cleanup: remove Slave_log_event (unused since 2002)

Author: vuvova

sql/log_event.cc

@@ -1560,11 +1560,6 @@ Log_event* Log_event::read_log_event(const char* buf, uint event_len,
     case GTID_LIST_EVENT:
       ev = new Gtid_list_log_event(buf, event_len, description_event);
       break;
-#ifdef HAVE_REPLICATION
-    case SLAVE_EVENT: /* can never happen (unused event) */
-      ev = new Slave_log_event(buf, event_len, description_event);
-      break;
-#endif /* HAVE_REPLICATION */
     case CREATE_FILE_EVENT:
       ev = new Create_file_log_event(buf, event_len, description_event);
       break;
@@ -7874,11 +7869,6 @@ User_var_log_event::do_shall_skip(rpl_group_info *rgi)
 }
 #endif /* !MYSQL_CLIENT */
 
-
-/**************************************************************************
-  Slave_log_event methods
-**************************************************************************/
-
 #ifdef HAVE_REPLICATION
 #ifdef MYSQL_CLIENT
 void Unknown_log_event::print(FILE* file_arg, PRINT_EVENT_INFO* print_event_info)
@@ -7892,152 +7882,6 @@ void Unknown_log_event::print(FILE* file_arg, PRINT_EVENT_INFO* print_event_info
 }
 #endif  
 
-#ifndef MYSQL_CLIENT
-void Slave_log_event::pack_info(THD *thd, Protocol *protocol)
-{
-  char buf[256+HOSTNAME_LENGTH], *pos;
-  pos= strmov(buf, "host=");
-  pos= strnmov(pos, master_host, HOSTNAME_LENGTH);
-  pos= strmov(pos, ",port=");
-  pos= int10_to_str((long) master_port, pos, 10);
-  pos= strmov(pos, ",log=");
-  pos= strmov(pos, master_log);
-  pos= strmov(pos, ",pos=");
-  pos= longlong10_to_str(master_pos, pos, 10);
-  protocol->store(buf, pos-buf, &my_charset_bin);
-}
-#endif /* !MYSQL_CLIENT */
-
-
-#ifndef MYSQL_CLIENT
-/**
-  @todo
-  re-write this better without holding both locks at the same time
-*/
-Slave_log_event::Slave_log_event(THD* thd_arg,
-				 Relay_log_info* rli)
-  :Log_event(thd_arg, 0, 0) , mem_pool(0), master_host(0)
-{
-  DBUG_ENTER("Slave_log_event");
-  if (!rli->inited)				// QQ When can this happen ?
-    DBUG_VOID_RETURN;
-
-  Master_info* mi = rli->mi;
-  // TODO: re-write this better without holding both locks at the same time
-  mysql_mutex_lock(&mi->data_lock);
-  mysql_mutex_lock(&rli->data_lock);
-  master_host_len = strlen(mi->host);
-  master_log_len = strlen(rli->group_master_log_name);
-  // on OOM, just do not initialize the structure and print the error
-  if ((mem_pool = (char*)my_malloc(get_data_size() + 1,
-                                   MYF(MY_WME))))
-  {
-    master_host = mem_pool + SL_MASTER_HOST_OFFSET ;
-    memcpy(master_host, mi->host, master_host_len + 1);
-    master_log = master_host + master_host_len + 1;
-    memcpy(master_log, rli->group_master_log_name, master_log_len + 1);
-    master_port = mi->port;
-    master_pos = rli->group_master_log_pos;
-    DBUG_PRINT("info", ("master_log: %s  pos: %lu", master_log,
-                        (ulong) master_pos));
-  }
-  else
-    sql_print_error("Out of memory while recording slave event");
-  mysql_mutex_unlock(&rli->data_lock);
-  mysql_mutex_unlock(&mi->data_lock);
-  DBUG_VOID_RETURN;
-}
-#endif /* !MYSQL_CLIENT */
-
-
-Slave_log_event::~Slave_log_event()
-{
-  my_free(mem_pool);
-}
-
-
-#ifdef MYSQL_CLIENT
-void Slave_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
-{
-  Write_on_release_cache cache(&print_event_info->head_cache, file);
-
-  char llbuff[22];
-  if (print_event_info->short_form)
-    return;
-  print_header(&cache, print_event_info, FALSE);
-  my_b_printf(&cache, "\n\
-Slave: master_host: '%s'  master_port: %d  master_log: '%s'  master_pos: %s\n",
-	  master_host, master_port, master_log, llstr(master_pos, llbuff));
-}
-#endif /* MYSQL_CLIENT */
-
-
-int Slave_log_event::get_data_size()
-{
-  return master_host_len + master_log_len + 1 + SL_MASTER_HOST_OFFSET;
-}
-
-
-#ifndef MYSQL_CLIENT
-bool Slave_log_event::write(IO_CACHE* file)
-{
-  ulong event_length= get_data_size();
-  int8store(mem_pool + SL_MASTER_POS_OFFSET, master_pos);
-  int2store(mem_pool + SL_MASTER_PORT_OFFSET, master_port);
-  // log and host are already there
-
-  return (write_header(file, event_length) ||
-          my_b_safe_write(file, (uchar*) mem_pool, event_length));
-}
-#endif
-
-
-void Slave_log_event::init_from_mem_pool(int data_size)
-{
-  master_pos = uint8korr(mem_pool + SL_MASTER_POS_OFFSET);
-  master_port = uint2korr(mem_pool + SL_MASTER_PORT_OFFSET);
-  master_host = mem_pool + SL_MASTER_HOST_OFFSET;
-  master_host_len = (uint) strlen(master_host);
-  // safety
-  master_log = master_host + master_host_len + 1;
-  if (master_log > mem_pool + data_size)
-  {
-    master_host = 0;
-    return;
-  }
-  master_log_len = (uint) strlen(master_log);
-}
-
-
-/** This code is not used, so has not been updated to be format-tolerant. */
-/* We are using description_event so that slave does not crash on Log_event
-  constructor */
-Slave_log_event::Slave_log_event(const char* buf, 
-                                 uint event_len,
-                                 const Format_description_log_event* description_event)
-  :Log_event(buf,description_event),mem_pool(0),master_host(0)
-{
-  if (event_len < LOG_EVENT_HEADER_LEN)
-    return;
-  event_len -= LOG_EVENT_HEADER_LEN;
-  if (!(mem_pool = (char*) my_malloc(event_len + 1, MYF(MY_WME))))
-    return;
-  memcpy(mem_pool, buf + LOG_EVENT_HEADER_LEN, event_len);
-  mem_pool[event_len] = 0;
-  init_from_mem_pool(event_len);
-}
-
-
-#ifndef MYSQL_CLIENT
-int Slave_log_event::do_apply_event(rpl_group_info *rgi)
-{
-  if (mysql_bin_log.is_open())
-    return mysql_bin_log.write(this);
-  return 0;
-}
-#endif /* !MYSQL_CLIENT */
-
-
 /**************************************************************************
 	Stop_log_event methods
 **************************************************************************/

