 0)
          break;
        ASSERT_TRUE(r >= 0);
        while (r > 0) {
          ASSERT_TRUE(!buffers.empty());
          string &buffer = buffers.front();
          if (r >= (int)buffer.size()) {
            r -= (int)buffer.size();
            buffers.pop_front();
          } else {
           std::cerr << " server " << this << " sent " << r << std::endl;
            buffer = buffer.substr(r, buffer.size());
            break;
          }
        }
      }
      if (buffers.empty()) {
        if (write_enabled) {
          center->delete_file_event(socket.fd(), EVENT_WRITABLE);
          write_enabled = false;
        }
      } else if (!write_enabled) {
        ASSERT_EQ(0, center->create_file_event(
                  socket.fd(), EVENT_WRITABLE, &write_ctxt));
        write_enabled = true;
      }
    }

    bool finish() {
     return dead;