delayed_plugin_initialization.h

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/* Copyright (c) 2016, 2023, Oracle and/or its affiliates.
 
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License, version 2.0,
   as published by the Free Software Foundation.
 
   This program is also distributed with certain software (including
   but not limited to OpenSSL) that is licensed under separate terms,
   as designated in a particular file or component or in included license
   documentation.  The authors of MySQL hereby grant you an additional
   permission to link the program and your derivative works with the
   separately licensed software that they have included with MySQL.
 
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License, version 2.0, for more details.
 
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */
 
#ifndef DELAYED_PLUGIN_INITIALIZATION_INCLUDE
#define DELAYED_PLUGIN_INITIALIZATION_INCLUDE
 
#include "plugin/group_replication/include/plugin_utils.h"
 
class Delayed_initialization_thread {
 public:
  Delayed_initialization_thread();
 
  /**
    The class destructor
  */
  ~Delayed_initialization_thread();
 
  /**
    The thread handler.
 
    @retval 0      OK
    @retval !=0    Error
  */
  int initialization_thread_handler();
 
  /**
    Initialize a thread where the plugin services will be initialized
 
    @return the operation status
      @retval 0      OK
      @retval !=0    Error
  */
  int launch_initialization_thread();
 
  /**
    Signals the plugin initialization thread that the server is ready.
  */
  void signal_thread_ready();
 
  /**
    Wait for the initialization thread to do its job.
  */
  void wait_for_thread_end();
 
  /**
    Signal that the read mode is set on the server.
  */
  void signal_read_mode_ready();
 
  /**
    Wait for the read mode to be set by the thread process.
  */
  void wait_for_read_mode();
 
 private:
  // Delayed_initialization_thread variables
 
  /* Delayed_initialization_thread state */
  thread_state delayed_thd_state;
 
  /* Is the server ready*/
  bool is_server_ready;
 
  /* Is the read mode already set*/
  bool is_super_read_only_set;
 
  /* Thread related structures */
 
  my_thread_handle delayed_init_pthd;
  // run conditions and locks
  mysql_mutex_t run_lock;
  mysql_cond_t run_cond;
  mysql_mutex_t server_ready_lock;
  mysql_cond_t server_ready_cond;
};
 
#endif /* DELAYED_PLUGIN_INITIALIZATION_INCLUDE */