sql/log_event.h

@@ -2040,96 +2040,6 @@ class Query_log_event: public Log_event
 };
 
 
-#ifdef HAVE_REPLICATION
-
-/**
-  @class Slave_log_event
-
-  Note that this class is currently not used at all; no code writes a
-  @c Slave_log_event (though some code in @c repl_failsafe.cc reads @c
-  Slave_log_event).  So it's not a problem if this code is not
-  maintained.
-
-  @section Slave_log_event_binary_format Binary Format
-
-  This event type has no Post-Header. The Body has the following
-  four components.
-
-  <table>
-  <caption>Body for Slave_log_event</caption>
-
-  <tr>
-    <th>Name</th>
-    <th>Format</th>
-    <th>Description</th>
-  </tr>
-
-  <tr>
-    <td>master_pos</td>
-    <td>8 byte integer</td>
-    <td>???TODO
-    </td>
-  </tr>
-
-  <tr>
-    <td>master_port</td>
-    <td>2 byte integer</td>
-    <td>???TODO</td>
-  </tr>
-
-  <tr>
-    <td>master_host</td>
-    <td>null-terminated string</td>
-    <td>???TODO</td>
-  </tr>
-
-  <tr>
-    <td>master_log</td>
-    <td>null-terminated string</td>
-    <td>???TODO</td>
-  </tr>
-  </table>
-*/
-class Slave_log_event: public Log_event
-{
-protected:
-  char* mem_pool;
-  void init_from_mem_pool(int data_size);
-public:
-  my_off_t master_pos;
-  char* master_host;
-  char* master_log;
-  int master_host_len;
-  int master_log_len;
-  uint16 master_port;
-
-#ifdef MYSQL_SERVER
-  Slave_log_event(THD* thd_arg, Relay_log_info* rli);
-  void pack_info(THD *thd, Protocol* protocol);
-#else
-  void print(FILE* file, PRINT_EVENT_INFO* print_event_info);
-#endif
-
-  Slave_log_event(const char* buf,
-                  uint event_len,
-                  const Format_description_log_event *description_event);
-  ~Slave_log_event();
-  int get_data_size();
-  bool is_valid() const { return master_host != 0; }
-  Log_event_type get_type_code() { return SLAVE_EVENT; }
-#ifdef MYSQL_SERVER
-  bool write(IO_CACHE* file);
-#endif
-
-private:
-#if defined(MYSQL_SERVER) && defined(HAVE_REPLICATION)
-  virtual int do_apply_event(rpl_group_info *rgi);
-#endif
-};
-
-#endif /* HAVE_REPLICATION */
-
-
 /**
   @class Load_log_event
 

sql/sql_class.h

@@ -68,7 +68,6 @@ struct rpl_group_info;
 class Rpl_filter;
 class Query_log_event;
 class Load_log_event;
-class Slave_log_event;
 class sp_rcontext;
 class sp_cache;
 class Lex_input_stream;