text: /******************************************************************************
   *                       ____    _    _____                                   *
   *                      / ___|  / \  |  ___|    C++                           *
   *                     | |     / _ \ | |_       Actor                         *
   *                     | |___ / ___ \|  _|      Framework                     *
   *                      \____/_/   \_|_|                                      *
   *                                                                            *
   * Copyright (C) 2011 - 2017                                                  *
   * Dominik Charousset <dominik.charousset (at) haw-hamburg.de>                *
   *                                                                            *
   * Distributed under the terms and conditions of the BSD 3-Clause License or  *
   * (at your option) under the terms and conditions of the Boost Software      *
   * License 1.0. See accompanying files LICENSE and LICENSE_ALTERNATIVE.       *
   *                                                                            *
   * If you did not receive a copy of the license files, see                    *
   * http://opensource.org/licenses/BSD-3-Clause and                            *
   * http://www.boost.org/LICENSE_1_0.txt.                                      *
   ******************************************************************************/
  
  #include "caf/io/scribe.hpp"
  
  #include "caf/logger.hpp"
  
  namespace caf {
  namespace io {
  
  scribe::scribe(connection_handle conn_hdl) : scribe_base(conn_hdl) {
    // nop
  }
  
  scribe::~scribe() {
    CAF_LOG_TRACE("");
  }
  
  message scribe::detach_message() {
    return make_message(connection_closed_msg{hdl()});
  }
  
  bool scribe::consume(execution_unit* ctx, const void*, size_t num_bytes) {
    CAF_ASSERT(ctx != nullptr);
    CAF_LOG_TRACE(CAF_ARG(num_bytes));
    if (detached())
      // we are already disconnected from the broker while the multiplexer
      // did not yet remove the socket, this can happen if an I/O event causes
      // the broker to call close_all() while the pollset contained
      // further activities for the broker
      return false;
    // keep a strong reference to our parent until we leave scope
    // to avoid UB when becoming detached during invocation
    auto guard = parent_;
    auto& buf = rd_buf();
    CAF_ASSERT(buf.size() >= num_bytes);
    // make sure size is correct, swap into message, and then call client
    buf.resize(num_bytes);
    auto& msg_buf = msg().buf;
    msg_buf.swap(buf);
    auto result = invoke_mailbox_element(ctx);
    // swap buffer back to stream and implicitly flush wr_buf()
    msg_buf.swap(buf);
    flush();
    return result;
  }
  
  void scribe::data_transferred(execution_unit* ctx, size_t written,
                                size_t remaining) {
    CAF_LOG_TRACE(CAF_ARG(written) << CAF_ARG(remaining));
    if (detached())
      return;
    using transferred_t = data_transferred_msg;
    using tmp_t = mailbox_element_vals<data_transferred_msg>;
    tmp_t tmp{strong_actor_ptr{}, message_id::make(),
              mailbox_element::forwarding_stack{},
              transferred_t{hdl(), written, remaining}};
    invoke_mailbox_element_impl(ctx, tmp);
    //data_transferred_msg tmp{hdl(), written, remaining};
    //auto ptr = make_mailbox_element(nullptr, invalid_message_id, {}, tmp);
    //parent()->context(ctx);
    //parent()->consume(std::move(ptr));
  }
  
  void scribe::io_failure(execution_unit* ctx, network::operation op) {
    CAF_LOG_TRACE(CAF_ARG(hdl()) << CAF_ARG(op));
    // keep compiler happy when compiling w/o logging
    static_cast<void>(op);
    detach(ctx, true);
  }
  
  } // namespace io
  } // namespace caf
  